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-rw-r--r--html/030container.cc.html1834
1 files changed, 929 insertions, 905 deletions
diff --git a/html/030container.cc.html b/html/030container.cc.html
index edf98ada..f94ee2e0 100644
--- a/html/030container.cc.html
+++ b/html/030container.cc.html
@@ -6,7 +6,7 @@
 <meta name="Generator" content="Vim/7.4">
 <meta name="plugin-version" content="vim7.4_v2">
 <meta name="syntax" content="cpp">
-<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy=">
+<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
 <meta name="colorscheme" content="minimal">
 <style type="text/css">
 <!--
@@ -16,6 +16,7 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 .SalientComment { color: #00ffff; }
 .CommentedCode { color: #6c6c6c; }
 .muRecipe { color: #ff8700; }
+.LineNr { color: #444444; }
 .muData { color: #ffff00; }
 .traceContains { color: #008000; }
 .Delimiter { color: #800080; }
@@ -32,914 +33,937 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <script type='text/javascript'>
 <!--
 
+/* function to open any folds containing a jumped-to line before jumping to it */
+function JumpToLine()
+{
+  var lineNum;
+  lineNum = window.location.hash;
+  lineNum = lineNum.substr(1); /* strip off '#' */
+
+  if (lineNum.indexOf('L') == -1) {
+    lineNum = 'L'+lineNum;
+  }
+  lineElem = document.getElementById(lineNum);
+  /* Always jump to new location even if the line was hidden inside a fold, or
+   * we corrected the raw number to a line ID.
+   */
+  if (lineElem) {
+    lineElem.scrollIntoView(true);
+  }
+  return true;
+}
+if ('onhashchange' in window) {
+  window.onhashchange = JumpToLine;
+}
+
 -->
 </script>
 </head>
-<body>
+<body onload='JumpToLine();'>
 <pre id='vimCodeElement'>
-<span class="Comment">//: Containers contain a fixed number of elements of different types.</span>
-
-<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
-<span class="Comment">//: We'll use this container as a running example in scenarios below.</span>
-type_ordinal point = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;point&quot;</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
-get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">);</span>  <span class="Comment">// initialize</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>kind = CONTAINER<span class="Delimiter">;</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>name = <span class="Constant">&quot;point&quot;</span><span class="Delimiter">;</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;x:number&quot;</span><span class="Delimiter">));</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;y:number&quot;</span><span class="Delimiter">));</span>
-
-<span class="Comment">//: Containers can be copied around with a single instruction just like</span>
-<span class="Comment">//: numbers, no matter how large they are.</span>
-
-<span class="Comment">//: Tests in this layer often explicitly set up memory before reading it as a</span>
-<span class="Comment">//: container. Don't do this in general. I'm tagging exceptions with /unsafe to</span>
-<span class="Comment">//: skip later checks.</span>
-<span class="Delimiter">:(scenario copy_multiple_locations)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:point/unsafe
-]
-<span class="traceContains">+mem: storing 34 in location 3</span>
-<span class="traceContains">+mem: storing 35 in location 4</span>
-
-<span class="Comment">//: trying to copy to a differently-typed destination will fail</span>
-<span class="Delimiter">:(scenario copy_checks_size)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">2</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:num
-]
-<span class="traceContains">+error: main: can't copy '1:num' to '2:point'; types don't match</span>
-
-<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
-<span class="Comment">// A more complex example container, containing another container as one of</span>
-<span class="Comment">// its elements.</span>
-type_ordinal point_number = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;point-number&quot;</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
-get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">);</span>  <span class="Comment">// initialize</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>kind = CONTAINER<span class="Delimiter">;</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>name = <span class="Constant">&quot;point-number&quot;</span><span class="Delimiter">;</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;xy:point&quot;</span><span class="Delimiter">));</span>
-get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;z:number&quot;</span><span class="Delimiter">));</span>
-
-<span class="Delimiter">:(scenario copy_handles_nested_container_elements)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  <span class="Constant">15</span>:point-number<span class="Special"> &lt;- </span>copy <span class="Constant">12</span>:point-number/unsafe
-]
-<span class="traceContains">+mem: storing 36 in location 17</span>
-
-<span class="Comment">//: products of recipes can include containers</span>
-<span class="Delimiter">:(scenario return_container)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>f <span class="Constant">2</span>
-]
-<span class="muRecipe">def</span> f [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>next-ingredient
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Identifier">return</span> <span class="Constant">12</span>:point/<span class="Special">raw</span>
-]
-<span class="traceContains">+run: result 0 is [2, 35]</span>
-<span class="traceContains">+mem: storing 2 in location 3</span>
-<span class="traceContains">+mem: storing 35 in location 4</span>
-
-<span class="Comment">//: Containers can be checked for equality with a single instruction just like</span>
-<span class="Comment">//: numbers, no matter how large they are.</span>
-
-<span class="Delimiter">:(scenario compare_multiple_locations)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
-  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># second</span>
-  <span class="Constant">5</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">6</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  <span class="Constant">7</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">4</span>:point-number/unsafe
-]
-<span class="traceContains">+mem: storing 1 in location 7</span>
-
-<span class="Delimiter">:(scenario compare_multiple_locations_2)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
-  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># second</span>
-  <span class="Constant">5</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">6</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">37</span>  <span class="Comment"># different</span>
-  <span class="Constant">7</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">4</span>:point-number/unsafe
-]
-<span class="traceContains">+mem: storing 0 in location 7</span>
-
-<span class="Comment">//: Can't put this in type_info because later layers will add support for more</span>
-<span class="Comment">//: complex type trees where metadata depends on *combinations* of types.</span>
-<span class="Delimiter">:(before &quot;struct reagent&quot;)</span>
-<span class="Normal">struct</span> container_metadata <span class="Delimiter">{</span>
-  <span class="Normal">int</span> size<span class="Delimiter">;</span>
-  vector&lt;<span class="Normal">int</span>&gt; offset<span class="Delimiter">;</span>  <span class="Comment">// not used by exclusive containers</span>
-  <span class="Comment">// End container_metadata Fields</span>
-  container_metadata<span class="Delimiter">()</span> :size<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Comment">// End container_metadata Constructor</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">};</span>
-<span class="Delimiter">:(before &quot;End reagent Fields&quot;)</span>
-container_metadata metadata<span class="Delimiter">;</span>  <span class="Comment">// can't be a pointer into Container_metadata because we keep changing the base storage when we save/restore snapshots</span>
-<span class="Delimiter">:(before &quot;End reagent Copy Operator&quot;)</span>
-metadata = other<span class="Delimiter">.</span>metadata<span class="Delimiter">;</span>
-<span class="Delimiter">:(before &quot;End reagent Copy Constructor&quot;)</span>
-metadata = other<span class="Delimiter">.</span>metadata<span class="Delimiter">;</span>
-
-<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
-<span class="Comment">// todo: switch to map after figuring out how to consistently compare type trees</span>
-vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt; Container_metadata<span class="Delimiter">,</span> Container_metadata_snapshot<span class="Delimiter">;</span>
-<span class="Delimiter">:(before &quot;End save_snapshots&quot;)</span>
-Container_metadata_snapshot = Container_metadata<span class="Delimiter">;</span>
-<span class="Delimiter">:(before &quot;End restore_snapshots&quot;)</span>
-restore_container_metadata<span class="Delimiter">();</span>
-<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
-atexit<span class="Delimiter">(</span>clear_container_metadata<span class="Delimiter">);</span>
-<span class="Delimiter">:(code)</span>
-<span class="Comment">// invariant: Container_metadata always contains a superset of Container_metadata_snapshot</span>
-<span class="Normal">void</span> restore_container_metadata<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    assert<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">);</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>i &lt; SIZE<span class="Delimiter">(</span>Container_metadata_snapshot<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-      assert<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first == Container_metadata_snapshot<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">);</span>
-      <span class="Identifier">continue</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">delete</span> Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">;</span>
-    Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first = <span class="Constant">NULL</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  Container_metadata<span class="Delimiter">.</span>resize<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Container_metadata_snapshot<span class="Delimiter">));</span>
-<span class="Delimiter">}</span>
-<span class="Normal">void</span> clear_container_metadata<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  Container_metadata_snapshot<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">delete</span> Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">;</span>
-    Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first = <span class="Constant">NULL</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  Container_metadata<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
-<span class="Delimiter">}</span>
-
-<span class="Comment">//: do no work in size_of, simply lookup Container_metadata</span>
-
-<span class="Delimiter">:(before &quot;End size_of(reagent r) Special-cases&quot;)</span>
-<span class="Normal">if</span> <span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">)</span> <span class="Identifier">return</span> r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">;</span>
-
-<span class="Delimiter">:(before &quot;End size_of(type) Special-cases&quot;)</span>
-<span class="Normal">const</span> type_tree* base_type = type<span class="Delimiter">;</span>
-<span class="Comment">// Update base_type in size_of(type)</span>
-<span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-  raise &lt;&lt; <span class="Constant">&quot;no such type &quot;</span> &lt;&lt; base_type<span class="Delimiter">-&gt;</span>value &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-type_info t = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
-<span class="Normal">if</span> <span class="Delimiter">(</span>t<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Comment">// Compute size_of Container</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; <span class="Constant">&quot;unknown size for container type '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-<span class="CommentedCode">//?     DUMP(&quot;&quot;);</span>
-    <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">).</span>size<span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Comment">//: precompute Container_metadata before we need size_of</span>
-<span class="Comment">//: also store a copy in each reagent in each instruction in each recipe</span>
-
-<span class="Delimiter">:(after &quot;End Type Modifying Transforms&quot;)</span>
-Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>compute_container_sizes<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
-<span class="Delimiter">:(code)</span>
-<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- compute container sizes for &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
-    trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;- compute container sizes for &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
-      compute_container_sizes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">&quot; in '&quot;</span>+to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span>+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
-    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
-      compute_container_sizes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">&quot; in '&quot;</span>+to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span>+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span>reagent&amp; r<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  expand_type_abbreviations<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>r<span class="Delimiter">)</span> || is_dummy<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  reagent rcopy = r<span class="Delimiter">;</span>
-  <span class="Comment">// Compute Container Size(reagent rcopy)</span>
-  set&lt;type_tree&gt; pending_metadata<span class="Delimiter">;</span>  <span class="Comment">// might actually be faster to just convert to string rather than compare type_tree directly; so far the difference is negligible</span>
-  compute_container_sizes<span class="Delimiter">(</span>rcopy<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> rcopy<span class="Delimiter">.</span>type<span class="Delimiter">))</span>
-    r<span class="Delimiter">.</span>metadata = get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> rcopy<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> set&lt;type_tree&gt;&amp; pending_metadata<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;compute container sizes for &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>pending_metadata<span class="Delimiter">,</span> *type<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  pending_metadata<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>*type<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      raise &lt;&lt; <span class="Constant">&quot;invalid type &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; location_for_error_messages &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-      <span class="Identifier">return</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;address&quot;</span><span class="Delimiter">)</span>
-      compute_container_sizes<span class="Delimiter">(</span>payload_type<span class="Delimiter">(</span>type<span class="Delimiter">),</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
-    <span class="Comment">// End compute_container_sizes Non-atom Special-cases</span>
-    <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  assert<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</span>
-  type_info&amp; info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">)</span>
-    compute_container_sizes<span class="Delimiter">(</span>info<span class="Delimiter">,</span> type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
-  <span class="Comment">// End compute_container_sizes Atom Special-cases</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> type_info&amp; container_info<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* full_type<span class="Delimiter">,</span> set&lt;type_tree&gt;&amp; pending_metadata<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  assert<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">);</span>
-  <span class="Comment">// size of a container is the sum of the sizes of its element</span>
-  <span class="Comment">// (So it can only contain arrays if they're static and include their</span>
-  <span class="Comment">// length in the type.)</span>
-  container_metadata metadata<span class="Delimiter">;</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>elements<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = container_info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
-    <span class="Comment">// Compute Container Size(element, full_type)</span>
-    compute_container_sizes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
-    metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">);</span>  <span class="Comment">// save previous size as offset</span>
-    metadata<span class="Delimiter">.</span>size += size_of<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  Container_metadata<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt;<span class="Delimiter">(</span><span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*full_type<span class="Delimiter">),</span> metadata<span class="Delimiter">));</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">const</span> type_tree* payload_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
-  <span class="Normal">const</span> type_tree* result = type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">;</span>
-  assert<span class="Delimiter">(</span>!result<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!result<span class="Delimiter">-&gt;</span>right<span class="Delimiter">)</span> <span class="Identifier">return</span> result<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
-  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-container_metadata&amp; get<span class="Delimiter">(</span>vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt;&amp; all<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* key<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>all<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>matches<span class="Delimiter">(</span>all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">,</span> key<span class="Delimiter">))</span>
-      <span class="Identifier">return</span> all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  tb_shutdown<span class="Delimiter">();</span>
-  raise &lt;&lt; <span class="Constant">&quot;unknown size for type '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>key<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-  assert<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">bool</span> contains_key<span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt;&amp; all<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* key<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>all<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>matches<span class="Delimiter">(</span>all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">,</span> key<span class="Delimiter">))</span>
-      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">bool</span> matches<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* a<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>a == b<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!a || !b<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>atom != b<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> a<span class="Delimiter">-&gt;</span>value == b<span class="Delimiter">-&gt;</span>value<span class="Delimiter">;</span>
-  <span class="Identifier">return</span> matches<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>left<span class="Delimiter">)</span> &amp;&amp; matches<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>right<span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(scenario stash_container)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
-  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:point-number/<span class="Special">raw</span>
-]
-<span class="traceContains">+app: foo: 34 35 36</span>
-
-<span class="Comment">//: for the following unit tests we'll do the work of the transform by hand</span>
-
-<span class="Delimiter">:(before &quot;End Unit Tests&quot;)</span>
-<span class="Normal">void</span> test_container_sizes<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Comment">// a container we don't have the size for</span>
-  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
-  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  <span class="Comment">// scan</span>
-  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
-  <span class="Comment">// the reagent we scanned knows its size</span>
-  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
-  <span class="Comment">// the global table also knows its size</span>
-  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> test_container_sizes_through_aliases<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Comment">// a new alias for a container</span>
-  put<span class="Delimiter">(</span>Type_abbreviations<span class="Delimiter">,</span> <span class="Constant">&quot;pt&quot;</span><span class="Delimiter">,</span> new_type_tree<span class="Delimiter">(</span><span class="Constant">&quot;point&quot;</span><span class="Delimiter">));</span>
-  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:pt&quot;</span><span class="Delimiter">);</span>
-  <span class="Comment">// scan</span>
-  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
-  <span class="Comment">// the reagent we scanned knows its size</span>
-  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
-  <span class="Comment">// the global table also knows its size</span>
-  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> test_container_sizes_nested<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Comment">// a container we don't have the size for</span>
-  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:point-number&quot;</span><span class="Delimiter">);</span>
-  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  <span class="Comment">// scan</span>
-  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
-  <span class="Comment">// the reagent we scanned knows its size</span>
-  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">3</span><span class="Delimiter">);</span>
-  <span class="Comment">// the global table also knows its size</span>
-  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">3</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> test_container_sizes_recursive<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Comment">// define a container containing an address to itself</span>
-  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;  x:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;  y:address:foo</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
-  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:foo&quot;</span><span class="Delimiter">);</span>
-  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
-  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> test_container_sizes_from_address<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Comment">// a container we don't have the size for</span>
-  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
-  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  <span class="Comment">// scanning an address to the container precomputes the size of the container</span>
-  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:address:point&quot;</span><span class="Delimiter">);</span>
-  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
-  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
-  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="SalientComment">//:: To access elements of a container, use 'get'</span>
-<span class="Comment">//: 'get' takes a 'base' container and an 'offset' into it and returns the</span>
-<span class="Comment">//: appropriate element of the container value.</span>
-
-<span class="Delimiter">:(scenario get)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">15</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
-]
-<span class="traceContains">+mem: storing 35 in location 15</span>
-
-<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
-GET<span class="Delimiter">,</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
-put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;get&quot;</span><span class="Delimiter">,</span> GET<span class="Delimiter">);</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
-<span class="Normal">case</span> GET: <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get' expects exactly 2 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>  <span class="Comment">// new copy for every invocation</span>
-  <span class="Comment">// Update GET base in Check</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
-  <span class="Comment">// Update GET base_type in Check</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_type<span class="Delimiter">-&gt;</span>atom || base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">const</span> reagent&amp; offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'get' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
-  <span class="Comment">//: later layers will permit non-integer offsets</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span>
-    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
-  <span class="Normal">else</span>
-    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset '&quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot;' for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Comment">// Update GET product in Check</span>
-  <span class="Comment">//: use base.type rather than base_type because later layers will introduce compound types</span>
-  <span class="Normal">const</span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset_value<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span> element<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but '&quot;</span> &lt;&lt; product<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;' has type &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>product<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Identifier">break</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
-<span class="Normal">case</span> GET: <span class="Delimiter">{</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Comment">// Update GET base in Run</span>
-  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
-  <span class="Comment">// Update GET base_type in Run</span>
-  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
-  assert<span class="Delimiter">(</span>base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">);</span>
-  <span class="Normal">int</span> src = base_address + base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy is &quot;</span> &lt;&lt; src &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Comment">//: use base.type rather than base_type because later layers will introduce compound types</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset<span class="Delimiter">);</span>
-  element<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>src<span class="Delimiter">);</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;its type is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Comment">// Read element</span>
-  products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>element<span class="Delimiter">));</span>
-  <span class="Identifier">break</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(code)</span>
-<span class="Normal">const</span> reagent element_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">int</span> offset_value<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  assert<span class="Delimiter">(</span>offset_value &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Normal">const</span> type_tree* base_type = type<span class="Delimiter">;</span>
-  <span class="Comment">// Update base_type in element_type</span>
-  assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">));</span>
-  assert<span class="Delimiter">(</span>!get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
-  <span class="Normal">const</span> type_info&amp; info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
-  assert<span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &gt;= SIZE<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">))</span> <span class="Identifier">return</span> reagent<span class="Delimiter">();</span>  <span class="Comment">// error handled elsewhere</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset_value<span class="Delimiter">);</span>
-  <span class="Comment">// End element_type Special-cases</span>
-  <span class="Identifier">return</span> element<span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(scenario get_handles_nested_container_elements)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  <span class="Constant">15</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
-]
-<span class="traceContains">+mem: storing 36 in location 15</span>
-
-<span class="Delimiter">:(scenario get_out_of_bounds)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2:offset</span>  <span class="Comment"># point-number occupies 3 locations but has only 2 fields; out of bounds</span>
-]
-<span class="traceContains">+error: main: invalid offset '2' for 'point-number'</span>
-
-<span class="Delimiter">:(scenario get_out_of_bounds_2)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">-1:offset</span>
-]
-<span class="traceContains">+error: main: invalid offset '-1' for 'point-number'</span>
-
-<span class="Delimiter">:(scenario get_product_type_mismatch)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
-  <span class="Constant">15</span>:address:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>
-]
-<span class="traceContains">+error: main: 'get 12:point-number/raw, 1:offset' should write to number but '15' has type (address number)</span>
-
-<span class="Comment">//: we might want to call 'get' without saving the results, say in a sandbox</span>
-
-<span class="Delimiter">:(scenario get_without_product)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  get <span class="Constant">12</span>:point/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
-]
-<span class="Comment"># just don't die</span>
-
-<span class="SalientComment">//:: To write to elements of containers, use 'put'.</span>
-
-<span class="Delimiter">:(scenario put)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  $clear-trace
-  <span class="Constant">12</span>:point<span class="Special"> &lt;- </span>put <span class="Constant">12</span>:point<span class="Delimiter">,</span> <span class="Constant">1:offset</span><span class="Delimiter">,</span> <span class="Constant">36</span>
-]
-<span class="traceContains">+mem: storing 36 in location 13</span>
-<span class="traceAbsent">-mem: storing 34 in location 12</span>
-
-<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
-PUT<span class="Delimiter">,</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
-put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;put&quot;</span><span class="Delimiter">,</span> PUT<span class="Delimiter">);</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
-<span class="Normal">case</span> PUT: <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">3</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'put' expects exactly 3 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Comment">// Update PUT base in Check</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'put' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
-  <span class="Comment">// Update PUT base_type in Check</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_type<span class="Delimiter">-&gt;</span>atom || base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'put' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
-  <span class="Comment">// Update PUT offset in Check</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'put' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
-  <span class="Comment">//: later layers will permit non-integer offsets</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-      raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset '&quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot;' for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-      <span class="Identifier">break</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">else</span> <span class="Delimiter">{</span>
-    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">const</span> reagent&amp; value = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
-  <span class="Comment">//: use base.type rather than base_type because later layers will introduce compound types</span>
-  <span class="Normal">const</span> reagent&amp; element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset_value<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>element<span class="Delimiter">,</span> value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'put &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but '&quot;</span> &lt;&lt; value<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;' has type &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>value<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// no more checks necessary</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name != inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;product of 'put' must be first ingredient '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Comment">// End PUT Product Checks</span>
-  <span class="Identifier">break</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
-<span class="Normal">case</span> PUT: <span class="Delimiter">{</span>
-  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Comment">// Update PUT base in Run</span>
-  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">break</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
-  <span class="Comment">// Update PUT base_type in Run</span>
-  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
-  <span class="Normal">int</span> address = base_address + base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy to is &quot;</span> &lt;&lt; address &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Comment">// optimization: directly write the element rather than updating 'product'</span>
-  <span class="Comment">// and writing the entire container</span>
-  <span class="Comment">// Write Memory in PUT in Run</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">));</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;mem&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;storing &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot; in location &quot;</span> &lt;&lt; address+i &lt;&lt; end<span class="Delimiter">();</span>
-    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address+i<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
-  <span class="Delimiter">}</span>
-  <span class="Identifier">goto</span> finish_instruction<span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(scenario put_product_error)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muRecipe">def</span> main [
-  local-scope
-  load-ingredients
-  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">35</span>
-  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>put <span class="Constant">1</span>:point<span class="Delimiter">,</span> <span class="Constant">x:offset</span><span class="Delimiter">,</span> <span class="Constant">36</span>
-]
-<span class="traceContains">+error: main: product of 'put' must be first ingredient '1:point', but got '3:point'</span>
-
-<span class="SalientComment">//:: Allow containers to be defined in Mu code.</span>
-
-<span class="Delimiter">:(scenarios load)</span>
-<span class="Delimiter">:(scenario container)</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">x</span>:num
-  <span class="Normal">y</span>:num
-]
-<span class="traceContains">+parse: --- defining container foo</span>
-<span class="traceContains">+parse: element: {x: &quot;number&quot;}</span>
-<span class="traceContains">+parse: element: {y: &quot;number&quot;}</span>
-
-<span class="Delimiter">:(scenario container_use_before_definition)</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">x</span>:num
-  <span class="Normal">y</span>:bar
-]
-<span class="muData">container</span> bar [
-  <span class="Normal">x</span>:num
-  <span class="Normal">y</span>:num
-]
-<span class="traceContains">+parse: --- defining container foo</span>
-<span class="traceContains">+parse: type number: 1000</span>
-<span class="traceContains">+parse:   element: {x: &quot;number&quot;}</span>
-<span class="Comment"># todo: brittle</span>
-<span class="Comment"># type bar is unknown at this point, but we assign it a number</span>
-<span class="traceContains">+parse:   element: {y: &quot;bar&quot;}</span>
-<span class="Comment"># later type bar geon</span>
-<span class="traceContains">+parse: --- defining container bar</span>
-<span class="traceContains">+parse: type number: 1001</span>
-<span class="traceContains">+parse:   element: {x: &quot;number&quot;}</span>
-<span class="traceContains">+parse:   element: {y: &quot;number&quot;}</span>
-
-<span class="Comment">//: if a container is defined again, the new fields add to the original definition</span>
-<span class="Delimiter">:(scenarios run)</span>
-<span class="Delimiter">:(scenario container_extend)</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">x</span>:num
-]
-<span class="Comment"># add to previous definition</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">y</span>:num
-]
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
-  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
-  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> <span class="Constant">1:offset</span>
-]
-<span class="traceContains">+mem: storing 34 in location 3</span>
-<span class="traceContains">+mem: storing 35 in location 4</span>
-
-<span class="Delimiter">:(before &quot;End Command Handlers&quot;)</span>
-<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>command == <span class="Constant">&quot;container&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  insert_container<span class="Delimiter">(</span>command<span class="Delimiter">,</span> CONTAINER<span class="Delimiter">,</span> in<span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Comment">//: Even though we allow containers to be extended, we don't allow this after</span>
-<span class="Comment">//: a call to transform_all. But we do want to detect this situation and raise</span>
-<span class="Comment">//: an error. This field will help us raise such errors.</span>
-<span class="Delimiter">:(before &quot;End type_info Fields&quot;)</span>
-<span class="Normal">int</span> Num_calls_to_transform_all_at_first_definition<span class="Delimiter">;</span>
-<span class="Delimiter">:(before &quot;End type_info Constructor&quot;)</span>
-Num_calls_to_transform_all_at_first_definition = -<span class="Constant">1</span><span class="Delimiter">;</span>
-
-<span class="Delimiter">:(code)</span>
-<span class="Normal">void</span> insert_container<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; command<span class="Delimiter">,</span> kind_of_type kind<span class="Delimiter">,</span> istream&amp; in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
-  string name = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
-    assert<span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">));</span>
-    raise &lt;&lt; <span class="Constant">&quot;incomplete container definition at end of file (0)</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Comment">// End container Name Refinements</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- defining &quot;</span> &lt;&lt; command &lt;&lt; <span class="Constant">' '</span> &lt;&lt; name &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span>
-      || get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;type number: &quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
-  skip_bracket<span class="Delimiter">(</span>in<span class="Delimiter">,</span> <span class="Constant">&quot;'&quot;</span>+command+<span class="Constant">&quot;' must begin with '['&quot;</span><span class="Delimiter">);</span>
-  type_info&amp; info = get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">));</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Comment">// initial definition of this container</span>
-    info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition = Num_calls_to_transform_all<span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition != Num_calls_to_transform_all<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Comment">// extension after transform_all</span>
-    raise &lt;&lt; <span class="Constant">&quot;there was a call to transform_all() between the definition of container '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' and a subsequent extension. This is not supported, since any recipes that used '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' values have already been transformed and </span><span class="cSpecial">\&quot;</span><span class="Constant">frozen</span><span class="cSpecial">\&quot;</span><span class="Constant">.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  info<span class="Delimiter">.</span>name = name<span class="Delimiter">;</span>
-  info<span class="Delimiter">.</span>kind = kind<span class="Delimiter">;</span>
-  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
-    string element = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>element<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
-      assert<span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">));</span>
-      raise &lt;&lt; <span class="Constant">&quot;incomplete container definition at end of file (1)</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-      <span class="Identifier">return</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>element == <span class="Constant">&quot;]&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      raise &lt;&lt; command &lt;&lt; <span class="Constant">&quot; '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' contains multiple elements on a single line. Containers and exclusive containers must only contain elements, one to a line, no code.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
-      <span class="Comment">// skip rest of container declaration</span>
-      <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-        skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>next_word<span class="Delimiter">(</span>in<span class="Delimiter">)</span> == <span class="Constant">&quot;]&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-      <span class="Delimiter">}</span>
-      <span class="Identifier">break</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>element<span class="Delimiter">));</span>
-    expand_type_abbreviations<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">);</span>  <span class="Comment">// todo: use abbreviation before declaration</span>
-    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
-    trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;  element: &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">())</span> &lt;&lt; end<span class="Delimiter">();</span>
-    <span class="Comment">// End Load Container Element Definition</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> type_info&amp; info<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
-    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
-    <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  <span class="Comment">// End insert_container Special-cases</span>
-  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>name != <span class="Constant">&quot;-&gt;&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// used in recipe types</span>
-    put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
-    type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> skip_bracket<span class="Delimiter">(</span>istream&amp; in<span class="Delimiter">,</span> string message<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'['</span><span class="Delimiter">)</span>
-    raise &lt;&lt; message &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(scenario multi_word_line_in_container_declaration)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">x</span>:num y:num
-]
-<span class="traceContains">+error: container 'foo' contains multiple elements on a single line. Containers and exclusive containers must only contain elements, one to a line, no code.</span>
-
-<span class="Comment">//: support type abbreviations in container definitions</span>
-
-<span class="Delimiter">:(scenario type_abbreviations_in_containers)</span>
-<span class="muData">type</span> foo = number
-<span class="muData">container</span> bar [
-  <span class="Normal">x</span>:foo
-]
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
-  <span class="Constant">2</span>:foo<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:bar/unsafe<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
-]
-<span class="traceContains">+mem: storing 34 in location 2</span>
-
-<span class="Delimiter">:(after &quot;Transform.push_back(expand_type_abbreviations)&quot;)</span>
-Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>expand_type_abbreviations_in_containers<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
-<span class="Delimiter">:(code)</span>
-<span class="Comment">// extremely inefficient; we process all types over and over again, once for every single recipe</span>
-<span class="Comment">// but it doesn't seem to cause any noticeable slowdown</span>
-<span class="Normal">void</span> expand_type_abbreviations_in_containers<span class="Delimiter">(</span>unused <span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt;::iterator p = Type<span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != Type<span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">.</span>elements<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
-      expand_type_abbreviations<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Comment">//: ensure scenarios are consistent by always starting new container</span>
-<span class="Comment">//: declarations at the same type number</span>
-<span class="Delimiter">:(before &quot;End Setup&quot;)</span>  <span class="Comment">//: for tests</span>
-Next_type_ordinal = <span class="Constant">1000</span><span class="Delimiter">;</span>
-<span class="Delimiter">:(before &quot;End Test Run Initialization&quot;)</span>
-assert<span class="Delimiter">(</span>Next_type_ordinal &lt; <span class="Constant">1000</span><span class="Delimiter">);</span>
-
-<span class="Delimiter">:(code)</span>
-<span class="Normal">void</span> test_error_on_transform_all_between_container_definition_and_extension<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Comment">// define a container</span>
-  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;  a:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
-  <span class="Comment">// try to extend the container after transform</span>
-  transform_all<span class="Delimiter">();</span>
-  CHECK_TRACE_DOESNT_CONTAIN_ERRORS<span class="Delimiter">();</span>
-  Hide_errors = <span class="Constant">true</span><span class="Delimiter">;</span>
-  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;  b:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
-      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
-  CHECK_TRACE_CONTAINS_ERRORS<span class="Delimiter">();</span>
-<span class="Delimiter">}</span>
-
-<span class="SalientComment">//:: Allow container definitions anywhere in the codebase, but complain if you</span>
-<span class="SalientComment">//:: can't find a definition at the end.</span>
-
-<span class="Delimiter">:(scenario run_complains_on_unknown_types)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muRecipe">def</span> main [
-  <span class="Comment"># integer is not a type</span>
-  <span class="Constant">1</span>:integer<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-]
-<span class="traceContains">+error: main: unknown type integer in '1:integer &lt;- copy 0'</span>
-
-<span class="Delimiter">:(scenario run_allows_type_definition_after_use)</span>
-<span class="muRecipe">def</span> main [
-  <span class="Constant">1</span>:bar<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
-]
-<span class="muData">container</span> bar [
-  <span class="Normal">x</span>:num
-]
-$error: <span class="Constant">0</span>
-
-<span class="Delimiter">:(before &quot;End Type Modifying Transforms&quot;)</span>
-Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_or_set_invalid_types<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
-
-<span class="Delimiter">:(code)</span>
-<span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
-  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- check for invalid types in recipe &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>  index &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span>  ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
-    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
-      check_or_set_invalid_types<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> caller<span class="Delimiter">,</span> inst<span class="Delimiter">);</span>
-    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
-      check_or_set_invalid_types<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> caller<span class="Delimiter">,</span> inst<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  <span class="Comment">// End check_or_set_invalid_types</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span>reagent&amp; r<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; caller<span class="Delimiter">,</span> <span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Comment">// Begin check_or_set_invalid_types(r)</span>
-  check_or_set_invalid_types<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">),</span> <span class="Constant">&quot;'&quot;</span>+inst<span class="Delimiter">.</span>original_string+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Comment">// End Container Type Checks</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    check_or_set_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
-    check_or_set_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
-    <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span>
-      type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
-    <span class="Normal">else</span>
-      raise &lt;&lt; location_for_error_messages &lt;&lt; <span class="Constant">&quot;unknown type &quot;</span> &lt;&lt; type<span class="Delimiter">-&gt;</span>name &lt;&lt; <span class="Constant">&quot; in &quot;</span> &lt;&lt; name_for_error_messages &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(scenario container_unknown_field)</span>
-<span class="Special">% Hide_errors = true;</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">x</span>:num
-  <span class="Normal">y</span>:bar
-]
-<span class="traceContains">+error: foo: unknown type in y</span>
-
-<span class="Delimiter">:(scenario read_container_with_bracket_in_comment)</span>
-<span class="muData">container</span> foo [
-  <span class="Normal">x</span>:num
-  <span class="Comment"># ']' in comment</span>
-  <span class="Normal">y</span>:num
-]
-<span class="traceContains">+parse: --- defining container foo</span>
-<span class="traceContains">+parse: element: {x: &quot;number&quot;}</span>
-<span class="traceContains">+parse: element: {y: &quot;number&quot;}</span>
-
-<span class="Delimiter">:(scenario container_with_compound_field_type)</span>
-<span class="muData">container</span> foo [
-  <span class="Delimiter">{</span>x: <span class="Delimiter">(</span>address array <span class="Delimiter">(</span>address array character<span class="Delimiter">))}</span>
-]
-$error: <span class="Constant">0</span>
-
-<span class="Delimiter">:(before &quot;End transform_all&quot;)</span>
-check_container_field_types<span class="Delimiter">();</span>
-
-<span class="Delimiter">:(code)</span>
-<span class="Normal">void</span> check_container_field_types<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt;::iterator p = Type<span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != Type<span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">const</span> type_info&amp; info = p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">;</span>
-    <span class="Comment">// Check Container Field Types(info)</span>
-    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
-      check_invalid_types<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>info<span class="Delimiter">.</span>name<span class="Delimiter">),</span> info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> check_invalid_types<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// will throw a more precise error elsewhere</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    check_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
-    check_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
-    <span class="Identifier">return</span><span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// value 0 = compound types (layer parse_tree) or type ingredients (layer shape_shifting_container)</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span>
-      raise &lt;&lt; location_for_error_messages &lt;&lt; <span class="Constant">&quot;unknown type in &quot;</span> &lt;&lt; name_for_error_messages &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
+<a name="L1"></a><span id="L1" class="LineNr">  1 </span><span class="Comment">//: Containers contain a fixed number of elements of different types.</span>
+<a name="L2"></a><span id="L2" class="LineNr">  2 </span>
+<a name="L3"></a><span id="L3" class="LineNr">  3 </span><span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
+<a name="L4"></a><span id="L4" class="LineNr">  4 </span><span class="Comment">//: We'll use this container as a running example in scenarios below.</span>
+<a name="L5"></a><span id="L5" class="LineNr">  5 </span>type_ordinal point = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;point&quot;</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
+<a name="L6"></a><span id="L6" class="LineNr">  6 </span>get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">);</span>  <span class="Comment">// initialize</span>
+<a name="L7"></a><span id="L7" class="LineNr">  7 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>kind = CONTAINER<span class="Delimiter">;</span>
+<a name="L8"></a><span id="L8" class="LineNr">  8 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>name = <span class="Constant">&quot;point&quot;</span><span class="Delimiter">;</span>
+<a name="L9"></a><span id="L9" class="LineNr">  9 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;x:number&quot;</span><span class="Delimiter">));</span>
+<a name="L10"></a><span id="L10" class="LineNr"> 10 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;y:number&quot;</span><span class="Delimiter">));</span>
+<a name="L11"></a><span id="L11" class="LineNr"> 11 </span>
+<a name="L12"></a><span id="L12" class="LineNr"> 12 </span><span class="Comment">//: Containers can be copied around with a single instruction just like</span>
+<a name="L13"></a><span id="L13" class="LineNr"> 13 </span><span class="Comment">//: numbers, no matter how large they are.</span>
+<a name="L14"></a><span id="L14" class="LineNr"> 14 </span>
+<a name="L15"></a><span id="L15" class="LineNr"> 15 </span><span class="Comment">//: Tests in this layer often explicitly set up memory before reading it as a</span>
+<a name="L16"></a><span id="L16" class="LineNr"> 16 </span><span class="Comment">//: container. Don't do this in general. I'm tagging exceptions with /unsafe to</span>
+<a name="L17"></a><span id="L17" class="LineNr"> 17 </span><span class="Comment">//: skip later checks.</span>
+<a name="L18"></a><span id="L18" class="LineNr"> 18 </span><span class="Delimiter">:(scenario copy_multiple_locations)</span>
+<a name="L19"></a><span id="L19" class="LineNr"> 19 </span><span class="muRecipe">def</span> main [
+<a name="L20"></a><span id="L20" class="LineNr"> 20 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L21"></a><span id="L21" class="LineNr"> 21 </span>  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L22"></a><span id="L22" class="LineNr"> 22 </span>  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:point/unsafe
+<a name="L23"></a><span id="L23" class="LineNr"> 23 </span>]
+<a name="L24"></a><span id="L24" class="LineNr"> 24 </span><span class="traceContains">+mem: storing 34 in location 3</span>
+<a name="L25"></a><span id="L25" class="LineNr"> 25 </span><span class="traceContains">+mem: storing 35 in location 4</span>
+<a name="L26"></a><span id="L26" class="LineNr"> 26 </span>
+<a name="L27"></a><span id="L27" class="LineNr"> 27 </span><span class="Comment">//: trying to copy to a differently-typed destination will fail</span>
+<a name="L28"></a><span id="L28" class="LineNr"> 28 </span><span class="Delimiter">:(scenario copy_checks_size)</span>
+<a name="L29"></a><span id="L29" class="LineNr"> 29 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L30"></a><span id="L30" class="LineNr"> 30 </span><span class="muRecipe">def</span> main [
+<a name="L31"></a><span id="L31" class="LineNr"> 31 </span>  <span class="Constant">2</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:num
+<a name="L32"></a><span id="L32" class="LineNr"> 32 </span>]
+<a name="L33"></a><span id="L33" class="LineNr"> 33 </span><span class="traceContains">+error: main: can't copy '1:num' to '2:point'; types don't match</span>
+<a name="L34"></a><span id="L34" class="LineNr"> 34 </span>
+<a name="L35"></a><span id="L35" class="LineNr"> 35 </span><span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
+<a name="L36"></a><span id="L36" class="LineNr"> 36 </span><span class="Comment">// A more complex example container, containing another container as one of</span>
+<a name="L37"></a><span id="L37" class="LineNr"> 37 </span><span class="Comment">// its elements.</span>
+<a name="L38"></a><span id="L38" class="LineNr"> 38 </span>type_ordinal point_number = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;point-number&quot;</span><span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
+<a name="L39"></a><span id="L39" class="LineNr"> 39 </span>get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">);</span>  <span class="Comment">// initialize</span>
+<a name="L40"></a><span id="L40" class="LineNr"> 40 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>kind = CONTAINER<span class="Delimiter">;</span>
+<a name="L41"></a><span id="L41" class="LineNr"> 41 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>name = <span class="Constant">&quot;point-number&quot;</span><span class="Delimiter">;</span>
+<a name="L42"></a><span id="L42" class="LineNr"> 42 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;xy:point&quot;</span><span class="Delimiter">));</span>
+<a name="L43"></a><span id="L43" class="LineNr"> 43 </span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> point_number<span class="Delimiter">).</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span><span class="Constant">&quot;z:number&quot;</span><span class="Delimiter">));</span>
+<a name="L44"></a><span id="L44" class="LineNr"> 44 </span>
+<a name="L45"></a><span id="L45" class="LineNr"> 45 </span><span class="Delimiter">:(scenario copy_handles_nested_container_elements)</span>
+<a name="L46"></a><span id="L46" class="LineNr"> 46 </span><span class="muRecipe">def</span> main [
+<a name="L47"></a><span id="L47" class="LineNr"> 47 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L48"></a><span id="L48" class="LineNr"> 48 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L49"></a><span id="L49" class="LineNr"> 49 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L50"></a><span id="L50" class="LineNr"> 50 </span>  <span class="Constant">15</span>:point-number<span class="Special"> &lt;- </span>copy <span class="Constant">12</span>:point-number/unsafe
+<a name="L51"></a><span id="L51" class="LineNr"> 51 </span>]
+<a name="L52"></a><span id="L52" class="LineNr"> 52 </span><span class="traceContains">+mem: storing 36 in location 17</span>
+<a name="L53"></a><span id="L53" class="LineNr"> 53 </span>
+<a name="L54"></a><span id="L54" class="LineNr"> 54 </span><span class="Comment">//: products of recipes can include containers</span>
+<a name="L55"></a><span id="L55" class="LineNr"> 55 </span><span class="Delimiter">:(scenario return_container)</span>
+<a name="L56"></a><span id="L56" class="LineNr"> 56 </span><span class="muRecipe">def</span> main [
+<a name="L57"></a><span id="L57" class="LineNr"> 57 </span>  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>f <span class="Constant">2</span>
+<a name="L58"></a><span id="L58" class="LineNr"> 58 </span>]
+<a name="L59"></a><span id="L59" class="LineNr"> 59 </span><span class="muRecipe">def</span> f [
+<a name="L60"></a><span id="L60" class="LineNr"> 60 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>next-ingredient
+<a name="L61"></a><span id="L61" class="LineNr"> 61 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L62"></a><span id="L62" class="LineNr"> 62 </span>  <span class="Identifier">return</span> <span class="Constant">12</span>:point/<span class="Special">raw</span>
+<a name="L63"></a><span id="L63" class="LineNr"> 63 </span>]
+<a name="L64"></a><span id="L64" class="LineNr"> 64 </span><span class="traceContains">+run: result 0 is [2, 35]</span>
+<a name="L65"></a><span id="L65" class="LineNr"> 65 </span><span class="traceContains">+mem: storing 2 in location 3</span>
+<a name="L66"></a><span id="L66" class="LineNr"> 66 </span><span class="traceContains">+mem: storing 35 in location 4</span>
+<a name="L67"></a><span id="L67" class="LineNr"> 67 </span>
+<a name="L68"></a><span id="L68" class="LineNr"> 68 </span><span class="Comment">//: Containers can be checked for equality with a single instruction just like</span>
+<a name="L69"></a><span id="L69" class="LineNr"> 69 </span><span class="Comment">//: numbers, no matter how large they are.</span>
+<a name="L70"></a><span id="L70" class="LineNr"> 70 </span>
+<a name="L71"></a><span id="L71" class="LineNr"> 71 </span><span class="Delimiter">:(scenario compare_multiple_locations)</span>
+<a name="L72"></a><span id="L72" class="LineNr"> 72 </span><span class="muRecipe">def</span> main [
+<a name="L73"></a><span id="L73" class="LineNr"> 73 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
+<a name="L74"></a><span id="L74" class="LineNr"> 74 </span>  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L75"></a><span id="L75" class="LineNr"> 75 </span>  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L76"></a><span id="L76" class="LineNr"> 76 </span>  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># second</span>
+<a name="L77"></a><span id="L77" class="LineNr"> 77 </span>  <span class="Constant">5</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L78"></a><span id="L78" class="LineNr"> 78 </span>  <span class="Constant">6</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L79"></a><span id="L79" class="LineNr"> 79 </span>  <span class="Constant">7</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">4</span>:point-number/unsafe
+<a name="L80"></a><span id="L80" class="LineNr"> 80 </span>]
+<a name="L81"></a><span id="L81" class="LineNr"> 81 </span><span class="traceContains">+mem: storing 1 in location 7</span>
+<a name="L82"></a><span id="L82" class="LineNr"> 82 </span>
+<a name="L83"></a><span id="L83" class="LineNr"> 83 </span><span class="Delimiter">:(scenario compare_multiple_locations_2)</span>
+<a name="L84"></a><span id="L84" class="LineNr"> 84 </span><span class="muRecipe">def</span> main [
+<a name="L85"></a><span id="L85" class="LineNr"> 85 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
+<a name="L86"></a><span id="L86" class="LineNr"> 86 </span>  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L87"></a><span id="L87" class="LineNr"> 87 </span>  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L88"></a><span id="L88" class="LineNr"> 88 </span>  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># second</span>
+<a name="L89"></a><span id="L89" class="LineNr"> 89 </span>  <span class="Constant">5</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L90"></a><span id="L90" class="LineNr"> 90 </span>  <span class="Constant">6</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">37</span>  <span class="Comment"># different</span>
+<a name="L91"></a><span id="L91" class="LineNr"> 91 </span>  <span class="Constant">7</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">4</span>:point-number/unsafe
+<a name="L92"></a><span id="L92" class="LineNr"> 92 </span>]
+<a name="L93"></a><span id="L93" class="LineNr"> 93 </span><span class="traceContains">+mem: storing 0 in location 7</span>
+<a name="L94"></a><span id="L94" class="LineNr"> 94 </span>
+<a name="L95"></a><span id="L95" class="LineNr"> 95 </span><span class="Comment">//: Can't put this in type_info because later layers will add support for more</span>
+<a name="L96"></a><span id="L96" class="LineNr"> 96 </span><span class="Comment">//: complex type trees where metadata depends on *combinations* of types.</span>
+<a name="L97"></a><span id="L97" class="LineNr"> 97 </span><span class="Delimiter">:(before &quot;struct reagent&quot;)</span>
+<a name="L98"></a><span id="L98" class="LineNr"> 98 </span><span class="Normal">struct</span> container_metadata <span class="Delimiter">{</span>
+<a name="L99"></a><span id="L99" class="LineNr"> 99 </span>  <span class="Normal">int</span> size<span class="Delimiter">;</span>
+<a name="L100"></a><span id="L100" class="LineNr">100 </span>  vector&lt;<span class="Normal">int</span>&gt; offset<span class="Delimiter">;</span>  <span class="Comment">// not used by exclusive containers</span>
+<a name="L101"></a><span id="L101" class="LineNr">101 </span>  <span class="Comment">// End container_metadata Fields</span>
+<a name="L102"></a><span id="L102" class="LineNr">102 </span>  container_metadata<span class="Delimiter">()</span> :size<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L103"></a><span id="L103" class="LineNr">103 </span>    <span class="Comment">// End container_metadata Constructor</span>
+<a name="L104"></a><span id="L104" class="LineNr">104 </span>  <span class="Delimiter">}</span>
+<a name="L105"></a><span id="L105" class="LineNr">105 </span><span class="Delimiter">};</span>
+<a name="L106"></a><span id="L106" class="LineNr">106 </span><span class="Delimiter">:(before &quot;End reagent Fields&quot;)</span>
+<a name="L107"></a><span id="L107" class="LineNr">107 </span>container_metadata metadata<span class="Delimiter">;</span>  <span class="Comment">// can't be a pointer into Container_metadata because we keep changing the base storage when we save/restore snapshots</span>
+<a name="L108"></a><span id="L108" class="LineNr">108 </span><span class="Delimiter">:(before &quot;End reagent Copy Operator&quot;)</span>
+<a name="L109"></a><span id="L109" class="LineNr">109 </span>metadata = other<span class="Delimiter">.</span>metadata<span class="Delimiter">;</span>
+<a name="L110"></a><span id="L110" class="LineNr">110 </span><span class="Delimiter">:(before &quot;End reagent Copy Constructor&quot;)</span>
+<a name="L111"></a><span id="L111" class="LineNr">111 </span>metadata = other<span class="Delimiter">.</span>metadata<span class="Delimiter">;</span>
+<a name="L112"></a><span id="L112" class="LineNr">112 </span>
+<a name="L113"></a><span id="L113" class="LineNr">113 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
+<a name="L114"></a><span id="L114" class="LineNr">114 </span><span class="Comment">// todo: switch to map after figuring out how to consistently compare type trees</span>
+<a name="L115"></a><span id="L115" class="LineNr">115 </span>vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt; Container_metadata<span class="Delimiter">,</span> Container_metadata_snapshot<span class="Delimiter">;</span>
+<a name="L116"></a><span id="L116" class="LineNr">116 </span><span class="Delimiter">:(before &quot;End save_snapshots&quot;)</span>
+<a name="L117"></a><span id="L117" class="LineNr">117 </span>Container_metadata_snapshot = Container_metadata<span class="Delimiter">;</span>
+<a name="L118"></a><span id="L118" class="LineNr">118 </span><span class="Delimiter">:(before &quot;End restore_snapshots&quot;)</span>
+<a name="L119"></a><span id="L119" class="LineNr">119 </span>restore_container_metadata<span class="Delimiter">();</span>
+<a name="L120"></a><span id="L120" class="LineNr">120 </span><span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
+<a name="L121"></a><span id="L121" class="LineNr">121 </span>atexit<span class="Delimiter">(</span>clear_container_metadata<span class="Delimiter">);</span>
+<a name="L122"></a><span id="L122" class="LineNr">122 </span><span class="Delimiter">:(code)</span>
+<a name="L123"></a><span id="L123" class="LineNr">123 </span><span class="Comment">// invariant: Container_metadata always contains a superset of Container_metadata_snapshot</span>
+<a name="L124"></a><span id="L124" class="LineNr">124 </span><span class="Normal">void</span> restore_container_metadata<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L125"></a><span id="L125" class="LineNr">125 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L126"></a><span id="L126" class="LineNr">126 </span>    assert<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">);</span>
+<a name="L127"></a><span id="L127" class="LineNr">127 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>i &lt; SIZE<span class="Delimiter">(</span>Container_metadata_snapshot<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L128"></a><span id="L128" class="LineNr">128 </span>      assert<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first == Container_metadata_snapshot<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">);</span>
+<a name="L129"></a><span id="L129" class="LineNr">129 </span>      <span class="Identifier">continue</span><span class="Delimiter">;</span>
+<a name="L130"></a><span id="L130" class="LineNr">130 </span>    <span class="Delimiter">}</span>
+<a name="L131"></a><span id="L131" class="LineNr">131 </span>    <span class="Normal">delete</span> Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">;</span>
+<a name="L132"></a><span id="L132" class="LineNr">132 </span>    Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first = <span class="Constant">NULL</span><span class="Delimiter">;</span>
+<a name="L133"></a><span id="L133" class="LineNr">133 </span>  <span class="Delimiter">}</span>
+<a name="L134"></a><span id="L134" class="LineNr">134 </span>  Container_metadata<span class="Delimiter">.</span>resize<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Container_metadata_snapshot<span class="Delimiter">));</span>
+<a name="L135"></a><span id="L135" class="LineNr">135 </span><span class="Delimiter">}</span>
+<a name="L136"></a><span id="L136" class="LineNr">136 </span><span class="Normal">void</span> clear_container_metadata<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L137"></a><span id="L137" class="LineNr">137 </span>  Container_metadata_snapshot<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
+<a name="L138"></a><span id="L138" class="LineNr">138 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L139"></a><span id="L139" class="LineNr">139 </span>    <span class="Normal">delete</span> Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">;</span>
+<a name="L140"></a><span id="L140" class="LineNr">140 </span>    Container_metadata<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first = <span class="Constant">NULL</span><span class="Delimiter">;</span>
+<a name="L141"></a><span id="L141" class="LineNr">141 </span>  <span class="Delimiter">}</span>
+<a name="L142"></a><span id="L142" class="LineNr">142 </span>  Container_metadata<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
+<a name="L143"></a><span id="L143" class="LineNr">143 </span><span class="Delimiter">}</span>
+<a name="L144"></a><span id="L144" class="LineNr">144 </span>
+<a name="L145"></a><span id="L145" class="LineNr">145 </span><span class="Comment">//: do no work in size_of, simply lookup Container_metadata</span>
+<a name="L146"></a><span id="L146" class="LineNr">146 </span>
+<a name="L147"></a><span id="L147" class="LineNr">147 </span><span class="Delimiter">:(before &quot;End size_of(reagent r) Special-cases&quot;)</span>
+<a name="L148"></a><span id="L148" class="LineNr">148 </span><span class="Normal">if</span> <span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">)</span> <span class="Identifier">return</span> r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">;</span>
+<a name="L149"></a><span id="L149" class="LineNr">149 </span>
+<a name="L150"></a><span id="L150" class="LineNr">150 </span><span class="Delimiter">:(before &quot;End size_of(type) Special-cases&quot;)</span>
+<a name="L151"></a><span id="L151" class="LineNr">151 </span><span class="Normal">const</span> type_tree* base_type = type<span class="Delimiter">;</span>
+<a name="L152"></a><span id="L152" class="LineNr">152 </span><span class="Comment">// Update base_type in size_of(type)</span>
+<a name="L153"></a><span id="L153" class="LineNr">153 </span><span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L154"></a><span id="L154" class="LineNr">154 </span>  raise &lt;&lt; <span class="Constant">&quot;no such type &quot;</span> &lt;&lt; base_type<span class="Delimiter">-&gt;</span>value &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L155"></a><span id="L155" class="LineNr">155 </span>  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L156"></a><span id="L156" class="LineNr">156 </span><span class="Delimiter">}</span>
+<a name="L157"></a><span id="L157" class="LineNr">157 </span>type_info t = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
+<a name="L158"></a><span id="L158" class="LineNr">158 </span><span class="Normal">if</span> <span class="Delimiter">(</span>t<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L159"></a><span id="L159" class="LineNr">159 </span>  <span class="Comment">// Compute size_of Container</span>
+<a name="L160"></a><span id="L160" class="LineNr">160 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L161"></a><span id="L161" class="LineNr">161 </span>    raise &lt;&lt; <span class="Constant">&quot;unknown size for container type '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L162"></a><span id="L162" class="LineNr">162 </span><span class="CommentedCode">//?     DUMP(&quot;&quot;);</span>
+<a name="L163"></a><span id="L163" class="LineNr">163 </span>    <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L164"></a><span id="L164" class="LineNr">164 </span>  <span class="Delimiter">}</span>
+<a name="L165"></a><span id="L165" class="LineNr">165 </span>  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">).</span>size<span class="Delimiter">;</span>
+<a name="L166"></a><span id="L166" class="LineNr">166 </span><span class="Delimiter">}</span>
+<a name="L167"></a><span id="L167" class="LineNr">167 </span>
+<a name="L168"></a><span id="L168" class="LineNr">168 </span><span class="Comment">//: precompute Container_metadata before we need size_of</span>
+<a name="L169"></a><span id="L169" class="LineNr">169 </span><span class="Comment">//: also store a copy in each reagent in each instruction in each recipe</span>
+<a name="L170"></a><span id="L170" class="LineNr">170 </span>
+<a name="L171"></a><span id="L171" class="LineNr">171 </span><span class="Delimiter">:(after &quot;End Type Modifying Transforms&quot;)</span>
+<a name="L172"></a><span id="L172" class="LineNr">172 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>compute_container_sizes<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+<a name="L173"></a><span id="L173" class="LineNr">173 </span><span class="Delimiter">:(code)</span>
+<a name="L174"></a><span id="L174" class="LineNr">174 </span><span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L175"></a><span id="L175" class="LineNr">175 </span>  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
+<a name="L176"></a><span id="L176" class="LineNr">176 </span>  trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- compute container sizes for &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L177"></a><span id="L177" class="LineNr">177 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L178"></a><span id="L178" class="LineNr">178 </span>    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+<a name="L179"></a><span id="L179" class="LineNr">179 </span>    trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;- compute container sizes for &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L180"></a><span id="L180" class="LineNr">180 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
+<a name="L181"></a><span id="L181" class="LineNr">181 </span>      compute_container_sizes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">&quot; in '&quot;</span>+to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span>+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
+<a name="L182"></a><span id="L182" class="LineNr">182 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
+<a name="L183"></a><span id="L183" class="LineNr">183 </span>      compute_container_sizes<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> <span class="Constant">&quot; in '&quot;</span>+to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span>+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
+<a name="L184"></a><span id="L184" class="LineNr">184 </span>  <span class="Delimiter">}</span>
+<a name="L185"></a><span id="L185" class="LineNr">185 </span><span class="Delimiter">}</span>
+<a name="L186"></a><span id="L186" class="LineNr">186 </span>
+<a name="L187"></a><span id="L187" class="LineNr">187 </span><span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span>reagent&amp; r<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L188"></a><span id="L188" class="LineNr">188 </span>  expand_type_abbreviations<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
+<a name="L189"></a><span id="L189" class="LineNr">189 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>r<span class="Delimiter">)</span> || is_dummy<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L190"></a><span id="L190" class="LineNr">190 </span>  reagent rcopy = r<span class="Delimiter">;</span>
+<a name="L191"></a><span id="L191" class="LineNr">191 </span>  <span class="Comment">// Compute Container Size(reagent rcopy)</span>
+<a name="L192"></a><span id="L192" class="LineNr">192 </span>  set&lt;type_tree&gt; pending_metadata<span class="Delimiter">;</span>  <span class="Comment">// might actually be faster to just convert to string rather than compare type_tree directly; so far the difference is negligible</span>
+<a name="L193"></a><span id="L193" class="LineNr">193 </span>  compute_container_sizes<span class="Delimiter">(</span>rcopy<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
+<a name="L194"></a><span id="L194" class="LineNr">194 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> rcopy<span class="Delimiter">.</span>type<span class="Delimiter">))</span>
+<a name="L195"></a><span id="L195" class="LineNr">195 </span>    r<span class="Delimiter">.</span>metadata = get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> rcopy<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
+<a name="L196"></a><span id="L196" class="LineNr">196 </span><span class="Delimiter">}</span>
+<a name="L197"></a><span id="L197" class="LineNr">197 </span>
+<a name="L198"></a><span id="L198" class="LineNr">198 </span><span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> set&lt;type_tree&gt;&amp; pending_metadata<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L199"></a><span id="L199" class="LineNr">199 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L200"></a><span id="L200" class="LineNr">200 </span>  trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;compute container sizes for &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L201"></a><span id="L201" class="LineNr">201 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> type<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L202"></a><span id="L202" class="LineNr">202 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>pending_metadata<span class="Delimiter">,</span> *type<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L203"></a><span id="L203" class="LineNr">203 </span>  pending_metadata<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>*type<span class="Delimiter">);</span>
+<a name="L204"></a><span id="L204" class="LineNr">204 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L205"></a><span id="L205" class="LineNr">205 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L206"></a><span id="L206" class="LineNr">206 </span>      raise &lt;&lt; <span class="Constant">&quot;invalid type &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>type<span class="Delimiter">)</span> &lt;&lt; location_for_error_messages &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L207"></a><span id="L207" class="LineNr">207 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L208"></a><span id="L208" class="LineNr">208 </span>    <span class="Delimiter">}</span>
+<a name="L209"></a><span id="L209" class="LineNr">209 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;address&quot;</span><span class="Delimiter">)</span>
+<a name="L210"></a><span id="L210" class="LineNr">210 </span>      compute_container_sizes<span class="Delimiter">(</span>payload_type<span class="Delimiter">(</span>type<span class="Delimiter">),</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
+<a name="L211"></a><span id="L211" class="LineNr">211 </span>    <span class="Comment">// End compute_container_sizes Non-atom Special-cases</span>
+<a name="L212"></a><span id="L212" class="LineNr">212 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L213"></a><span id="L213" class="LineNr">213 </span>  <span class="Delimiter">}</span>
+<a name="L214"></a><span id="L214" class="LineNr">214 </span>  assert<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
+<a name="L215"></a><span id="L215" class="LineNr">215 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</span>
+<a name="L216"></a><span id="L216" class="LineNr">216 </span>  type_info&amp; info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
+<a name="L217"></a><span id="L217" class="LineNr">217 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">)</span>
+<a name="L218"></a><span id="L218" class="LineNr">218 </span>    compute_container_sizes<span class="Delimiter">(</span>info<span class="Delimiter">,</span> type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
+<a name="L219"></a><span id="L219" class="LineNr">219 </span>  <span class="Comment">// End compute_container_sizes Atom Special-cases</span>
+<a name="L220"></a><span id="L220" class="LineNr">220 </span><span class="Delimiter">}</span>
+<a name="L221"></a><span id="L221" class="LineNr">221 </span>
+<a name="L222"></a><span id="L222" class="LineNr">222 </span><span class="Normal">void</span> compute_container_sizes<span class="Delimiter">(</span><span class="Normal">const</span> type_info&amp; container_info<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* full_type<span class="Delimiter">,</span> set&lt;type_tree&gt;&amp; pending_metadata<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L223"></a><span id="L223" class="LineNr">223 </span>  assert<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">);</span>
+<a name="L224"></a><span id="L224" class="LineNr">224 </span>  <span class="Comment">// size of a container is the sum of the sizes of its element</span>
+<a name="L225"></a><span id="L225" class="LineNr">225 </span>  <span class="Comment">// (So it can only contain arrays if they're static and include their</span>
+<a name="L226"></a><span id="L226" class="LineNr">226 </span>  <span class="Comment">// length in the type.)</span>
+<a name="L227"></a><span id="L227" class="LineNr">227 </span>  container_metadata metadata<span class="Delimiter">;</span>
+<a name="L228"></a><span id="L228" class="LineNr">228 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>elements<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L229"></a><span id="L229" class="LineNr">229 </span>    reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = container_info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+<a name="L230"></a><span id="L230" class="LineNr">230 </span>    <span class="Comment">// Compute Container Size(element, full_type)</span>
+<a name="L231"></a><span id="L231" class="LineNr">231 </span>    compute_container_sizes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">,</span> pending_metadata<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">);</span>
+<a name="L232"></a><span id="L232" class="LineNr">232 </span>    metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">);</span>  <span class="Comment">// save previous size as offset</span>
+<a name="L233"></a><span id="L233" class="LineNr">233 </span>    metadata<span class="Delimiter">.</span>size += size_of<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
+<a name="L234"></a><span id="L234" class="LineNr">234 </span>  <span class="Delimiter">}</span>
+<a name="L235"></a><span id="L235" class="LineNr">235 </span>  Container_metadata<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt;<span class="Delimiter">(</span><span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*full_type<span class="Delimiter">),</span> metadata<span class="Delimiter">));</span>
+<a name="L236"></a><span id="L236" class="LineNr">236 </span><span class="Delimiter">}</span>
+<a name="L237"></a><span id="L237" class="LineNr">237 </span>
+<a name="L238"></a><span id="L238" class="LineNr">238 </span><span class="Normal">const</span> type_tree* payload_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L239"></a><span id="L239" class="LineNr">239 </span>  assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
+<a name="L240"></a><span id="L240" class="LineNr">240 </span>  <span class="Normal">const</span> type_tree* result = type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">;</span>
+<a name="L241"></a><span id="L241" class="LineNr">241 </span>  assert<span class="Delimiter">(</span>!result<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">);</span>
+<a name="L242"></a><span id="L242" class="LineNr">242 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!result<span class="Delimiter">-&gt;</span>right<span class="Delimiter">)</span> <span class="Identifier">return</span> result<span class="Delimiter">-&gt;</span>left<span class="Delimiter">;</span>
+<a name="L243"></a><span id="L243" class="LineNr">243 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
+<a name="L244"></a><span id="L244" class="LineNr">244 </span><span class="Delimiter">}</span>
+<a name="L245"></a><span id="L245" class="LineNr">245 </span>
+<a name="L246"></a><span id="L246" class="LineNr">246 </span>container_metadata&amp; get<span class="Delimiter">(</span>vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt;&amp; all<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* key<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L247"></a><span id="L247" class="LineNr">247 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>all<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L248"></a><span id="L248" class="LineNr">248 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>matches<span class="Delimiter">(</span>all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">,</span> key<span class="Delimiter">))</span>
+<a name="L249"></a><span id="L249" class="LineNr">249 </span>      <span class="Identifier">return</span> all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">;</span>
+<a name="L250"></a><span id="L250" class="LineNr">250 </span>  <span class="Delimiter">}</span>
+<a name="L251"></a><span id="L251" class="LineNr">251 </span>  tb_shutdown<span class="Delimiter">();</span>
+<a name="L252"></a><span id="L252" class="LineNr">252 </span>  raise &lt;&lt; <span class="Constant">&quot;unknown size for type '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>key<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L253"></a><span id="L253" class="LineNr">253 </span>  assert<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">);</span>
+<a name="L254"></a><span id="L254" class="LineNr">254 </span><span class="Delimiter">}</span>
+<a name="L255"></a><span id="L255" class="LineNr">255 </span>
+<a name="L256"></a><span id="L256" class="LineNr">256 </span><span class="Normal">bool</span> contains_key<span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;pair&lt;type_tree*<span class="Delimiter">,</span> container_metadata&gt; &gt;&amp; all<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* key<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L257"></a><span id="L257" class="LineNr">257 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>all<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L258"></a><span id="L258" class="LineNr">258 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>matches<span class="Delimiter">(</span>all<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first<span class="Delimiter">,</span> key<span class="Delimiter">))</span>
+<a name="L259"></a><span id="L259" class="LineNr">259 </span>      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
+<a name="L260"></a><span id="L260" class="LineNr">260 </span>  <span class="Delimiter">}</span>
+<a name="L261"></a><span id="L261" class="LineNr">261 </span>  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
+<a name="L262"></a><span id="L262" class="LineNr">262 </span><span class="Delimiter">}</span>
+<a name="L263"></a><span id="L263" class="LineNr">263 </span>
+<a name="L264"></a><span id="L264" class="LineNr">264 </span><span class="Normal">bool</span> matches<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* a<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L265"></a><span id="L265" class="LineNr">265 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>a == b<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
+<a name="L266"></a><span id="L266" class="LineNr">266 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!a || !b<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
+<a name="L267"></a><span id="L267" class="LineNr">267 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>atom != b<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
+<a name="L268"></a><span id="L268" class="LineNr">268 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Identifier">return</span> a<span class="Delimiter">-&gt;</span>value == b<span class="Delimiter">-&gt;</span>value<span class="Delimiter">;</span>
+<a name="L269"></a><span id="L269" class="LineNr">269 </span>  <span class="Identifier">return</span> matches<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>left<span class="Delimiter">)</span> &amp;&amp; matches<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>right<span class="Delimiter">);</span>
+<a name="L270"></a><span id="L270" class="LineNr">270 </span><span class="Delimiter">}</span>
+<a name="L271"></a><span id="L271" class="LineNr">271 </span>
+<a name="L272"></a><span id="L272" class="LineNr">272 </span><span class="Delimiter">:(scenario stash_container)</span>
+<a name="L273"></a><span id="L273" class="LineNr">273 </span><span class="muRecipe">def</span> main [
+<a name="L274"></a><span id="L274" class="LineNr">274 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># first</span>
+<a name="L275"></a><span id="L275" class="LineNr">275 </span>  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L276"></a><span id="L276" class="LineNr">276 </span>  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L277"></a><span id="L277" class="LineNr">277 </span>  stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:point-number/<span class="Special">raw</span>
+<a name="L278"></a><span id="L278" class="LineNr">278 </span>]
+<a name="L279"></a><span id="L279" class="LineNr">279 </span><span class="traceContains">+app: foo: 34 35 36</span>
+<a name="L280"></a><span id="L280" class="LineNr">280 </span>
+<a name="L281"></a><span id="L281" class="LineNr">281 </span><span class="Comment">//: for the following unit tests we'll do the work of the transform by hand</span>
+<a name="L282"></a><span id="L282" class="LineNr">282 </span>
+<a name="L283"></a><span id="L283" class="LineNr">283 </span><span class="Delimiter">:(before &quot;End Unit Tests&quot;)</span>
+<a name="L284"></a><span id="L284" class="LineNr">284 </span><span class="Normal">void</span> test_container_sizes<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L285"></a><span id="L285" class="LineNr">285 </span>  <span class="Comment">// a container we don't have the size for</span>
+<a name="L286"></a><span id="L286" class="LineNr">286 </span>  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
+<a name="L287"></a><span id="L287" class="LineNr">287 </span>  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L288"></a><span id="L288" class="LineNr">288 </span>  <span class="Comment">// scan</span>
+<a name="L289"></a><span id="L289" class="LineNr">289 </span>  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
+<a name="L290"></a><span id="L290" class="LineNr">290 </span>  <span class="Comment">// the reagent we scanned knows its size</span>
+<a name="L291"></a><span id="L291" class="LineNr">291 </span>  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L292"></a><span id="L292" class="LineNr">292 </span>  <span class="Comment">// the global table also knows its size</span>
+<a name="L293"></a><span id="L293" class="LineNr">293 </span>  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L294"></a><span id="L294" class="LineNr">294 </span>  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L295"></a><span id="L295" class="LineNr">295 </span><span class="Delimiter">}</span>
+<a name="L296"></a><span id="L296" class="LineNr">296 </span>
+<a name="L297"></a><span id="L297" class="LineNr">297 </span><span class="Normal">void</span> test_container_sizes_through_aliases<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L298"></a><span id="L298" class="LineNr">298 </span>  <span class="Comment">// a new alias for a container</span>
+<a name="L299"></a><span id="L299" class="LineNr">299 </span>  put<span class="Delimiter">(</span>Type_abbreviations<span class="Delimiter">,</span> <span class="Constant">&quot;pt&quot;</span><span class="Delimiter">,</span> new_type_tree<span class="Delimiter">(</span><span class="Constant">&quot;point&quot;</span><span class="Delimiter">));</span>
+<a name="L300"></a><span id="L300" class="LineNr">300 </span>  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:pt&quot;</span><span class="Delimiter">);</span>
+<a name="L301"></a><span id="L301" class="LineNr">301 </span>  <span class="Comment">// scan</span>
+<a name="L302"></a><span id="L302" class="LineNr">302 </span>  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
+<a name="L303"></a><span id="L303" class="LineNr">303 </span>  <span class="Comment">// the reagent we scanned knows its size</span>
+<a name="L304"></a><span id="L304" class="LineNr">304 </span>  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L305"></a><span id="L305" class="LineNr">305 </span>  <span class="Comment">// the global table also knows its size</span>
+<a name="L306"></a><span id="L306" class="LineNr">306 </span>  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L307"></a><span id="L307" class="LineNr">307 </span>  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L308"></a><span id="L308" class="LineNr">308 </span><span class="Delimiter">}</span>
+<a name="L309"></a><span id="L309" class="LineNr">309 </span>
+<a name="L310"></a><span id="L310" class="LineNr">310 </span><span class="Normal">void</span> test_container_sizes_nested<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L311"></a><span id="L311" class="LineNr">311 </span>  <span class="Comment">// a container we don't have the size for</span>
+<a name="L312"></a><span id="L312" class="LineNr">312 </span>  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:point-number&quot;</span><span class="Delimiter">);</span>
+<a name="L313"></a><span id="L313" class="LineNr">313 </span>  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L314"></a><span id="L314" class="LineNr">314 </span>  <span class="Comment">// scan</span>
+<a name="L315"></a><span id="L315" class="LineNr">315 </span>  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
+<a name="L316"></a><span id="L316" class="LineNr">316 </span>  <span class="Comment">// the reagent we scanned knows its size</span>
+<a name="L317"></a><span id="L317" class="LineNr">317 </span>  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">3</span><span class="Delimiter">);</span>
+<a name="L318"></a><span id="L318" class="LineNr">318 </span>  <span class="Comment">// the global table also knows its size</span>
+<a name="L319"></a><span id="L319" class="LineNr">319 </span>  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L320"></a><span id="L320" class="LineNr">320 </span>  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> r<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">3</span><span class="Delimiter">);</span>
+<a name="L321"></a><span id="L321" class="LineNr">321 </span><span class="Delimiter">}</span>
+<a name="L322"></a><span id="L322" class="LineNr">322 </span>
+<a name="L323"></a><span id="L323" class="LineNr">323 </span><span class="Normal">void</span> test_container_sizes_recursive<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L324"></a><span id="L324" class="LineNr">324 </span>  <span class="Comment">// define a container containing an address to itself</span>
+<a name="L325"></a><span id="L325" class="LineNr">325 </span>  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L326"></a><span id="L326" class="LineNr">326 </span>      <span class="Constant">&quot;  x:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L327"></a><span id="L327" class="LineNr">327 </span>      <span class="Constant">&quot;  y:address:foo</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L328"></a><span id="L328" class="LineNr">328 </span>      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
+<a name="L329"></a><span id="L329" class="LineNr">329 </span>  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:foo&quot;</span><span class="Delimiter">);</span>
+<a name="L330"></a><span id="L330" class="LineNr">330 </span>  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
+<a name="L331"></a><span id="L331" class="LineNr">331 </span>  CHECK_EQ<span class="Delimiter">(</span>r<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L332"></a><span id="L332" class="LineNr">332 </span><span class="Delimiter">}</span>
+<a name="L333"></a><span id="L333" class="LineNr">333 </span>
+<a name="L334"></a><span id="L334" class="LineNr">334 </span><span class="Normal">void</span> test_container_sizes_from_address<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L335"></a><span id="L335" class="LineNr">335 </span>  <span class="Comment">// a container we don't have the size for</span>
+<a name="L336"></a><span id="L336" class="LineNr">336 </span>  reagent container<span class="Delimiter">(</span><span class="Constant">&quot;x:point&quot;</span><span class="Delimiter">);</span>
+<a name="L337"></a><span id="L337" class="LineNr">337 </span>  CHECK<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L338"></a><span id="L338" class="LineNr">338 </span>  <span class="Comment">// scanning an address to the container precomputes the size of the container</span>
+<a name="L339"></a><span id="L339" class="LineNr">339 </span>  reagent r<span class="Delimiter">(</span><span class="Constant">&quot;x:address:point&quot;</span><span class="Delimiter">);</span>
+<a name="L340"></a><span id="L340" class="LineNr">340 </span>  compute_container_sizes<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
+<a name="L341"></a><span id="L341" class="LineNr">341 </span>  CHECK<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">));</span>
+<a name="L342"></a><span id="L342" class="LineNr">342 </span>  CHECK_EQ<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Container_metadata<span class="Delimiter">,</span> container<span class="Delimiter">.</span>type<span class="Delimiter">).</span>size<span class="Delimiter">,</span> <span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L343"></a><span id="L343" class="LineNr">343 </span><span class="Delimiter">}</span>
+<a name="L344"></a><span id="L344" class="LineNr">344 </span>
+<a name="L345"></a><span id="L345" class="LineNr">345 </span><span class="SalientComment">//:: To access elements of a container, use 'get'</span>
+<a name="L346"></a><span id="L346" class="LineNr">346 </span><span class="Comment">//: 'get' takes a 'base' container and an 'offset' into it and returns the</span>
+<a name="L347"></a><span id="L347" class="LineNr">347 </span><span class="Comment">//: appropriate element of the container value.</span>
+<a name="L348"></a><span id="L348" class="LineNr">348 </span>
+<a name="L349"></a><span id="L349" class="LineNr">349 </span><span class="Delimiter">:(scenario get)</span>
+<a name="L350"></a><span id="L350" class="LineNr">350 </span><span class="muRecipe">def</span> main [
+<a name="L351"></a><span id="L351" class="LineNr">351 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L352"></a><span id="L352" class="LineNr">352 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L353"></a><span id="L353" class="LineNr">353 </span>  <span class="Constant">15</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
+<a name="L354"></a><span id="L354" class="LineNr">354 </span>]
+<a name="L355"></a><span id="L355" class="LineNr">355 </span><span class="traceContains">+mem: storing 35 in location 15</span>
+<a name="L356"></a><span id="L356" class="LineNr">356 </span>
+<a name="L357"></a><span id="L357" class="LineNr">357 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
+<a name="L358"></a><span id="L358" class="LineNr">358 </span>GET<span class="Delimiter">,</span>
+<a name="L359"></a><span id="L359" class="LineNr">359 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
+<a name="L360"></a><span id="L360" class="LineNr">360 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;get&quot;</span><span class="Delimiter">,</span> GET<span class="Delimiter">);</span>
+<a name="L361"></a><span id="L361" class="LineNr">361 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
+<a name="L362"></a><span id="L362" class="LineNr">362 </span><span class="Normal">case</span> GET: <span class="Delimiter">{</span>
+<a name="L363"></a><span id="L363" class="LineNr">363 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L364"></a><span id="L364" class="LineNr">364 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get' expects exactly 2 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L365"></a><span id="L365" class="LineNr">365 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L366"></a><span id="L366" class="LineNr">366 </span>  <span class="Delimiter">}</span>
+<a name="L367"></a><span id="L367" class="LineNr">367 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>  <span class="Comment">// new copy for every invocation</span>
+<a name="L368"></a><span id="L368" class="LineNr">368 </span>  <span class="Comment">// Update GET base in Check</span>
+<a name="L369"></a><span id="L369" class="LineNr">369 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L370"></a><span id="L370" class="LineNr">370 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L371"></a><span id="L371" class="LineNr">371 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L372"></a><span id="L372" class="LineNr">372 </span>  <span class="Delimiter">}</span>
+<a name="L373"></a><span id="L373" class="LineNr">373 </span>  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
+<a name="L374"></a><span id="L374" class="LineNr">374 </span>  <span class="Comment">// Update GET base_type in Check</span>
+<a name="L375"></a><span id="L375" class="LineNr">375 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_type<span class="Delimiter">-&gt;</span>atom || base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L376"></a><span id="L376" class="LineNr">376 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'get' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L377"></a><span id="L377" class="LineNr">377 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L378"></a><span id="L378" class="LineNr">378 </span>  <span class="Delimiter">}</span>
+<a name="L379"></a><span id="L379" class="LineNr">379 </span>  <span class="Normal">const</span> reagent&amp; offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+<a name="L380"></a><span id="L380" class="LineNr">380 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L381"></a><span id="L381" class="LineNr">381 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'get' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L382"></a><span id="L382" class="LineNr">382 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L383"></a><span id="L383" class="LineNr">383 </span>  <span class="Delimiter">}</span>
+<a name="L384"></a><span id="L384" class="LineNr">384 </span>  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L385"></a><span id="L385" class="LineNr">385 </span>  <span class="Comment">//: later layers will permit non-integer offsets</span>
+<a name="L386"></a><span id="L386" class="LineNr">386 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span>
+<a name="L387"></a><span id="L387" class="LineNr">387 </span>    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
+<a name="L388"></a><span id="L388" class="LineNr">388 </span>  <span class="Normal">else</span>
+<a name="L389"></a><span id="L389" class="LineNr">389 </span>    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
+<a name="L390"></a><span id="L390" class="LineNr">390 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L391"></a><span id="L391" class="LineNr">391 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset '&quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot;' for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L392"></a><span id="L392" class="LineNr">392 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L393"></a><span id="L393" class="LineNr">393 </span>  <span class="Delimiter">}</span>
+<a name="L394"></a><span id="L394" class="LineNr">394 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L395"></a><span id="L395" class="LineNr">395 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L396"></a><span id="L396" class="LineNr">396 </span>  <span class="Comment">// Update GET product in Check</span>
+<a name="L397"></a><span id="L397" class="LineNr">397 </span>  <span class="Comment">//: use base.type rather than base_type because later layers will introduce compound types</span>
+<a name="L398"></a><span id="L398" class="LineNr">398 </span>  <span class="Normal">const</span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset_value<span class="Delimiter">);</span>
+<a name="L399"></a><span id="L399" class="LineNr">399 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span> element<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L400"></a><span id="L400" class="LineNr">400 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'get &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but '&quot;</span> &lt;&lt; product<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;' has type &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>product<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L401"></a><span id="L401" class="LineNr">401 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L402"></a><span id="L402" class="LineNr">402 </span>  <span class="Delimiter">}</span>
+<a name="L403"></a><span id="L403" class="LineNr">403 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L404"></a><span id="L404" class="LineNr">404 </span><span class="Delimiter">}</span>
+<a name="L405"></a><span id="L405" class="LineNr">405 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
+<a name="L406"></a><span id="L406" class="LineNr">406 </span><span class="Normal">case</span> GET: <span class="Delimiter">{</span>
+<a name="L407"></a><span id="L407" class="LineNr">407 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L408"></a><span id="L408" class="LineNr">408 </span>  <span class="Comment">// Update GET base in Run</span>
+<a name="L409"></a><span id="L409" class="LineNr">409 </span>  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
+<a name="L410"></a><span id="L410" class="LineNr">410 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L411"></a><span id="L411" class="LineNr">411 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L412"></a><span id="L412" class="LineNr">412 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L413"></a><span id="L413" class="LineNr">413 </span>  <span class="Delimiter">}</span>
+<a name="L414"></a><span id="L414" class="LineNr">414 </span>  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
+<a name="L415"></a><span id="L415" class="LineNr">415 </span>  <span class="Comment">// Update GET base_type in Run</span>
+<a name="L416"></a><span id="L416" class="LineNr">416 </span>  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L417"></a><span id="L417" class="LineNr">417 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
+<a name="L418"></a><span id="L418" class="LineNr">418 </span>  assert<span class="Delimiter">(</span>base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>size<span class="Delimiter">);</span>
+<a name="L419"></a><span id="L419" class="LineNr">419 </span>  <span class="Normal">int</span> src = base_address + base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
+<a name="L420"></a><span id="L420" class="LineNr">420 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy is &quot;</span> &lt;&lt; src &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L421"></a><span id="L421" class="LineNr">421 </span>  <span class="Comment">//: use base.type rather than base_type because later layers will introduce compound types</span>
+<a name="L422"></a><span id="L422" class="LineNr">422 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset<span class="Delimiter">);</span>
+<a name="L423"></a><span id="L423" class="LineNr">423 </span>  element<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>src<span class="Delimiter">);</span>
+<a name="L424"></a><span id="L424" class="LineNr">424 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;its type is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L425"></a><span id="L425" class="LineNr">425 </span>  <span class="Comment">// Read element</span>
+<a name="L426"></a><span id="L426" class="LineNr">426 </span>  products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>element<span class="Delimiter">));</span>
+<a name="L427"></a><span id="L427" class="LineNr">427 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L428"></a><span id="L428" class="LineNr">428 </span><span class="Delimiter">}</span>
+<a name="L429"></a><span id="L429" class="LineNr">429 </span>
+<a name="L430"></a><span id="L430" class="LineNr">430 </span><span class="Delimiter">:(code)</span>
+<a name="L431"></a><span id="L431" class="LineNr">431 </span><span class="Normal">const</span> reagent element_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">int</span> offset_value<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L432"></a><span id="L432" class="LineNr">432 </span>  assert<span class="Delimiter">(</span>offset_value &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L433"></a><span id="L433" class="LineNr">433 </span>  <span class="Normal">const</span> type_tree* base_type = type<span class="Delimiter">;</span>
+<a name="L434"></a><span id="L434" class="LineNr">434 </span>  <span class="Comment">// Update base_type in element_type</span>
+<a name="L435"></a><span id="L435" class="LineNr">435 </span>  assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">));</span>
+<a name="L436"></a><span id="L436" class="LineNr">436 </span>  assert<span class="Delimiter">(</span>!get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
+<a name="L437"></a><span id="L437" class="LineNr">437 </span>  <span class="Normal">const</span> type_info&amp; info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">);</span>
+<a name="L438"></a><span id="L438" class="LineNr">438 </span>  assert<span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind == CONTAINER<span class="Delimiter">);</span>
+<a name="L439"></a><span id="L439" class="LineNr">439 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &gt;= SIZE<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">))</span> <span class="Identifier">return</span> reagent<span class="Delimiter">();</span>  <span class="Comment">// error handled elsewhere</span>
+<a name="L440"></a><span id="L440" class="LineNr">440 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> element = info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset_value<span class="Delimiter">);</span>
+<a name="L441"></a><span id="L441" class="LineNr">441 </span>  <span class="Comment">// End element_type Special-cases</span>
+<a name="L442"></a><span id="L442" class="LineNr">442 </span>  <span class="Identifier">return</span> element<span class="Delimiter">;</span>
+<a name="L443"></a><span id="L443" class="LineNr">443 </span><span class="Delimiter">}</span>
+<a name="L444"></a><span id="L444" class="LineNr">444 </span>
+<a name="L445"></a><span id="L445" class="LineNr">445 </span><span class="Delimiter">:(scenario get_handles_nested_container_elements)</span>
+<a name="L446"></a><span id="L446" class="LineNr">446 </span><span class="muRecipe">def</span> main [
+<a name="L447"></a><span id="L447" class="LineNr">447 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L448"></a><span id="L448" class="LineNr">448 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L449"></a><span id="L449" class="LineNr">449 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L450"></a><span id="L450" class="LineNr">450 </span>  <span class="Constant">15</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
+<a name="L451"></a><span id="L451" class="LineNr">451 </span>]
+<a name="L452"></a><span id="L452" class="LineNr">452 </span><span class="traceContains">+mem: storing 36 in location 15</span>
+<a name="L453"></a><span id="L453" class="LineNr">453 </span>
+<a name="L454"></a><span id="L454" class="LineNr">454 </span><span class="Delimiter">:(scenario get_out_of_bounds)</span>
+<a name="L455"></a><span id="L455" class="LineNr">455 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L456"></a><span id="L456" class="LineNr">456 </span><span class="muRecipe">def</span> main [
+<a name="L457"></a><span id="L457" class="LineNr">457 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L458"></a><span id="L458" class="LineNr">458 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L459"></a><span id="L459" class="LineNr">459 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L460"></a><span id="L460" class="LineNr">460 </span>  get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2:offset</span>  <span class="Comment"># point-number occupies 3 locations but has only 2 fields; out of bounds</span>
+<a name="L461"></a><span id="L461" class="LineNr">461 </span>]
+<a name="L462"></a><span id="L462" class="LineNr">462 </span><span class="traceContains">+error: main: invalid offset '2' for 'point-number'</span>
+<a name="L463"></a><span id="L463" class="LineNr">463 </span>
+<a name="L464"></a><span id="L464" class="LineNr">464 </span><span class="Delimiter">:(scenario get_out_of_bounds_2)</span>
+<a name="L465"></a><span id="L465" class="LineNr">465 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L466"></a><span id="L466" class="LineNr">466 </span><span class="muRecipe">def</span> main [
+<a name="L467"></a><span id="L467" class="LineNr">467 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L468"></a><span id="L468" class="LineNr">468 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L469"></a><span id="L469" class="LineNr">469 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L470"></a><span id="L470" class="LineNr">470 </span>  get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">-1:offset</span>
+<a name="L471"></a><span id="L471" class="LineNr">471 </span>]
+<a name="L472"></a><span id="L472" class="LineNr">472 </span><span class="traceContains">+error: main: invalid offset '-1' for 'point-number'</span>
+<a name="L473"></a><span id="L473" class="LineNr">473 </span>
+<a name="L474"></a><span id="L474" class="LineNr">474 </span><span class="Delimiter">:(scenario get_product_type_mismatch)</span>
+<a name="L475"></a><span id="L475" class="LineNr">475 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L476"></a><span id="L476" class="LineNr">476 </span><span class="muRecipe">def</span> main [
+<a name="L477"></a><span id="L477" class="LineNr">477 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L478"></a><span id="L478" class="LineNr">478 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L479"></a><span id="L479" class="LineNr">479 </span>  <span class="Constant">14</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
+<a name="L480"></a><span id="L480" class="LineNr">480 </span>  <span class="Constant">15</span>:address:num<span class="Special"> &lt;- </span>get <span class="Constant">12</span>:point-number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>
+<a name="L481"></a><span id="L481" class="LineNr">481 </span>]
+<a name="L482"></a><span id="L482" class="LineNr">482 </span><span class="traceContains">+error: main: 'get 12:point-number/raw, 1:offset' should write to number but '15' has type (address number)</span>
+<a name="L483"></a><span id="L483" class="LineNr">483 </span>
+<a name="L484"></a><span id="L484" class="LineNr">484 </span><span class="Comment">//: we might want to call 'get' without saving the results, say in a sandbox</span>
+<a name="L485"></a><span id="L485" class="LineNr">485 </span>
+<a name="L486"></a><span id="L486" class="LineNr">486 </span><span class="Delimiter">:(scenario get_without_product)</span>
+<a name="L487"></a><span id="L487" class="LineNr">487 </span><span class="muRecipe">def</span> main [
+<a name="L488"></a><span id="L488" class="LineNr">488 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L489"></a><span id="L489" class="LineNr">489 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L490"></a><span id="L490" class="LineNr">490 </span>  get <span class="Constant">12</span>:point/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">1:offset</span>  <span class="Comment"># unsafe</span>
+<a name="L491"></a><span id="L491" class="LineNr">491 </span>]
+<a name="L492"></a><span id="L492" class="LineNr">492 </span><span class="Comment"># just don't die</span>
+<a name="L493"></a><span id="L493" class="LineNr">493 </span>
+<a name="L494"></a><span id="L494" class="LineNr">494 </span><span class="SalientComment">//:: To write to elements of containers, use 'put'.</span>
+<a name="L495"></a><span id="L495" class="LineNr">495 </span>
+<a name="L496"></a><span id="L496" class="LineNr">496 </span><span class="Delimiter">:(scenario put)</span>
+<a name="L497"></a><span id="L497" class="LineNr">497 </span><span class="muRecipe">def</span> main [
+<a name="L498"></a><span id="L498" class="LineNr">498 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L499"></a><span id="L499" class="LineNr">499 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L500"></a><span id="L500" class="LineNr">500 </span>  $clear-trace
+<a name="L501"></a><span id="L501" class="LineNr">501 </span>  <span class="Constant">12</span>:point<span class="Special"> &lt;- </span>put <span class="Constant">12</span>:point<span class="Delimiter">,</span> <span class="Constant">1:offset</span><span class="Delimiter">,</span> <span class="Constant">36</span>
+<a name="L502"></a><span id="L502" class="LineNr">502 </span>]
+<a name="L503"></a><span id="L503" class="LineNr">503 </span><span class="traceContains">+mem: storing 36 in location 13</span>
+<a name="L504"></a><span id="L504" class="LineNr">504 </span><span class="traceAbsent">-mem: storing 34 in location 12</span>
+<a name="L505"></a><span id="L505" class="LineNr">505 </span>
+<a name="L506"></a><span id="L506" class="LineNr">506 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
+<a name="L507"></a><span id="L507" class="LineNr">507 </span>PUT<span class="Delimiter">,</span>
+<a name="L508"></a><span id="L508" class="LineNr">508 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
+<a name="L509"></a><span id="L509" class="LineNr">509 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;put&quot;</span><span class="Delimiter">,</span> PUT<span class="Delimiter">);</span>
+<a name="L510"></a><span id="L510" class="LineNr">510 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
+<a name="L511"></a><span id="L511" class="LineNr">511 </span><span class="Normal">case</span> PUT: <span class="Delimiter">{</span>
+<a name="L512"></a><span id="L512" class="LineNr">512 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">3</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L513"></a><span id="L513" class="LineNr">513 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'put' expects exactly 3 ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L514"></a><span id="L514" class="LineNr">514 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L515"></a><span id="L515" class="LineNr">515 </span>  <span class="Delimiter">}</span>
+<a name="L516"></a><span id="L516" class="LineNr">516 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L517"></a><span id="L517" class="LineNr">517 </span>  <span class="Comment">// Update PUT base in Check</span>
+<a name="L518"></a><span id="L518" class="LineNr">518 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!base<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L519"></a><span id="L519" class="LineNr">519 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'put' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L520"></a><span id="L520" class="LineNr">520 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L521"></a><span id="L521" class="LineNr">521 </span>  <span class="Delimiter">}</span>
+<a name="L522"></a><span id="L522" class="LineNr">522 </span>  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
+<a name="L523"></a><span id="L523" class="LineNr">523 </span>  <span class="Comment">// Update PUT base_type in Check</span>
+<a name="L524"></a><span id="L524" class="LineNr">524 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!base_type<span class="Delimiter">-&gt;</span>atom || base_type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>kind != CONTAINER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L525"></a><span id="L525" class="LineNr">525 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;first ingredient of 'put' should be a container, but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L526"></a><span id="L526" class="LineNr">526 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L527"></a><span id="L527" class="LineNr">527 </span>  <span class="Delimiter">}</span>
+<a name="L528"></a><span id="L528" class="LineNr">528 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> offset = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+<a name="L529"></a><span id="L529" class="LineNr">529 </span>  <span class="Comment">// Update PUT offset in Check</span>
+<a name="L530"></a><span id="L530" class="LineNr">530 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>offset<span class="Delimiter">)</span> || !is_mu_scalar<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L531"></a><span id="L531" class="LineNr">531 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;second ingredient of 'put' should have type 'offset', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L532"></a><span id="L532" class="LineNr">532 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L533"></a><span id="L533" class="LineNr">533 </span>  <span class="Delimiter">}</span>
+<a name="L534"></a><span id="L534" class="LineNr">534 </span>  <span class="Normal">int</span> offset_value = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L535"></a><span id="L535" class="LineNr">535 </span>  <span class="Comment">//: later layers will permit non-integer offsets</span>
+<a name="L536"></a><span id="L536" class="LineNr">536 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L537"></a><span id="L537" class="LineNr">537 </span>    offset_value = to_integer<span class="Delimiter">(</span>offset<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
+<a name="L538"></a><span id="L538" class="LineNr">538 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>offset_value &lt; <span class="Constant">0</span> || offset_value &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L539"></a><span id="L539" class="LineNr">539 </span>      raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;invalid offset '&quot;</span> &lt;&lt; offset_value &lt;&lt; <span class="Constant">&quot;' for '&quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L540"></a><span id="L540" class="LineNr">540 </span>      <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L541"></a><span id="L541" class="LineNr">541 </span>    <span class="Delimiter">}</span>
+<a name="L542"></a><span id="L542" class="LineNr">542 </span>  <span class="Delimiter">}</span>
+<a name="L543"></a><span id="L543" class="LineNr">543 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
+<a name="L544"></a><span id="L544" class="LineNr">544 </span>    offset_value = offset<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
+<a name="L545"></a><span id="L545" class="LineNr">545 </span>  <span class="Delimiter">}</span>
+<a name="L546"></a><span id="L546" class="LineNr">546 </span>  <span class="Normal">const</span> reagent&amp; value = inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L547"></a><span id="L547" class="LineNr">547 </span>  <span class="Comment">//: use base.type rather than base_type because later layers will introduce compound types</span>
+<a name="L548"></a><span id="L548" class="LineNr">548 </span>  <span class="Normal">const</span> reagent&amp; element = element_type<span class="Delimiter">(</span>base<span class="Delimiter">.</span>type<span class="Delimiter">,</span> offset_value<span class="Delimiter">);</span>
+<a name="L549"></a><span id="L549" class="LineNr">549 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>element<span class="Delimiter">,</span> value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L550"></a><span id="L550" class="LineNr">550 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'put &quot;</span> &lt;&lt; base<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;, &quot;</span> &lt;&lt; offset<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' should write to &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>element<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but '&quot;</span> &lt;&lt; value<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;' has type &quot;</span> &lt;&lt; names_to_string_without_quotes<span class="Delimiter">(</span>value<span class="Delimiter">.</span>type<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L551"></a><span id="L551" class="LineNr">551 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L552"></a><span id="L552" class="LineNr">552 </span>  <span class="Delimiter">}</span>
+<a name="L553"></a><span id="L553" class="LineNr">553 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// no more checks necessary</span>
+<a name="L554"></a><span id="L554" class="LineNr">554 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name != inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L555"></a><span id="L555" class="LineNr">555 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;product of 'put' must be first ingredient '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;', but got '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L556"></a><span id="L556" class="LineNr">556 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L557"></a><span id="L557" class="LineNr">557 </span>  <span class="Delimiter">}</span>
+<a name="L558"></a><span id="L558" class="LineNr">558 </span>  <span class="Comment">// End PUT Product Checks</span>
+<a name="L559"></a><span id="L559" class="LineNr">559 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L560"></a><span id="L560" class="LineNr">560 </span><span class="Delimiter">}</span>
+<a name="L561"></a><span id="L561" class="LineNr">561 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
+<a name="L562"></a><span id="L562" class="LineNr">562 </span><span class="Normal">case</span> PUT: <span class="Delimiter">{</span>
+<a name="L563"></a><span id="L563" class="LineNr">563 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> base = current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L564"></a><span id="L564" class="LineNr">564 </span>  <span class="Comment">// Update PUT base in Run</span>
+<a name="L565"></a><span id="L565" class="LineNr">565 </span>  <span class="Normal">int</span> base_address = base<span class="Delimiter">.</span>value<span class="Delimiter">;</span>
+<a name="L566"></a><span id="L566" class="LineNr">566 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>base_address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L567"></a><span id="L567" class="LineNr">567 </span>    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;tried to access location 0 in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L568"></a><span id="L568" class="LineNr">568 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L569"></a><span id="L569" class="LineNr">569 </span>  <span class="Delimiter">}</span>
+<a name="L570"></a><span id="L570" class="LineNr">570 </span>  <span class="Normal">const</span> type_tree* base_type = base<span class="Delimiter">.</span>type<span class="Delimiter">;</span>
+<a name="L571"></a><span id="L571" class="LineNr">571 </span>  <span class="Comment">// Update PUT base_type in Run</span>
+<a name="L572"></a><span id="L572" class="LineNr">572 </span>  <span class="Normal">int</span> offset = ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+<a name="L573"></a><span id="L573" class="LineNr">573 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>offset &lt; <span class="Constant">0</span> || offset &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// copied from Check above</span>
+<a name="L574"></a><span id="L574" class="LineNr">574 </span>  <span class="Normal">int</span> address = base_address + base<span class="Delimiter">.</span>metadata<span class="Delimiter">.</span>offset<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">);</span>
+<a name="L575"></a><span id="L575" class="LineNr">575 </span>  trace<span class="Delimiter">(</span><span class="Constant">9998</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;address to copy to is &quot;</span> &lt;&lt; address &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L576"></a><span id="L576" class="LineNr">576 </span>  <span class="Comment">// optimization: directly write the element rather than updating 'product'</span>
+<a name="L577"></a><span id="L577" class="LineNr">577 </span>  <span class="Comment">// and writing the entire container</span>
+<a name="L578"></a><span id="L578" class="LineNr">578 </span>  <span class="Comment">// Write Memory in PUT in Run</span>
+<a name="L579"></a><span id="L579" class="LineNr">579 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">));</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L580"></a><span id="L580" class="LineNr">580 </span>    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;mem&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;storing &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot; in location &quot;</span> &lt;&lt; address+i &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L581"></a><span id="L581" class="LineNr">581 </span>    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address+i<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
+<a name="L582"></a><span id="L582" class="LineNr">582 </span>  <span class="Delimiter">}</span>
+<a name="L583"></a><span id="L583" class="LineNr">583 </span>  <span class="Identifier">goto</span> finish_instruction<span class="Delimiter">;</span>
+<a name="L584"></a><span id="L584" class="LineNr">584 </span><span class="Delimiter">}</span>
+<a name="L585"></a><span id="L585" class="LineNr">585 </span>
+<a name="L586"></a><span id="L586" class="LineNr">586 </span><span class="Delimiter">:(scenario put_product_error)</span>
+<a name="L587"></a><span id="L587" class="LineNr">587 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L588"></a><span id="L588" class="LineNr">588 </span><span class="muRecipe">def</span> main [
+<a name="L589"></a><span id="L589" class="LineNr">589 </span>  local-scope
+<a name="L590"></a><span id="L590" class="LineNr">590 </span>  load-ingredients
+<a name="L591"></a><span id="L591" class="LineNr">591 </span>  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">35</span>
+<a name="L592"></a><span id="L592" class="LineNr">592 </span>  <span class="Constant">3</span>:point<span class="Special"> &lt;- </span>put <span class="Constant">1</span>:point<span class="Delimiter">,</span> <span class="Constant">x:offset</span><span class="Delimiter">,</span> <span class="Constant">36</span>
+<a name="L593"></a><span id="L593" class="LineNr">593 </span>]
+<a name="L594"></a><span id="L594" class="LineNr">594 </span><span class="traceContains">+error: main: product of 'put' must be first ingredient '1:point', but got '3:point'</span>
+<a name="L595"></a><span id="L595" class="LineNr">595 </span>
+<a name="L596"></a><span id="L596" class="LineNr">596 </span><span class="SalientComment">//:: Allow containers to be defined in Mu code.</span>
+<a name="L597"></a><span id="L597" class="LineNr">597 </span>
+<a name="L598"></a><span id="L598" class="LineNr">598 </span><span class="Delimiter">:(scenarios load)</span>
+<a name="L599"></a><span id="L599" class="LineNr">599 </span><span class="Delimiter">:(scenario container)</span>
+<a name="L600"></a><span id="L600" class="LineNr">600 </span><span class="muData">container</span> foo [
+<a name="L601"></a><span id="L601" class="LineNr">601 </span>  <span class="Normal">x</span>:num
+<a name="L602"></a><span id="L602" class="LineNr">602 </span>  <span class="Normal">y</span>:num
+<a name="L603"></a><span id="L603" class="LineNr">603 </span>]
+<a name="L604"></a><span id="L604" class="LineNr">604 </span><span class="traceContains">+parse: --- defining container foo</span>
+<a name="L605"></a><span id="L605" class="LineNr">605 </span><span class="traceContains">+parse: element: {x: &quot;number&quot;}</span>
+<a name="L606"></a><span id="L606" class="LineNr">606 </span><span class="traceContains">+parse: element: {y: &quot;number&quot;}</span>
+<a name="L607"></a><span id="L607" class="LineNr">607 </span>
+<a name="L608"></a><span id="L608" class="LineNr">608 </span><span class="Delimiter">:(scenario container_use_before_definition)</span>
+<a name="L609"></a><span id="L609" class="LineNr">609 </span><span class="muData">container</span> foo [
+<a name="L610"></a><span id="L610" class="LineNr">610 </span>  <span class="Normal">x</span>:num
+<a name="L611"></a><span id="L611" class="LineNr">611 </span>  <span class="Normal">y</span>:bar
+<a name="L612"></a><span id="L612" class="LineNr">612 </span>]
+<a name="L613"></a><span id="L613" class="LineNr">613 </span><span class="muData">container</span> bar [
+<a name="L614"></a><span id="L614" class="LineNr">614 </span>  <span class="Normal">x</span>:num
+<a name="L615"></a><span id="L615" class="LineNr">615 </span>  <span class="Normal">y</span>:num
+<a name="L616"></a><span id="L616" class="LineNr">616 </span>]
+<a name="L617"></a><span id="L617" class="LineNr">617 </span><span class="traceContains">+parse: --- defining container foo</span>
+<a name="L618"></a><span id="L618" class="LineNr">618 </span><span class="traceContains">+parse: type number: 1000</span>
+<a name="L619"></a><span id="L619" class="LineNr">619 </span><span class="traceContains">+parse:   element: {x: &quot;number&quot;}</span>
+<a name="L620"></a><span id="L620" class="LineNr">620 </span><span class="Comment"># todo: brittle</span>
+<a name="L621"></a><span id="L621" class="LineNr">621 </span><span class="Comment"># type bar is unknown at this point, but we assign it a number</span>
+<a name="L622"></a><span id="L622" class="LineNr">622 </span><span class="traceContains">+parse:   element: {y: &quot;bar&quot;}</span>
+<a name="L623"></a><span id="L623" class="LineNr">623 </span><span class="Comment"># later type bar geon</span>
+<a name="L624"></a><span id="L624" class="LineNr">624 </span><span class="traceContains">+parse: --- defining container bar</span>
+<a name="L625"></a><span id="L625" class="LineNr">625 </span><span class="traceContains">+parse: type number: 1001</span>
+<a name="L626"></a><span id="L626" class="LineNr">626 </span><span class="traceContains">+parse:   element: {x: &quot;number&quot;}</span>
+<a name="L627"></a><span id="L627" class="LineNr">627 </span><span class="traceContains">+parse:   element: {y: &quot;number&quot;}</span>
+<a name="L628"></a><span id="L628" class="LineNr">628 </span>
+<a name="L629"></a><span id="L629" class="LineNr">629 </span><span class="Comment">//: if a container is defined again, the new fields add to the original definition</span>
+<a name="L630"></a><span id="L630" class="LineNr">630 </span><span class="Delimiter">:(scenarios run)</span>
+<a name="L631"></a><span id="L631" class="LineNr">631 </span><span class="Delimiter">:(scenario container_extend)</span>
+<a name="L632"></a><span id="L632" class="LineNr">632 </span><span class="muData">container</span> foo [
+<a name="L633"></a><span id="L633" class="LineNr">633 </span>  <span class="Normal">x</span>:num
+<a name="L634"></a><span id="L634" class="LineNr">634 </span>]
+<a name="L635"></a><span id="L635" class="LineNr">635 </span><span class="Comment"># add to previous definition</span>
+<a name="L636"></a><span id="L636" class="LineNr">636 </span><span class="muData">container</span> foo [
+<a name="L637"></a><span id="L637" class="LineNr">637 </span>  <span class="Normal">y</span>:num
+<a name="L638"></a><span id="L638" class="LineNr">638 </span>]
+<a name="L639"></a><span id="L639" class="LineNr">639 </span><span class="muRecipe">def</span> main [
+<a name="L640"></a><span id="L640" class="LineNr">640 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L641"></a><span id="L641" class="LineNr">641 </span>  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
+<a name="L642"></a><span id="L642" class="LineNr">642 </span>  <span class="Constant">3</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
+<a name="L643"></a><span id="L643" class="LineNr">643 </span>  <span class="Constant">4</span>:num<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:foo<span class="Delimiter">,</span> <span class="Constant">1:offset</span>
+<a name="L644"></a><span id="L644" class="LineNr">644 </span>]
+<a name="L645"></a><span id="L645" class="LineNr">645 </span><span class="traceContains">+mem: storing 34 in location 3</span>
+<a name="L646"></a><span id="L646" class="LineNr">646 </span><span class="traceContains">+mem: storing 35 in location 4</span>
+<a name="L647"></a><span id="L647" class="LineNr">647 </span>
+<a name="L648"></a><span id="L648" class="LineNr">648 </span><span class="Delimiter">:(before &quot;End Command Handlers&quot;)</span>
+<a name="L649"></a><span id="L649" class="LineNr">649 </span><span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>command == <span class="Constant">&quot;container&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L650"></a><span id="L650" class="LineNr">650 </span>  insert_container<span class="Delimiter">(</span>command<span class="Delimiter">,</span> CONTAINER<span class="Delimiter">,</span> in<span class="Delimiter">);</span>
+<a name="L651"></a><span id="L651" class="LineNr">651 </span><span class="Delimiter">}</span>
+<a name="L652"></a><span id="L652" class="LineNr">652 </span>
+<a name="L653"></a><span id="L653" class="LineNr">653 </span><span class="Comment">//: Even though we allow containers to be extended, we don't allow this after</span>
+<a name="L654"></a><span id="L654" class="LineNr">654 </span><span class="Comment">//: a call to transform_all. But we do want to detect this situation and raise</span>
+<a name="L655"></a><span id="L655" class="LineNr">655 </span><span class="Comment">//: an error. This field will help us raise such errors.</span>
+<a name="L656"></a><span id="L656" class="LineNr">656 </span><span class="Delimiter">:(before &quot;End type_info Fields&quot;)</span>
+<a name="L657"></a><span id="L657" class="LineNr">657 </span><span class="Normal">int</span> Num_calls_to_transform_all_at_first_definition<span class="Delimiter">;</span>
+<a name="L658"></a><span id="L658" class="LineNr">658 </span><span class="Delimiter">:(before &quot;End type_info Constructor&quot;)</span>
+<a name="L659"></a><span id="L659" class="LineNr">659 </span>Num_calls_to_transform_all_at_first_definition = -<span class="Constant">1</span><span class="Delimiter">;</span>
+<a name="L660"></a><span id="L660" class="LineNr">660 </span>
+<a name="L661"></a><span id="L661" class="LineNr">661 </span><span class="Delimiter">:(code)</span>
+<a name="L662"></a><span id="L662" class="LineNr">662 </span><span class="Normal">void</span> insert_container<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; command<span class="Delimiter">,</span> kind_of_type kind<span class="Delimiter">,</span> istream&amp; in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L663"></a><span id="L663" class="LineNr">663 </span>  skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+<a name="L664"></a><span id="L664" class="LineNr">664 </span>  string name = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+<a name="L665"></a><span id="L665" class="LineNr">665 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
+<a name="L666"></a><span id="L666" class="LineNr">666 </span>    assert<span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">));</span>
+<a name="L667"></a><span id="L667" class="LineNr">667 </span>    raise &lt;&lt; <span class="Constant">&quot;incomplete container definition at end of file (0)</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L668"></a><span id="L668" class="LineNr">668 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L669"></a><span id="L669" class="LineNr">669 </span>  <span class="Delimiter">}</span>
+<a name="L670"></a><span id="L670" class="LineNr">670 </span>  <span class="Comment">// End container Name Refinements</span>
+<a name="L671"></a><span id="L671" class="LineNr">671 </span>  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- defining &quot;</span> &lt;&lt; command &lt;&lt; <span class="Constant">' '</span> &lt;&lt; name &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L672"></a><span id="L672" class="LineNr">672 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span>
+<a name="L673"></a><span id="L673" class="LineNr">673 </span>      || get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L674"></a><span id="L674" class="LineNr">674 </span>    put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
+<a name="L675"></a><span id="L675" class="LineNr">675 </span>  <span class="Delimiter">}</span>
+<a name="L676"></a><span id="L676" class="LineNr">676 </span>  trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;type number: &quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L677"></a><span id="L677" class="LineNr">677 </span>  skip_bracket<span class="Delimiter">(</span>in<span class="Delimiter">,</span> <span class="Constant">&quot;'&quot;</span>+command+<span class="Constant">&quot;' must begin with '['&quot;</span><span class="Delimiter">);</span>
+<a name="L678"></a><span id="L678" class="LineNr">678 </span>  type_info&amp; info = get_or_insert<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> name<span class="Delimiter">));</span>
+<a name="L679"></a><span id="L679" class="LineNr">679 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L680"></a><span id="L680" class="LineNr">680 </span>    <span class="Comment">// initial definition of this container</span>
+<a name="L681"></a><span id="L681" class="LineNr">681 </span>    info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition = Num_calls_to_transform_all<span class="Delimiter">;</span>
+<a name="L682"></a><span id="L682" class="LineNr">682 </span>  <span class="Delimiter">}</span>
+<a name="L683"></a><span id="L683" class="LineNr">683 </span>  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>Num_calls_to_transform_all_at_first_definition != Num_calls_to_transform_all<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L684"></a><span id="L684" class="LineNr">684 </span>    <span class="Comment">// extension after transform_all</span>
+<a name="L685"></a><span id="L685" class="LineNr">685 </span>    raise &lt;&lt; <span class="Constant">&quot;there was a call to transform_all() between the definition of container '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' and a subsequent extension. This is not supported, since any recipes that used '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' values have already been transformed and </span><span class="cSpecial">\&quot;</span><span class="Constant">frozen</span><span class="cSpecial">\&quot;</span><span class="Constant">.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L686"></a><span id="L686" class="LineNr">686 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L687"></a><span id="L687" class="LineNr">687 </span>  <span class="Delimiter">}</span>
+<a name="L688"></a><span id="L688" class="LineNr">688 </span>  info<span class="Delimiter">.</span>name = name<span class="Delimiter">;</span>
+<a name="L689"></a><span id="L689" class="LineNr">689 </span>  info<span class="Delimiter">.</span>kind = kind<span class="Delimiter">;</span>
+<a name="L690"></a><span id="L690" class="LineNr">690 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L691"></a><span id="L691" class="LineNr">691 </span>    skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+<a name="L692"></a><span id="L692" class="LineNr">692 </span>    string element = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+<a name="L693"></a><span id="L693" class="LineNr">693 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>element<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
+<a name="L694"></a><span id="L694" class="LineNr">694 </span>      assert<span class="Delimiter">(</span>!has_data<span class="Delimiter">(</span>in<span class="Delimiter">));</span>
+<a name="L695"></a><span id="L695" class="LineNr">695 </span>      raise &lt;&lt; <span class="Constant">&quot;incomplete container definition at end of file (1)</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L696"></a><span id="L696" class="LineNr">696 </span>      <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L697"></a><span id="L697" class="LineNr">697 </span>    <span class="Delimiter">}</span>
+<a name="L698"></a><span id="L698" class="LineNr">698 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>element == <span class="Constant">&quot;]&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L699"></a><span id="L699" class="LineNr">699 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L700"></a><span id="L700" class="LineNr">700 </span>      raise &lt;&lt; command &lt;&lt; <span class="Constant">&quot; '&quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot;' contains multiple elements on a single line. Containers and exclusive containers must only contain elements, one to a line, no code.</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L701"></a><span id="L701" class="LineNr">701 </span>      <span class="Comment">// skip rest of container declaration</span>
+<a name="L702"></a><span id="L702" class="LineNr">702 </span>      <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L703"></a><span id="L703" class="LineNr">703 </span>        skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+<a name="L704"></a><span id="L704" class="LineNr">704 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>next_word<span class="Delimiter">(</span>in<span class="Delimiter">)</span> == <span class="Constant">&quot;]&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L705"></a><span id="L705" class="LineNr">705 </span>      <span class="Delimiter">}</span>
+<a name="L706"></a><span id="L706" class="LineNr">706 </span>      <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L707"></a><span id="L707" class="LineNr">707 </span>    <span class="Delimiter">}</span>
+<a name="L708"></a><span id="L708" class="LineNr">708 </span>    info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>element<span class="Delimiter">));</span>
+<a name="L709"></a><span id="L709" class="LineNr">709 </span>    expand_type_abbreviations<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">);</span>  <span class="Comment">// todo: use abbreviation before declaration</span>
+<a name="L710"></a><span id="L710" class="LineNr">710 </span>    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">().</span>type<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
+<a name="L711"></a><span id="L711" class="LineNr">711 </span>    trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;parse&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;  element: &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>back<span class="Delimiter">())</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L712"></a><span id="L712" class="LineNr">712 </span>    <span class="Comment">// End Load Container Element Definition</span>
+<a name="L713"></a><span id="L713" class="LineNr">713 </span>  <span class="Delimiter">}</span>
+<a name="L714"></a><span id="L714" class="LineNr">714 </span><span class="Delimiter">}</span>
+<a name="L715"></a><span id="L715" class="LineNr">715 </span>
+<a name="L716"></a><span id="L716" class="LineNr">716 </span><span class="Normal">void</span> replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> type_info&amp; info<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L717"></a><span id="L717" class="LineNr">717 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L718"></a><span id="L718" class="LineNr">718 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L719"></a><span id="L719" class="LineNr">719 </span>    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
+<a name="L720"></a><span id="L720" class="LineNr">720 </span>    replace_unknown_types_with_unique_ordinals<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> info<span class="Delimiter">);</span>
+<a name="L721"></a><span id="L721" class="LineNr">721 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L722"></a><span id="L722" class="LineNr">722 </span>  <span class="Delimiter">}</span>
+<a name="L723"></a><span id="L723" class="LineNr">723 </span>  assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
+<a name="L724"></a><span id="L724" class="LineNr">724 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L725"></a><span id="L725" class="LineNr">725 </span>    type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
+<a name="L726"></a><span id="L726" class="LineNr">726 </span>  <span class="Delimiter">}</span>
+<a name="L727"></a><span id="L727" class="LineNr">727 </span>  <span class="Comment">// End insert_container Special-cases</span>
+<a name="L728"></a><span id="L728" class="LineNr">728 </span>  <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>name != <span class="Constant">&quot;-&gt;&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// used in recipe types</span>
+<a name="L729"></a><span id="L729" class="LineNr">729 </span>    put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">,</span> Next_type_ordinal++<span class="Delimiter">);</span>
+<a name="L730"></a><span id="L730" class="LineNr">730 </span>    type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
+<a name="L731"></a><span id="L731" class="LineNr">731 </span>  <span class="Delimiter">}</span>
+<a name="L732"></a><span id="L732" class="LineNr">732 </span><span class="Delimiter">}</span>
+<a name="L733"></a><span id="L733" class="LineNr">733 </span>
+<a name="L734"></a><span id="L734" class="LineNr">734 </span><span class="Normal">void</span> skip_bracket<span class="Delimiter">(</span>istream&amp; in<span class="Delimiter">,</span> string message<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L735"></a><span id="L735" class="LineNr">735 </span>  skip_whitespace_and_comments<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+<a name="L736"></a><span id="L736" class="LineNr">736 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>get<span class="Delimiter">()</span> != <span class="Constant">'['</span><span class="Delimiter">)</span>
+<a name="L737"></a><span id="L737" class="LineNr">737 </span>    raise &lt;&lt; message &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L738"></a><span id="L738" class="LineNr">738 </span><span class="Delimiter">}</span>
+<a name="L739"></a><span id="L739" class="LineNr">739 </span>
+<a name="L740"></a><span id="L740" class="LineNr">740 </span><span class="Delimiter">:(scenario multi_word_line_in_container_declaration)</span>
+<a name="L741"></a><span id="L741" class="LineNr">741 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L742"></a><span id="L742" class="LineNr">742 </span><span class="muData">container</span> foo [
+<a name="L743"></a><span id="L743" class="LineNr">743 </span>  <span class="Normal">x</span>:num y:num
+<a name="L744"></a><span id="L744" class="LineNr">744 </span>]
+<a name="L745"></a><span id="L745" class="LineNr">745 </span><span class="traceContains">+error: container 'foo' contains multiple elements on a single line. Containers and exclusive containers must only contain elements, one to a line, no code.</span>
+<a name="L746"></a><span id="L746" class="LineNr">746 </span>
+<a name="L747"></a><span id="L747" class="LineNr">747 </span><span class="Comment">//: support type abbreviations in container definitions</span>
+<a name="L748"></a><span id="L748" class="LineNr">748 </span>
+<a name="L749"></a><span id="L749" class="LineNr">749 </span><span class="Delimiter">:(scenario type_abbreviations_in_containers)</span>
+<a name="L750"></a><span id="L750" class="LineNr">750 </span><span class="muData">type</span> foo = number
+<a name="L751"></a><span id="L751" class="LineNr">751 </span><span class="muData">container</span> bar [
+<a name="L752"></a><span id="L752" class="LineNr">752 </span>  <span class="Normal">x</span>:foo
+<a name="L753"></a><span id="L753" class="LineNr">753 </span>]
+<a name="L754"></a><span id="L754" class="LineNr">754 </span><span class="muRecipe">def</span> main [
+<a name="L755"></a><span id="L755" class="LineNr">755 </span>  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+<a name="L756"></a><span id="L756" class="LineNr">756 </span>  <span class="Constant">2</span>:foo<span class="Special"> &lt;- </span>get <span class="Constant">1</span>:bar/unsafe<span class="Delimiter">,</span> <span class="Constant">0:offset</span>
+<a name="L757"></a><span id="L757" class="LineNr">757 </span>]
+<a name="L758"></a><span id="L758" class="LineNr">758 </span><span class="traceContains">+mem: storing 34 in location 2</span>
+<a name="L759"></a><span id="L759" class="LineNr">759 </span>
+<a name="L760"></a><span id="L760" class="LineNr">760 </span><span class="Delimiter">:(after &quot;Transform.push_back(expand_type_abbreviations)&quot;)</span>
+<a name="L761"></a><span id="L761" class="LineNr">761 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>expand_type_abbreviations_in_containers<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+<a name="L762"></a><span id="L762" class="LineNr">762 </span><span class="Delimiter">:(code)</span>
+<a name="L763"></a><span id="L763" class="LineNr">763 </span><span class="Comment">// extremely inefficient; we process all types over and over again, once for every single recipe</span>
+<a name="L764"></a><span id="L764" class="LineNr">764 </span><span class="Comment">// but it doesn't seem to cause any noticeable slowdown</span>
+<a name="L765"></a><span id="L765" class="LineNr">765 </span><span class="Normal">void</span> expand_type_abbreviations_in_containers<span class="Delimiter">(</span>unused <span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L766"></a><span id="L766" class="LineNr">766 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt;::iterator p = Type<span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != Type<span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L767"></a><span id="L767" class="LineNr">767 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">.</span>elements<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
+<a name="L768"></a><span id="L768" class="LineNr">768 </span>      expand_type_abbreviations<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
+<a name="L769"></a><span id="L769" class="LineNr">769 </span>  <span class="Delimiter">}</span>
+<a name="L770"></a><span id="L770" class="LineNr">770 </span><span class="Delimiter">}</span>
+<a name="L771"></a><span id="L771" class="LineNr">771 </span>
+<a name="L772"></a><span id="L772" class="LineNr">772 </span><span class="Comment">//: ensure scenarios are consistent by always starting new container</span>
+<a name="L773"></a><span id="L773" class="LineNr">773 </span><span class="Comment">//: declarations at the same type number</span>
+<a name="L774"></a><span id="L774" class="LineNr">774 </span><span class="Delimiter">:(before &quot;End Setup&quot;)</span>  <span class="Comment">//: for tests</span>
+<a name="L775"></a><span id="L775" class="LineNr">775 </span>Next_type_ordinal = <span class="Constant">1000</span><span class="Delimiter">;</span>
+<a name="L776"></a><span id="L776" class="LineNr">776 </span><span class="Delimiter">:(before &quot;End Test Run Initialization&quot;)</span>
+<a name="L777"></a><span id="L777" class="LineNr">777 </span>assert<span class="Delimiter">(</span>Next_type_ordinal &lt; <span class="Constant">1000</span><span class="Delimiter">);</span>
+<a name="L778"></a><span id="L778" class="LineNr">778 </span>
+<a name="L779"></a><span id="L779" class="LineNr">779 </span><span class="Delimiter">:(code)</span>
+<a name="L780"></a><span id="L780" class="LineNr">780 </span><span class="Normal">void</span> test_error_on_transform_all_between_container_definition_and_extension<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L781"></a><span id="L781" class="LineNr">781 </span>  <span class="Comment">// define a container</span>
+<a name="L782"></a><span id="L782" class="LineNr">782 </span>  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L783"></a><span id="L783" class="LineNr">783 </span>      <span class="Constant">&quot;  a:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L784"></a><span id="L784" class="LineNr">784 </span>      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
+<a name="L785"></a><span id="L785" class="LineNr">785 </span>  <span class="Comment">// try to extend the container after transform</span>
+<a name="L786"></a><span id="L786" class="LineNr">786 </span>  transform_all<span class="Delimiter">();</span>
+<a name="L787"></a><span id="L787" class="LineNr">787 </span>  CHECK_TRACE_DOESNT_CONTAIN_ERRORS<span class="Delimiter">();</span>
+<a name="L788"></a><span id="L788" class="LineNr">788 </span>  Hide_errors = <span class="Constant">true</span><span class="Delimiter">;</span>
+<a name="L789"></a><span id="L789" class="LineNr">789 </span>  run<span class="Delimiter">(</span><span class="Constant">&quot;container foo [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L790"></a><span id="L790" class="LineNr">790 </span>      <span class="Constant">&quot;  b:num</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
+<a name="L791"></a><span id="L791" class="LineNr">791 </span>      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
+<a name="L792"></a><span id="L792" class="LineNr">792 </span>  CHECK_TRACE_CONTAINS_ERRORS<span class="Delimiter">();</span>
+<a name="L793"></a><span id="L793" class="LineNr">793 </span><span class="Delimiter">}</span>
+<a name="L794"></a><span id="L794" class="LineNr">794 </span>
+<a name="L795"></a><span id="L795" class="LineNr">795 </span><span class="SalientComment">//:: Allow container definitions anywhere in the codebase, but complain if you</span>
+<a name="L796"></a><span id="L796" class="LineNr">796 </span><span class="SalientComment">//:: can't find a definition at the end.</span>
+<a name="L797"></a><span id="L797" class="LineNr">797 </span>
+<a name="L798"></a><span id="L798" class="LineNr">798 </span><span class="Delimiter">:(scenario run_complains_on_unknown_types)</span>
+<a name="L799"></a><span id="L799" class="LineNr">799 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L800"></a><span id="L800" class="LineNr">800 </span><span class="muRecipe">def</span> main [
+<a name="L801"></a><span id="L801" class="LineNr">801 </span>  <span class="Comment"># integer is not a type</span>
+<a name="L802"></a><span id="L802" class="LineNr">802 </span>  <span class="Constant">1</span>:integer<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
+<a name="L803"></a><span id="L803" class="LineNr">803 </span>]
+<a name="L804"></a><span id="L804" class="LineNr">804 </span><span class="traceContains">+error: main: unknown type integer in '1:integer &lt;- copy 0'</span>
+<a name="L805"></a><span id="L805" class="LineNr">805 </span>
+<a name="L806"></a><span id="L806" class="LineNr">806 </span><span class="Delimiter">:(scenario run_allows_type_definition_after_use)</span>
+<a name="L807"></a><span id="L807" class="LineNr">807 </span><span class="muRecipe">def</span> main [
+<a name="L808"></a><span id="L808" class="LineNr">808 </span>  <span class="Constant">1</span>:bar<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
+<a name="L809"></a><span id="L809" class="LineNr">809 </span>]
+<a name="L810"></a><span id="L810" class="LineNr">810 </span><span class="muData">container</span> bar [
+<a name="L811"></a><span id="L811" class="LineNr">811 </span>  <span class="Normal">x</span>:num
+<a name="L812"></a><span id="L812" class="LineNr">812 </span>]
+<a name="L813"></a><span id="L813" class="LineNr">813 </span>$error: <span class="Constant">0</span>
+<a name="L814"></a><span id="L814" class="LineNr">814 </span>
+<a name="L815"></a><span id="L815" class="LineNr">815 </span><span class="Delimiter">:(before &quot;End Type Modifying Transforms&quot;)</span>
+<a name="L816"></a><span id="L816" class="LineNr">816 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_or_set_invalid_types<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+<a name="L817"></a><span id="L817" class="LineNr">817 </span>
+<a name="L818"></a><span id="L818" class="LineNr">818 </span><span class="Delimiter">:(code)</span>
+<a name="L819"></a><span id="L819" class="LineNr">819 </span><span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L820"></a><span id="L820" class="LineNr">820 </span>  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
+<a name="L821"></a><span id="L821" class="LineNr">821 </span>  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- check for invalid types in recipe &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L822"></a><span id="L822" class="LineNr">822 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>  index &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span>  ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L823"></a><span id="L823" class="LineNr">823 </span>    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
+<a name="L824"></a><span id="L824" class="LineNr">824 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
+<a name="L825"></a><span id="L825" class="LineNr">825 </span>      check_or_set_invalid_types<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> caller<span class="Delimiter">,</span> inst<span class="Delimiter">);</span>
+<a name="L826"></a><span id="L826" class="LineNr">826 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
+<a name="L827"></a><span id="L827" class="LineNr">827 </span>      check_or_set_invalid_types<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> caller<span class="Delimiter">,</span> inst<span class="Delimiter">);</span>
+<a name="L828"></a><span id="L828" class="LineNr">828 </span>  <span class="Delimiter">}</span>
+<a name="L829"></a><span id="L829" class="LineNr">829 </span>  <span class="Comment">// End check_or_set_invalid_types</span>
+<a name="L830"></a><span id="L830" class="LineNr">830 </span><span class="Delimiter">}</span>
+<a name="L831"></a><span id="L831" class="LineNr">831 </span>
+<a name="L832"></a><span id="L832" class="LineNr">832 </span><span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span>reagent&amp; r<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; caller<span class="Delimiter">,</span> <span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L833"></a><span id="L833" class="LineNr">833 </span>  <span class="Comment">// Begin check_or_set_invalid_types(r)</span>
+<a name="L834"></a><span id="L834" class="LineNr">834 </span>  check_or_set_invalid_types<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">),</span> <span class="Constant">&quot;'&quot;</span>+inst<span class="Delimiter">.</span>original_string+<span class="Constant">&quot;'&quot;</span><span class="Delimiter">);</span>
+<a name="L835"></a><span id="L835" class="LineNr">835 </span><span class="Delimiter">}</span>
+<a name="L836"></a><span id="L836" class="LineNr">836 </span>
+<a name="L837"></a><span id="L837" class="LineNr">837 </span><span class="Normal">void</span> check_or_set_invalid_types<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L838"></a><span id="L838" class="LineNr">838 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L839"></a><span id="L839" class="LineNr">839 </span>  <span class="Comment">// End Container Type Checks</span>
+<a name="L840"></a><span id="L840" class="LineNr">840 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L841"></a><span id="L841" class="LineNr">841 </span>    check_or_set_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
+<a name="L842"></a><span id="L842" class="LineNr">842 </span>    check_or_set_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
+<a name="L843"></a><span id="L843" class="LineNr">843 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L844"></a><span id="L844" class="LineNr">844 </span>  <span class="Delimiter">}</span>
+<a name="L845"></a><span id="L845" class="LineNr">845 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L846"></a><span id="L846" class="LineNr">846 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L847"></a><span id="L847" class="LineNr">847 </span>    assert<span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
+<a name="L848"></a><span id="L848" class="LineNr">848 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">))</span>
+<a name="L849"></a><span id="L849" class="LineNr">849 </span>      type<span class="Delimiter">-&gt;</span>value = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
+<a name="L850"></a><span id="L850" class="LineNr">850 </span>    <span class="Normal">else</span>
+<a name="L851"></a><span id="L851" class="LineNr">851 </span>      raise &lt;&lt; location_for_error_messages &lt;&lt; <span class="Constant">&quot;unknown type &quot;</span> &lt;&lt; type<span class="Delimiter">-&gt;</span>name &lt;&lt; <span class="Constant">&quot; in &quot;</span> &lt;&lt; name_for_error_messages &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L852"></a><span id="L852" class="LineNr">852 </span>  <span class="Delimiter">}</span>
+<a name="L853"></a><span id="L853" class="LineNr">853 </span><span class="Delimiter">}</span>
+<a name="L854"></a><span id="L854" class="LineNr">854 </span>
+<a name="L855"></a><span id="L855" class="LineNr">855 </span><span class="Delimiter">:(scenario container_unknown_field)</span>
+<a name="L856"></a><span id="L856" class="LineNr">856 </span><span class="Special">% Hide_errors = true;</span>
+<a name="L857"></a><span id="L857" class="LineNr">857 </span><span class="muData">container</span> foo [
+<a name="L858"></a><span id="L858" class="LineNr">858 </span>  <span class="Normal">x</span>:num
+<a name="L859"></a><span id="L859" class="LineNr">859 </span>  <span class="Normal">y</span>:bar
+<a name="L860"></a><span id="L860" class="LineNr">860 </span>]
+<a name="L861"></a><span id="L861" class="LineNr">861 </span><span class="traceContains">+error: foo: unknown type in y</span>
+<a name="L862"></a><span id="L862" class="LineNr">862 </span>
+<a name="L863"></a><span id="L863" class="LineNr">863 </span><span class="Delimiter">:(scenario read_container_with_bracket_in_comment)</span>
+<a name="L864"></a><span id="L864" class="LineNr">864 </span><span class="muData">container</span> foo [
+<a name="L865"></a><span id="L865" class="LineNr">865 </span>  <span class="Normal">x</span>:num
+<a name="L866"></a><span id="L866" class="LineNr">866 </span>  <span class="Comment"># ']' in comment</span>
+<a name="L867"></a><span id="L867" class="LineNr">867 </span>  <span class="Normal">y</span>:num
+<a name="L868"></a><span id="L868" class="LineNr">868 </span>]
+<a name="L869"></a><span id="L869" class="LineNr">869 </span><span class="traceContains">+parse: --- defining container foo</span>
+<a name="L870"></a><span id="L870" class="LineNr">870 </span><span class="traceContains">+parse: element: {x: &quot;number&quot;}</span>
+<a name="L871"></a><span id="L871" class="LineNr">871 </span><span class="traceContains">+parse: element: {y: &quot;number&quot;}</span>
+<a name="L872"></a><span id="L872" class="LineNr">872 </span>
+<a name="L873"></a><span id="L873" class="LineNr">873 </span><span class="Delimiter">:(scenario container_with_compound_field_type)</span>
+<a name="L874"></a><span id="L874" class="LineNr">874 </span><span class="muData">container</span> foo [
+<a name="L875"></a><span id="L875" class="LineNr">875 </span>  <span class="Delimiter">{</span>x: <span class="Delimiter">(</span>address array <span class="Delimiter">(</span>address array character<span class="Delimiter">))}</span>
+<a name="L876"></a><span id="L876" class="LineNr">876 </span>]
+<a name="L877"></a><span id="L877" class="LineNr">877 </span>$error: <span class="Constant">0</span>
+<a name="L878"></a><span id="L878" class="LineNr">878 </span>
+<a name="L879"></a><span id="L879" class="LineNr">879 </span><span class="Delimiter">:(before &quot;End transform_all&quot;)</span>
+<a name="L880"></a><span id="L880" class="LineNr">880 </span>check_container_field_types<span class="Delimiter">();</span>
+<a name="L881"></a><span id="L881" class="LineNr">881 </span>
+<a name="L882"></a><span id="L882" class="LineNr">882 </span><span class="Delimiter">:(code)</span>
+<a name="L883"></a><span id="L883" class="LineNr">883 </span><span class="Normal">void</span> check_container_field_types<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L884"></a><span id="L884" class="LineNr">884 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;type_ordinal<span class="Delimiter">,</span> type_info&gt;::iterator p = Type<span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != Type<span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L885"></a><span id="L885" class="LineNr">885 </span>    <span class="Normal">const</span> type_info&amp; info = p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">;</span>
+<a name="L886"></a><span id="L886" class="LineNr">886 </span>    <span class="Comment">// Check Container Field Types(info)</span>
+<a name="L887"></a><span id="L887" class="LineNr">887 </span>    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span>
+<a name="L888"></a><span id="L888" class="LineNr">888 </span>      check_invalid_types<span class="Delimiter">(</span>info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>info<span class="Delimiter">.</span>name<span class="Delimiter">),</span> info<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">);</span>
+<a name="L889"></a><span id="L889" class="LineNr">889 </span>  <span class="Delimiter">}</span>
+<a name="L890"></a><span id="L890" class="LineNr">890 </span><span class="Delimiter">}</span>
+<a name="L891"></a><span id="L891" class="LineNr">891 </span>
+<a name="L892"></a><span id="L892" class="LineNr">892 </span><span class="Normal">void</span> check_invalid_types<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; location_for_error_messages<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name_for_error_messages<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L893"></a><span id="L893" class="LineNr">893 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// will throw a more precise error elsewhere</span>
+<a name="L894"></a><span id="L894" class="LineNr">894 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">-&gt;</span>atom<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L895"></a><span id="L895" class="LineNr">895 </span>    check_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
+<a name="L896"></a><span id="L896" class="LineNr">896 </span>    check_invalid_types<span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> location_for_error_messages<span class="Delimiter">,</span> name_for_error_messages<span class="Delimiter">);</span>
+<a name="L897"></a><span id="L897" class="LineNr">897 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L898"></a><span id="L898" class="LineNr">898 </span>  <span class="Delimiter">}</span>
+<a name="L899"></a><span id="L899" class="LineNr">899 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// value 0 = compound types (layer parse_tree) or type ingredients (layer shape_shifting_container)</span>
+<a name="L900"></a><span id="L900" class="LineNr">900 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">))</span>
+<a name="L901"></a><span id="L901" class="LineNr">901 </span>      raise &lt;&lt; location_for_error_messages &lt;&lt; <span class="Constant">&quot;unknown type in &quot;</span> &lt;&lt; name_for_error_messages &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
+<a name="L902"></a><span id="L902" class="LineNr">902 </span>  <span class="Delimiter">}</span>
+<a name="L903"></a><span id="L903" class="LineNr">903 </span><span class="Delimiter">}</span>
 </pre>
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