3102

author: Kartik K. Agaram <vc@akkartik.com> 2016-07-05 01:08:00 -0700
committer: Kartik K. Agaram <vc@akkartik.com> 2016-07-05 01:08:00 -0700
commit: 298f8065857630e414d84e4ee785a6d17e5f99bb (patch)
tree: 8880a092ab59850a6f821ba892f3904ab464431c /html/070recipe.cc.html
parent: f28f2636c6707e1a33bebacafd0486f4965978ea (diff)
download: mu-298f8065857630e414d84e4ee785a6d17e5f99bb.tar.gz
1 files changed, 288 insertions, 0 deletions
diff --git a/html/070recipe.cc.html b/html/070recipe.cc.html
new file mode 100644
index 00000000..d1901cfb
--- /dev/null
+++ b/html/070recipe.cc.html
@@ -0,0 +1,288 @@
+<!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 - 070recipe.cc</title>
+<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="colorscheme" content="minimal">
+<style type="text/css">
+<!--
+pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
+body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
+* { font-size: 12pt; font-size: 1em; }
+.Constant { color: #00a0a0; }
+.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; }
+-->
+</style>
+
+<script type='text/javascript'>
+<!--
+
+-->
+</script>
+</head>
+<body>
+<pre id='vimCodeElement'>
+<span class="Comment">//: So far we've been calling a fixed recipe in each instruction, but we'd</span>
+<span class="Comment">//: also like to make the recipe a variable, pass recipes to &quot;higher-order&quot;</span>
+<span class="Comment">//: recipes, return recipes from recipes and so on.</span>
+<span class="Comment">//:</span>
+<span class="Comment">//: todo: support storing shape-shifting recipes into recipe variables and calling them</span>
+
+<span class="Delimiter">:(scenario call_literal_recipe)</span>
+def main [
+  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>call f<span class="Delimiter">,</span> <span class="Constant">34</span>
+]
+def f x:number <span class="Delimiter">-&gt;</span> y:number [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+<span class="traceContains">+mem: storing 34 in location 1</span>
+
+<span class="Delimiter">:(scenario call_variable)</span>
+def main [
+  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe number <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)}</span><span class="Special"> &lt;- </span>copy f
+  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>call <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe number <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)},</span> <span class="Constant">34</span>
+]
+def f x:number <span class="Delimiter">-&gt;</span> y:number [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+<span class="traceContains">+mem: storing 34 in location 2</span>
+
+<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
+put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;recipe-literal&quot;</span><span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
+<span class="Comment">// 'recipe' variables can store recipe-literal</span>
+type_ordinal recipe = put<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;recipe&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> recipe<span class="Delimiter">).</span>name = <span class="Constant">&quot;recipe&quot;</span><span class="Delimiter">;</span>
+
+<span class="Delimiter">:(before &quot;End Null-type is_disqualified Exceptions&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>!x<span class="Delimiter">.</span>type &amp;&amp; contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> x<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+  x<span class="Delimiter">.</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span><span class="Constant">&quot;recipe-literal&quot;</span><span class="Delimiter">);</span>
+  x<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> x<span class="Delimiter">.</span>name<span class="Delimiter">));</span>
+  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
+CALL<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;call&quot;</span><span class="Delimiter">,</span> CALL<span class="Delimiter">);</span>
+<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
+<span class="Normal">case</span> CALL: <span class="Delimiter">{</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<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;'call' requires at least one ingredient (the recipe to call)</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>!is_mu_recipe<span class="Delimiter">(</span>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="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 'call' should be a recipe, 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="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> CALL: <span class="Delimiter">{</span>
+  <span class="Comment">// Begin Call</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    ++Trace_stream<span class="Delimiter">-&gt;</span>callstack_depth<span class="Delimiter">;</span>
+    trace<span class="Delimiter">(</span><span class="Constant">&quot;trace&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;indirect 'call': incrementing callstack depth to &quot;</span> &lt;&lt; Trace_stream<span class="Delimiter">-&gt;</span>callstack_depth &lt;&lt; end<span class="Delimiter">();</span>
+    assert<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>callstack_depth &lt; <span class="Constant">9000</span><span class="Delimiter">);</span>  <span class="Comment">// 9998-101 plus cushion</span>
+  <span class="Delimiter">}</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>!ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><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 call empty recipe in '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;'&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> instruction&amp; caller_instruction = current_instruction<span class="Delimiter">();</span>
+  Current_routine<span class="Delimiter">-&gt;</span>calls<span class="Delimiter">.</span>push_front<span class="Delimiter">(</span>call<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
+  ingredients<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>begin<span class="Delimiter">());</span>  <span class="Comment">// drop the callee</span>
+  finish_call_housekeeping<span class="Delimiter">(</span>caller_instruction<span class="Delimiter">,</span> ingredients<span class="Delimiter">);</span>
+  <span class="Identifier">continue</span><span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="SalientComment">//:: check types for 'call' instructions</span>
+
+<span class="Delimiter">:(scenario call_check_literal_recipe)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>call f<span class="Delimiter">,</span> <span class="Constant">34</span>
+]
+def f x:point <span class="Delimiter">-&gt;</span> y:point [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+<span class="traceContains">+error: main: ingredient 0 has the wrong type at '1:number &lt;- call f, 34'</span>
+<span class="traceContains">+error: main: product 0 has the wrong type at '1:number &lt;- call f, 34'</span>
+
+<span class="Delimiter">:(scenario call_check_variable_recipe)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe point <span class="Delimiter">-&gt;</span> point<span class="Delimiter">)}</span><span class="Special"> &lt;- </span>copy f
+  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>call <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe point <span class="Delimiter">-&gt;</span> point<span class="Delimiter">)},</span> <span class="Constant">34</span>
+]
+def f x:point <span class="Delimiter">-&gt;</span> y:point [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+<span class="traceContains">+error: main: ingredient 0 has the wrong type at '2:number &lt;- call {1: (recipe point -&gt; point)}, 34'</span>
+<span class="traceContains">+error: main: product 0 has the wrong type at '2:number &lt;- call {1: (recipe point -&gt; point)}, 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_indirect_calls_against_header<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> check_indirect_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 'call' instructions 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 != CALL<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// error raised above</span>
+    <span class="Normal">const</span> reagent&amp; callee = 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="Normal">if</span> <span class="Delimiter">(</span>!is_mu_recipe<span class="Delimiter">(</span>callee<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// error raised above</span>
+    <span class="Normal">const</span> recipe callee_header = is_literal<span class="Delimiter">(</span>callee<span class="Delimiter">)</span> ? get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> callee<span class="Delimiter">.</span>value<span class="Delimiter">)</span> : from_reagent<span class="Delimiter">(</span>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="Normal">if</span> <span class="Delimiter">(</span>!callee_header<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="Comment">/*</span><span class="Comment">skip callee</span><span class="Comment">*/</span><span class="Constant">1</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_header<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">skip callee</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+      <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>callee_header<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i-<span class="Comment">/*</span><span class="Comment">skip callee</span><span class="Comment">*/</span><span class="Constant">1</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>
+        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-<span class="Comment">/*</span><span class="Comment">skip callee</span><span class="Comment">*/</span><span class="Constant">1</span> &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_header<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="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>callee_header<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<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>
+
+recipe from_reagent<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  assert<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;recipe&quot;</span><span class="Delimiter">);</span>
+  recipe result_header<span class="Delimiter">;</span>  <span class="Comment">// will contain only ingredients and products, nothing else</span>
+  result_header<span class="Delimiter">.</span>has_header = <span class="Constant">true</span><span class="Delimiter">;</span>
+  <span class="Normal">const</span> type_tree* curr = r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">;</span>
+  <span class="Normal">for</span> <span class="Delimiter">(;</span> curr<span class="Delimiter">;</span> curr=curr<span class="Delimiter">-&gt;</span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>curr<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;-&gt;&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+      curr = curr<span class="Delimiter">-&gt;</span>right<span class="Delimiter">;</span>  <span class="Comment">// skip delimiter</span>
+      <span class="Identifier">break</span><span class="Delimiter">;</span>
+    <span class="Delimiter">}</span>
+    result_header<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>next_recipe_reagent<span class="Delimiter">(</span>curr<span class="Delimiter">));</span>
+  <span class="Delimiter">}</span>
+  <span class="Normal">for</span> <span class="Delimiter">(;</span> curr<span class="Delimiter">;</span> curr=curr<span class="Delimiter">-&gt;</span>right<span class="Delimiter">)</span>
+    result_header<span class="Delimiter">.</span>products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>next_recipe_reagent<span class="Delimiter">(</span>curr<span class="Delimiter">));</span>
+  <span class="Identifier">return</span> result_header<span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+reagent next_recipe_reagent<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>!curr<span class="Delimiter">-&gt;</span>left<span class="Delimiter">)</span> <span class="Identifier">return</span> reagent<span class="Delimiter">(</span><span class="Constant">&quot;recipe:&quot;</span>+curr<span class="Delimiter">-&gt;</span>name<span class="Delimiter">);</span>
+  reagent result<span class="Delimiter">;</span>
+  result<span class="Delimiter">.</span>name = <span class="Constant">&quot;recipe&quot;</span><span class="Delimiter">;</span>
+  result<span class="Delimiter">.</span>type = <span class="Normal">new</span> type_tree<span class="Delimiter">(</span>*curr<span class="Delimiter">-&gt;</span>left<span class="Delimiter">);</span>
+  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="Normal">bool</span> is_mu_recipe<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>!r<span class="Delimiter">.</span>type<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>r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;recipe&quot;</span><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>r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;recipe-literal&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
+  <span class="Comment">// End is_mu_recipe Cases</span>
+  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(scenario copy_typecheck_recipe_variable)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Constant">3</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>  <span class="Comment"># abc def</span>
+  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe number <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)}</span><span class="Special"> &lt;- </span>copy f  <span class="Comment"># store literal in a matching variable</span>
+  <span class="Delimiter">{</span><span class="Constant">2</span>: <span class="Delimiter">(</span>recipe boolean <span class="Delimiter">-&gt;</span> boolean<span class="Delimiter">)}</span><span class="Special"> &lt;- </span>copy <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe number <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)}</span>  <span class="Comment"># mismatch between recipe variables</span>
+]
+def f x:number <span class="Delimiter">-&gt;</span> y:number [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+<span class="traceContains">+error: main: can't copy '{1: (recipe number -&gt; number)}' to '{2: (recipe boolean -&gt; boolean)}'; types don't match</span>
+
+<span class="Delimiter">:(scenario copy_typecheck_recipe_variable_2)</span>
+<span class="Special">% Hide_errors = true;</span>
+def main [
+  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe number <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)}</span><span class="Special"> &lt;- </span>copy f  <span class="Comment"># mismatch with a recipe literal</span>
+]
+def f x:boolean <span class="Delimiter">-&gt;</span> y:boolean [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+<span class="traceContains">+error: main: can't copy 'f' to '{1: (recipe number -&gt; number)}'; types don't match</span>
+
+<span class="Delimiter">:(before &quot;End Matching Types For Literal(to)&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_recipe<span class="Delimiter">(</span>to<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> from<span class="Delimiter">.</span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+    raise &lt;&lt; <span class="Constant">&quot;trying to store recipe &quot;</span> &lt;&lt; from<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; into &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>to<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; but there's no such recipe</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="Constant">false</span><span class="Delimiter">;</span>
+  <span class="Delimiter">}</span>
+  <span class="Normal">const</span> recipe&amp; rrhs = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> from<span class="Delimiter">.</span>value<span class="Delimiter">);</span>
+  <span class="Normal">const</span> recipe&amp; rlhs = from_reagent<span class="Delimiter">(</span>to<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>rlhs<span class="Delimiter">.</span>ingredients<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>rrhs<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>!types_match<span class="Delimiter">(</span>rlhs<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> rrhs<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<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">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>rlhs<span class="Delimiter">.</span>products<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>rrhs<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>rlhs<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> rrhs<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span>
+      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
+  <span class="Delimiter">}</span>
+  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(scenario call_variable_compound_ingredient)</span>
+def main [
+  <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe <span class="Delimiter">(</span>address number<span class="Delimiter">)</span> <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)}</span><span class="Special"> &lt;- </span>copy f
+  <span class="Constant">2</span>:address:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
+  <span class="Constant">3</span>:number<span class="Special"> &lt;- </span>call <span class="Delimiter">{</span><span class="Constant">1</span>: <span class="Delimiter">(</span>recipe <span class="Delimiter">(</span>address number<span class="Delimiter">)</span> <span class="Delimiter">-&gt;</span> number<span class="Delimiter">)},</span> <span class="Constant">2</span>:address:number
+]
+def f x:address:number <span class="Delimiter">-&gt;</span> y:number [
+  local-scope
+  load-ingredients
+  y<span class="Special"> &lt;- </span>copy x
+]
+$error: <span class="Constant">0</span>
+
+<span class="Comment">//: make sure we don't accidentally break on a function literal</span>
+<span class="Delimiter">:(scenario jump_forbidden_on_recipe_literals)</span>
+<span class="Special">% Hide_errors = true;</span>
+def foo [
+  local-scope
+]
+def main [
+  local-scope
+  <span class="Delimiter">{</span>
+    <span class="Identifier">break</span>-<span class="Normal">if</span> foo
+  <span class="Delimiter">}</span>
+]
+<span class="Comment"># error should be as if foo is not a recipe</span>
+<span class="traceContains">+error: main: missing type for foo in 'break-if {foo: ()}'</span>
+
+<span class="Delimiter">:(before &quot;End JUMP_IF Checks&quot;)</span>
+check_for_recipe_literals<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">));</span>
+<span class="Delimiter">:(before &quot;End JUMP_UNLESS Checks&quot;)</span>
+check_for_recipe_literals<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">));</span>
+<span class="Delimiter">:(code)</span>
+<span class="Normal">void</span> check_for_recipe_literals<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; caller<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>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_recipe<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;missing type for &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>original_string &lt;&lt; <span class="Constant">&quot; 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="Delimiter">}</span>
+<span class="Delimiter">}</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->
author	Kartik K. Agaram <vc@akkartik.com>	2016-07-05 01:08:00 -0700
committer	Kartik K. Agaram <vc@akkartik.com>	2016-07-05 01:08:00 -0700
commit	298f8065857630e414d84e4ee785a6d17e5f99bb (patch)
tree	8880a092ab59850a6f821ba892f3904ab464431c /html/070recipe.cc.html
parent	f28f2636c6707e1a33bebacafd0486f4965978ea (diff)
download	mu-298f8065857630e414d84e4ee785a6d17e5f99bb.tar.gz