2996

author: Kartik K. Agaram <vc@akkartik.com> 2016-05-21 17:44:53 -0700
committer: Kartik K. Agaram <vc@akkartik.com> 2016-05-21 17:44:53 -0700
commit: 2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7 (patch)
tree: 7c2e8b6e37ae3201dc01e90bcb390ee60b7f4a77 /html/053recipe_header.cc.html
parent: 61c025b11ed4ddd002f09f061fd77c75d8b6d0ba (diff)
download: mu-2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7.tar.gz
1 files changed, 533 insertions, 0 deletions
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<title>Mu - 053recipe_header.cc</title>
+<meta name="Generator" content="Vim/7.4">
+<meta name="plugin-version" content="vim7.4_v2">
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+body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
+* { font-size: 12pt; font-size: 1em; }
+.Constant { color: #00a0a0; }
+.traceAbsent { color: #c00000; }
+.cSpecial { color: #008000; }
+.traceContains { color: #008000; }
+.SalientComment { color: #00ffff; }
+.Comment { color: #9090ff; }
+.Delimiter { color: #800080; }
+.Special { color: #c00000; }
+.Identifier { color: #fcb165; }
+.Normal { color: #eeeeee; background-color: #080808; padding-bottom: 1px; }
+.Error { color: #ffffff; background-color: #ff6060; padding-bottom: 1px; }
+-->
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+
+<script type='text/javascript'>
+<!--
+
+-->
+</script>
+</head>
+<body>
+<pre id='vimCodeElement'>
+<span class="Comment">//: Advanced notation for the common/easy case where a recipe takes some fixed</span>
+<span class="Comment">//: number of ingredients and yields some fixed number of products.</span>
+
+<span class="Delimiter">:(scenario recipe_with_header)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  <span class="Normal">z</span>:number<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Comment">//: When loading recipes save any header.</span>
+
+<span class="Delimiter">:(before &quot;End recipe Fields&quot;)</span>
+<span class="Normal">bool</span> has_header<span class="Delimiter">;</span>
+vector&lt;reagent&gt; ingredients<span class="Delimiter">;</span>
+vector&lt;reagent&gt; products<span class="Delimiter">;</span>
+<span class="Delimiter">:(before &quot;End recipe Constructor&quot;)</span>
+has_header = <span class="Constant">false</span><span class="Delimiter">;</span>
+
+<span class="Delimiter">:(before &quot;End Recipe Refinements&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="Constant">'['</span><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;recipe has a header; parsing&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+  load_recipe_header<span class="Delimiter">(</span>in<span class="Delimiter">,</span> result<span class="Delimiter">);</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> load_recipe_header<span class="Delimiter">(</span>istream&amp; in<span class="Delimiter">,</span> recipe&amp; result<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  result<span class="Delimiter">.</span>has_header = <span class="Constant">true</span><span class="Delimiter">;</span>
+  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">)</span> &amp;&amp; in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="Constant">'['</span> &amp;&amp; in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    string s = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">&quot;&lt;-&quot;</span><span class="Delimiter">)</span>
+      raise &lt;&lt; <span class="Constant">&quot;recipe &quot;</span> &lt;&lt; result<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; should say '-&gt;' and not '&lt;-'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">&quot;-&gt;&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+    result<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>s<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;header ingredient: &quot;</span> &lt;&lt; result<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>back<span class="Delimiter">().</span>original_string &lt;&lt; end<span class="Delimiter">();</span>
+    skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>in<span class="Delimiter">)</span> &amp;&amp; in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="Constant">'['</span> &amp;&amp; in<span class="Delimiter">.</span>peek<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    string s = next_word<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+    result<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>reagent<span class="Delimiter">(</span>s<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;header product: &quot;</span> &lt;&lt; result<span class="Delimiter">.</span>products<span class="Delimiter">.</span>back<span class="Delimiter">().</span>original_string &lt;&lt; end<span class="Delimiter">();</span>
+    skip_whitespace_but_not_newline<span class="Delimiter">(</span>in<span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment">// End Load Recipe Header(result)</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(scenario recipe_handles_stray_comma)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number<span class="Delimiter">,</span> [
+  local-scope
+  load-ingredients
+  <span class="Normal">z</span>:number<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Delimiter">:(scenario recipe_handles_stray_comma_2)</span>
+def main [
+  foo
+]
+def foo<span class="Delimiter">,</span> [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add <span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">2</span>
+]
+def bar [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add <span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">3</span>
+]
+<span class="traceContains">+mem: storing 4 in location 1</span>
+
+<span class="Delimiter">:(scenario recipe_handles_wrong_arrow)</span>
+<span class="Special">% Hide_errors = true;</span>
+def foo a:number<span class="Special"> &lt;- </span>b:number [
+]
+<span class="traceContains">+error: recipe foo should say '-&gt;' and not '&lt;-'</span>
+
+<span class="Delimiter">:(scenario recipe_handles_missing_bracket)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main
+<span class="Error">]</span>
+<span class="traceContains">+error: main: recipe body must begin with '['</span>
+
+<span class="Delimiter">:(scenario recipe_handles_missing_bracket_2)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main
+  local-scope
+  <span class="Delimiter">{</span>
+  <span class="Delimiter">}</span>
+<span class="Error">]</span>
+<span class="Comment"># doesn't overflow line when reading header</span>
+<span class="traceAbsent">-parse: header ingredient: local-scope</span>
+<span class="traceContains">+error: main: recipe body must begin with '['</span>
+
+<span class="Delimiter">:(scenario recipe_handles_missing_bracket_3)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main  <span class="Comment"># comment</span>
+  local-scope
+  <span class="Delimiter">{</span>
+  <span class="Delimiter">}</span>
+<span class="Error">]</span>
+<span class="Comment"># doesn't overflow line when reading header</span>
+<span class="traceAbsent">-parse: header ingredient: local-scope</span>
+<span class="traceContains">+error: main: recipe body must begin with '['</span>
+
+<span class="Delimiter">:(after &quot;Begin debug_string(recipe x)&quot;)</span>
+out &lt;&lt; <span class="Constant">&quot;ingredients:</span><span class="cSpecial">\n</span><span class="Constant">&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>x<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
+  out &lt;&lt; <span class="Constant">&quot;  &quot;</span> &lt;&lt; debug_string<span class="Delimiter">(</span>x<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
+out &lt;&lt; <span class="Constant">&quot;products:</span><span class="cSpecial">\n</span><span class="Constant">&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>x<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
+  out &lt;&lt; <span class="Constant">&quot;  &quot;</span> &lt;&lt; debug_string<span class="Delimiter">(</span>x<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
+
+<span class="Comment">//: If a recipe never mentions any ingredients or products, assume it has a header.</span>
+
+<span class="Delimiter">:(scenario recipe_without_ingredients_or_products_has_header)</span>
+def test [
+  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+]
+<span class="traceContains">+parse: recipe test has a header</span>
+
+<span class="Delimiter">:(before &quot;End Recipe Body(result)&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>!result<span class="Delimiter">.</span>has_header<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  result<span class="Delimiter">.</span>has_header = <span class="Constant">true</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>result<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">const</span> instruction&amp; inst = result<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+    <span class="Normal">if</span> <span class="Delimiter">((</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;reply&quot;</span> &amp;&amp; !inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
+        || <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;return&quot;</span> &amp;&amp; !inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
+        || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;next-ingredient&quot;</span>
+        || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;ingredient&quot;</span>
+        || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;rewind-ingredients&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+      result<span class="Delimiter">.</span>has_header = <span class="Constant">false</span><span class="Delimiter">;</span>
+      <span class="Identifier">break</span><span class="Delimiter">;</span>
+    <span class="Delimiter">}</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">.</span>has_header<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;recipe &quot;</span> &lt;&lt; result<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; has a header&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+<span class="Delimiter">}</span>
+
+<span class="Comment">//: Rewrite 'load-ingredients' to instructions to create all reagents in the header.</span>
+
+<span class="Delimiter">:(before &quot;End Rewrite Instruction(curr, recipe result)&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">.</span>name == <span class="Constant">&quot;load-ingredients&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  curr<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
+  recipe_ordinal op = get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;next-ingredient-without-typechecking&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>result<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    curr<span class="Delimiter">.</span>operation = op<span class="Delimiter">;</span>
+    curr<span class="Delimiter">.</span>name = <span class="Constant">&quot;next-ingredient-without-typechecking&quot;</span><span class="Delimiter">;</span>
+    curr<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>result<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
+    result<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>curr<span class="Delimiter">);</span>
+    curr<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="Comment">//: internal version of next-ingredient; don't call this directly</span>
+<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
+NEXT_INGREDIENT_WITHOUT_TYPECHECKING<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;next-ingredient-without-typechecking&quot;</span><span class="Delimiter">,</span> NEXT_INGREDIENT_WITHOUT_TYPECHECKING<span class="Delimiter">);</span>
+<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
+<span class="Normal">case</span> NEXT_INGREDIENT_WITHOUT_TYPECHECKING: <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> NEXT_INGREDIENT_WITHOUT_TYPECHECKING: <span class="Delimiter">{</span>
+  assert<span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-&gt;</span>calls<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>next_ingredient_to_process &lt; SIZE<span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>ingredient_atoms<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+    products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>
+        current_call<span class="Delimiter">().</span>ingredient_atoms<span class="Delimiter">.</span>at<span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>next_ingredient_to_process<span class="Delimiter">));</span>
+    assert<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>products<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">);</span>  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>  <span class="Comment">// push a new vector</span>
+    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+    ++current_call<span class="Delimiter">().</span>next_ingredient_to_process<span class="Delimiter">;</span>
+  <span class="Delimiter">}</span>
+  <span class="Normal">else</span> <span class="Delimiter">{</span>
+    products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
+    <span class="Comment">// pad the first product with sufficient zeros to match its type</span>
+    <span class="Normal">int</span> size = size_of<span class="Delimiter">(</span>current_instruction<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="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> ++i<span class="Delimiter">)</span>
+      products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="SalientComment">//:: Check all calls against headers.</span>
+
+<span class="Delimiter">:(scenario show_clear_error_on_bad_call)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>foo <span class="Constant">34</span>
+]
+def foo x:point <span class="Delimiter">-&gt;</span> y:number [
+  local-scope
+  load-ingredients
+  <span class="Identifier">return</span> <span class="Constant">35</span>
+]
+<span class="traceContains">+error: main: ingredient 0 has the wrong type at '1:number &lt;- foo 34'</span>
+
+<span class="Delimiter">:(scenario show_clear_error_on_bad_call_2)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Constant">1</span>:point<span class="Special"> &lt;- </span>foo <span class="Constant">34</span>
+]
+def foo x:number <span class="Delimiter">-&gt;</span> y:number [
+  local-scope
+  load-ingredients
+  <span class="Identifier">return</span> x
+]
+<span class="traceContains">+error: main: product 0 has the wrong type at '1:point &lt;- foo 34'</span>
+
+<span class="Delimiter">:(after &quot;Transform.push_back(check_instruction)&quot;)</span>
+Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_calls_against_header<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> check_calls_against_header<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <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;--- type-check calls inside recipe &quot;</span> &lt;&lt; get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name &lt;&lt; end<span class="Delimiter">();</span>
+  <span class="Normal">const</span> recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<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>
+    <span class="Normal">const</span> instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation &lt; MAX_PRIMITIVE_RECIPES<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+    <span class="Normal">const</span> recipe&amp; callee = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>operation<span class="Delimiter">);</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>!callee<span class="Delimiter">.</span>has_header<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>ingredients<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+      <span class="Comment">// ingredients coerced from call to callee</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span>
+        raise &lt;&lt; maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;ingredient &quot;</span> &lt;&lt; i &lt;&lt; <span class="Constant">&quot; has the wrong type at '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<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="Delimiter">}</span>
+    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>callee<span class="Delimiter">.</span>products<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>is_dummy<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="Identifier">continue</span><span class="Delimiter">;</span>
+      <span class="Comment">// products coerced from callee to call</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> callee<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span>
+        raise &lt;&lt; maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;product &quot;</span> &lt;&lt; i &lt;&lt; <span class="Constant">&quot; has the wrong type at '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<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="Delimiter">}</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="SalientComment">//:: Check types going in and out of all recipes with headers.</span>
+
+<span class="Delimiter">:(scenarios transform)</span>
+<span class="Delimiter">:(scenario recipe_headers_are_checked)</span>
+<span class="Special">% Hide_errors = true;</span>
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  <span class="Normal">z</span>:address:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+error: add2: replied with the wrong type at 'return z'</span>
+
+<span class="Delimiter">:(before &quot;End Checks&quot;)</span>
+Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_reply_instructions_against_header<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> check_reply_instructions_against_header<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  <span class="Normal">const</span> recipe&amp; caller_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>!caller_recipe<span class="Delimiter">.</span>has_header<span class="Delimiter">)</span> <span class="Identifier">return</span><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;--- checking reply instructions against header for &quot;</span> &lt;&lt; caller_recipe<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_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">const</span> instruction&amp; inst = caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name != <span class="Constant">&quot;reply&quot;</span> &amp;&amp; inst<span class="Delimiter">.</span>name != <span class="Constant">&quot;return&quot;</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">)</span> != SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+      raise &lt;&lt; maybe<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;replied with the wrong number of products at '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<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">continue</span><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>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>!types_match<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span>
+        raise &lt;&lt; maybe<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;replied with the wrong type at '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<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="Delimiter">}</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(scenario recipe_headers_are_checked_2)</span>
+<span class="Special">% Hide_errors = true;</span>
+def add2 x:number<span class="Delimiter">,</span> y:number [
+  local-scope
+  load-ingredients
+  <span class="Normal">z</span>:address:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+error: add2: replied with the wrong number of products at 'return z'</span>
+
+<span class="Delimiter">:(scenario recipe_headers_check_for_duplicate_names)</span>
+<span class="Special">% Hide_errors = true;</span>
+def add2 x:number<span class="Delimiter">,</span> x:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+error: add2: 'x' can't repeat in the ingredients</span>
+
+<span class="Delimiter">:(before &quot;End recipe Fields&quot;)</span>
+map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt; ingredient_index<span class="Delimiter">;</span>
+
+<span class="Delimiter">:(after &quot;Begin Instruction Modifying Transforms&quot;)</span>
+Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>check_header_ingredients<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> check_header_ingredients<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  recipe&amp; caller_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+  caller_recipe<span class="Delimiter">.</span>ingredient_index<span class="Delimiter">.</span>clear<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;--- checking reply instructions against header for &quot;</span> &lt;&lt; caller_recipe<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_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>ingredient_index<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">))</span>
+      raise &lt;&lt; maybe<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'&quot;</span> &lt;&lt; caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot;' can't repeat in the ingredients</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
+    put<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>ingredient_index<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">,</span> i<span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="Comment">//: Deduce types from the header if possible.</span>
+
+<span class="Delimiter">:(scenarios run)</span>
+<span class="Delimiter">:(scenario deduce_instruction_types_from_recipe_header)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  z<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y  <span class="Comment"># no type for z</span>
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Delimiter">:(after &quot;Begin Type Modifying Transforms&quot;)</span>
+Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>deduce_types_from_header<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> deduce_types_from_header<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  recipe&amp; caller_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><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;--- deduce types from header for &quot;</span> &lt;&lt; caller_recipe<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
+  map&lt;string<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree*&gt; header_type<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_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>!caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// error handled elsewhere</span>
+    put<span class="Delimiter">(</span>header_type<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<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;type of &quot;</span> &lt;&lt; caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> &lt;&lt; end<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>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>!caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// error handled elsewhere</span>
+    put<span class="Delimiter">(</span>header_type<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<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;type of &quot;</span> &lt;&lt; caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> &lt;&lt; end<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>caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    instruction&amp; inst = caller_recipe<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">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;instruction: &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> <span class="Delimiter">{</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>header_type<span class="Delimiter">.</span>find<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">)</span> == header_type<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
+        <span class="Identifier">continue</span><span class="Delimiter">;</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>header_type<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// error handled elsewhere</span>
+      inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*get<span class="Delimiter">(</span>header_type<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<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;type of &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> &lt;&lt; end<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>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</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;  product: &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; end<span class="Delimiter">();</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>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>header_type<span class="Delimiter">.</span>find<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">)</span> == header_type<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
+        <span class="Identifier">continue</span><span class="Delimiter">;</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>header_type<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// error handled elsewhere</span>
+      inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*get<span class="Delimiter">(</span>header_type<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<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;type of &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; is &quot;</span> &lt;&lt; names_to_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+    <span class="Delimiter">}</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="Comment">//: One final convenience: no need to say what to return if the information is</span>
+<span class="Comment">//: in the header.</span>
+
+<span class="Delimiter">:(scenario return_based_on_header)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  z<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y
+  <span class="Identifier">return</span>
+]
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Delimiter">:(after &quot;Transform.push_back(check_header_ingredients)&quot;)</span>
+Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>fill_in_reply_ingredients<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> fill_in_reply_ingredients<span class="Delimiter">(</span>recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  recipe&amp; caller_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>!caller_recipe<span class="Delimiter">.</span>has_header<span class="Delimiter">)</span> <span class="Identifier">return</span><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;--- fill in reply ingredients from header for recipe &quot;</span> &lt;&lt; caller_recipe<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_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    instruction&amp; inst = caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;reply&quot;</span> || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;return&quot;</span><span class="Delimiter">)</span>
+      add_header_products<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment">// fall through reply</span>
+  <span class="Normal">const</span> instruction&amp; final_instruction = caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">);</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>final_instruction<span class="Delimiter">.</span>name != <span class="Constant">&quot;reply&quot;</span> &amp;&amp; final_instruction<span class="Delimiter">.</span>name != <span class="Constant">&quot;return&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    instruction inst<span class="Delimiter">;</span>
+    inst<span class="Delimiter">.</span>name = <span class="Constant">&quot;reply&quot;</span><span class="Delimiter">;</span>
+    add_header_products<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">);</span>
+    caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>inst<span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="Normal">void</span> add_header_products<span class="Delimiter">(</span>instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; caller_recipe<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  assert<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;reply&quot;</span> || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;return&quot;</span><span class="Delimiter">);</span>
+  <span class="Comment">// collect any products with the same names as ingredients</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_recipe<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Comment">// if the ingredient is missing, add it from the header</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> == i<span class="Delimiter">)</span>
+      inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
+    <span class="Comment">// if it's missing /same_as_ingredient, try to fill it in</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>ingredient_index<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &amp;&amp; !has_property<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;same_as_ingredient&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
+      ostringstream same_as_ingredient<span class="Delimiter">;</span>
+      same_as_ingredient &lt;&lt; get<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>ingredient_index<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name<span class="Delimiter">);</span>
+      inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>properties<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;string<span class="Delimiter">,</span> string_tree*&gt;<span class="Delimiter">(</span><span class="Constant">&quot;same-as-ingredient&quot;</span><span class="Delimiter">,</span> <span class="Normal">new</span> string_tree<span class="Delimiter">(</span>same_as_ingredient<span class="Delimiter">.</span>str<span class="Delimiter">())));</span>
+    <span class="Delimiter">}</span>
+  <span class="Delimiter">}</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(scenario explicit_reply_ignores_header)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw</span><span class="Delimiter">,</span> <span class="Constant">2</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 a:number<span class="Delimiter">,</span> b:number <span class="Delimiter">-&gt;</span> y:number<span class="Delimiter">,</span> z:number [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>add a<span class="Delimiter">,</span> b
+  z<span class="Special"> &lt;- </span>subtract a<span class="Delimiter">,</span> b
+  <span class="Identifier">return</span> a<span class="Delimiter">,</span> z
+]
+<span class="traceContains">+mem: storing 3 in location 1</span>
+<span class="traceContains">+mem: storing -2 in location 2</span>
+
+<span class="Delimiter">:(scenario return_on_fallthrough_based_on_header)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  z<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y
+]
+<span class="traceContains">+transform: instruction: reply {z: &quot;number&quot;}</span>
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Delimiter">:(scenario return_on_fallthrough_already_exists)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  z<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y  <span class="Comment"># no type for z</span>
+  <span class="Identifier">return</span> z
+]
+<span class="traceContains">+transform: instruction: return {z: ()}</span>
+<span class="traceAbsent">-transform: instruction: reply z:number</span>
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Delimiter">:(scenario return_after_conditional_reply_based_on_header)</span>
+def main [
+  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>add2 <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> z:number [
+  local-scope
+  load-ingredients
+  z<span class="Special"> &lt;- </span>add x<span class="Delimiter">,</span> y  <span class="Comment"># no type for z</span>
+  <span class="Identifier">return</span>-<span class="Normal">if</span> <span class="Constant">0</span>/<span class="Constant">false</span><span class="Delimiter">,</span> <span class="Constant">34</span>
+]
+<span class="traceContains">+mem: storing 8 in location 1</span>
+
+<span class="Delimiter">:(scenario recipe_headers_perform_same_ingredient_check)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
+  <span class="Constant">3</span>:number<span class="Special"> &lt;- </span>add2 <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number
+]
+def add2 x:number<span class="Delimiter">,</span> y:number <span class="Delimiter">-&gt;</span> x:number [
+  local-scope
+  load-ingredients
+]
+<span class="traceContains">+error: main: '3:number &lt;- add2 1:number, 2:number' should write to '1:number' rather than '3:number'</span>
+
+<span class="Delimiter">:(before &quot;End Includes&quot;)</span>
+<span class="Normal">using</span> std::min<span class="Delimiter">;</span>
+<span class="Normal">using</span> std::max<span class="Delimiter">;</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->
author	Kartik K. Agaram <vc@akkartik.com>	2016-05-21 17:44:53 -0700
committer	Kartik K. Agaram <vc@akkartik.com>	2016-05-21 17:44:53 -0700
commit	2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7 (patch)
tree	7c2e8b6e37ae3201dc01e90bcb390ee60b7f4a77 /html/053recipe_header.cc.html
parent	61c025b11ed4ddd002f09f061fd77c75d8b6d0ba (diff)
download	mu-2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7.tar.gz