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Copyright (c) 2021, Andinus <andinus@nand.sh>

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<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: Calls can take ingredients just like primitives. To access a recipe's</span>
<span id="L2" class="LineNr">  2 </span><span class="Comment">//: ingredients, use 'next-ingredient'.</span>
<span id="L3" class="LineNr">  3 </span>
<span id="L4" class="LineNr">  4 </span><span class="Delimiter">:(scenario next_ingredient)</span>
<span id="L5" class="LineNr">  5 </span><span class="muRecipe">def</span> main [
<span id="L6" class="LineNr">  6 </span>  f <span class="Constant">2</span>
<span id="L7" class="LineNr">  7 </span>]
<span id="L8" class="LineNr">  8 </span><span class="muRecipe">def</span> f [
<span id="L9" class="LineNr">  9 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>next-ingredient
<span id="L10" class="LineNr"> 10 </span>  <span class="Constant">13</span>:num<span class="Special"> &lt;- </span>add <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">12</span>:num
<span id="L11" class="LineNr"> 11 </span>]
<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+mem: storing 3 in location 13</span>
<span id="L13" class="LineNr"> 13 </span>
<span id="L14" class="LineNr"> 14 </span><span class="Delimiter">:(scenario next_ingredient_missing)</span>
<span id="L15" class="LineNr"> 15 </span><span class="muRecipe">def</span> main [
<span id="L16" class="LineNr"> 16 </span>  f
<span id="L17" class="LineNr"> 17 </span>]
<span id="L18" class="LineNr"> 18 </span><span class="muRecipe">def</span> f [
<span id="L19" class="LineNr"> 19 </span>  _<span class="Delimiter">,</span> <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>next-ingredient
<span id="L20" class="LineNr"> 20 </span>]
<span id="L21" class="LineNr"> 21 </span><span class="traceContains">+mem: storing 0 in location 12</span>
<span id="L22" class="LineNr"> 22 </span>
<span id="L23" class="LineNr"> 23 </span><span class="Delimiter">:(before &quot;End call Fields&quot;)</span>
<span id="L24" class="LineNr"> 24 </span>vector&lt;vector&lt;<span class="Normal">double</span>&gt; &gt; ingredient_atoms<span class="Delimiter">;</span>
<span id="L25" class="LineNr"> 25 </span>vector&lt;reagent&gt; ingredients<span class="Delimiter">;</span>
<span id="L26" class="LineNr"> 26 </span><span class="Normal">int</span> next_ingredient_to_process<span class="Delimiter">;</span>
<span id="L27" class="LineNr"> 27 </span><span class="Delimiter">:(before &quot;End call Constructor&quot;)</span>
<span id="L28" class="LineNr"> 28 </span>next_ingredient_to_process = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L29" class="LineNr"> 29 </span>
<span id="L30" class="LineNr"> 30 </span><span class="Delimiter">:(before &quot;End Call Housekeeping&quot;)</span>
<span id="L31" class="LineNr"> 31 </span><span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span>  i &lt; SIZE<span class="Delimiter">(</span>ingredients<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L32" class="LineNr"> 32 </span>  current_call<span class="Delimiter">().</span>ingredient_atoms<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
<span id="L33" class="LineNr"> 33 </span>  reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> ingredient = call_instruction<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L34" class="LineNr"> 34 </span>  <span class="Comment">// End Compute Call Ingredient</span>
<span id="L35" class="LineNr"> 35 </span>  current_call<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>ingredient<span class="Delimiter">);</span>
<span id="L36" class="LineNr"> 36 </span>  <span class="Comment">// End Populate Call Ingredient</span>
<span id="L37" class="LineNr"> 37 </span><span class="Delimiter">}</span>
<span id="L38" class="LineNr"> 38 </span>
<span id="L39" class="LineNr"> 39 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L40" class="LineNr"> 40 </span>NEXT_INGREDIENT<span class="Delimiter">,</span>
<span id="L41" class="LineNr"> 41 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L42" class="LineNr"> 42 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;next-ingredient&quot;</span><span class="Delimiter">,</span> NEXT_INGREDIENT<span class="Delimiter">);</span>
<span id="L43" class="LineNr"> 43 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L44" class="LineNr"> 44 </span><span class="Normal">case</span> NEXT_INGREDIENT: <span class="Delimiter">{</span>
<span id="L45" class="LineNr"> 45 </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>
<span id="L46" class="LineNr"> 46 </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;'next-ingredient' didn't expect any ingredients in '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L47" class="LineNr"> 47 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L48" class="LineNr"> 48 </span>  <span class="Delimiter">}</span>
<span id="L49" class="LineNr"> 49 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L50" class="LineNr"> 50 </span><span class="Delimiter">}</span>
<span id="L51" class="LineNr"> 51 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L52" class="LineNr"> 52 </span><span class="Normal">case</span> NEXT_INGREDIENT: <span class="Delimiter">{</span>
<span id="L53" class="LineNr"> 53 </span>  assert<span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-&gt;</span>calls<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
<span id="L54" class="LineNr"> 54 </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>
<span id="L55" class="LineNr"> 55 </span>    reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> product = 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 id="L56" class="LineNr"> 56 </span>    <span class="Comment">// End Preprocess NEXT_INGREDIENT product</span>
<span id="L57" class="LineNr"> 57 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">()</span> == <span class="Constant">&quot;main&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L58" class="LineNr"> 58 </span>      <span class="Comment">// no ingredient types since the call might be implicit; assume ingredients are always strings</span>
<span id="L59" class="LineNr"> 59 </span>      <span class="Comment">// todo: how to test this?</span>
<span id="L60" class="LineNr"> 60 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_text<span class="Delimiter">(</span>product<span class="Delimiter">))</span>
<span id="L61" class="LineNr"> 61 </span>        raise &lt;&lt; <span class="Constant">&quot;main: wrong type for ingredient '&quot;</span> &lt;&lt; product<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 id="L62" class="LineNr"> 62 </span>    <span class="Delimiter">}</span>
<span id="L63" class="LineNr"> 63 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>product<span class="Delimiter">,</span>
<span id="L64" class="LineNr"> 64 </span>                              current_call<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>next_ingredient_to_process<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L65" class="LineNr"> 65 </span>      raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;wrong type for ingredient '&quot;</span> &lt;&lt; product<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 id="L66" class="LineNr"> 66 </span>      <span class="Comment">// End next-ingredient Type Mismatch Error</span>
<span id="L67" class="LineNr"> 67 </span>    <span class="Delimiter">}</span>
<span id="L68" class="LineNr"> 68 </span>    products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>
<span id="L69" class="LineNr"> 69 </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>
<span id="L70" class="LineNr"> 70 </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>
<span id="L71" class="LineNr"> 71 </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>
<span id="L72" class="LineNr"> 72 </span>    ++current_call<span class="Delimiter">().</span>next_ingredient_to_process<span class="Delimiter">;</span>
<span id="L73" class="LineNr"> 73 </span>  <span class="Delimiter">}</span>
<span id="L74" class="LineNr"> 74 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L75" class="LineNr"> 75 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">)</span> &lt; <span class="Constant">2</span><span class="Delimiter">)</span>
<span id="L76" class="LineNr"> 76 </span>      raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;no ingredient to save in '&quot;</span> &lt;&lt; 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>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 id="L77" class="LineNr"> 77 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L78" class="LineNr"> 78 </span>    products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
<span id="L79" class="LineNr"> 79 </span>    <span class="Comment">// pad the first product with sufficient zeros to match its type</span>
<span id="L80" class="LineNr"> 80 </span>    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>resize<span class="Delimiter">(</span>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 id="L81" class="LineNr"> 81 </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 id="L82" class="LineNr"> 82 </span>  <span class="Delimiter">}</span>
<span id="L83" class="LineNr"> 83 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L84" class="LineNr"> 84 </span><span class="Delimiter">}</span>
<span id="L85" class="LineNr"> 85 </span>
<span id="L86" class="LineNr"> 86 </span><span class="Delimiter">:(scenario next_ingredient_fail_on_missing)</span>
<span id="L87" class="LineNr"> 87 </span><span class="Special">% Hide_errors = true;</span>
<span id="L88" class="LineNr"> 88 </span><span class="muRecipe">def</span> main [
<span id="L89" class="LineNr"> 89 </span>  f
<span id="L90" class="LineNr"> 90 </span>]
<span id="L91" class="LineNr"> 91 </span><span class="muRecipe">def</span> f [
<span id="L92" class="LineNr"> 92 </span>  <span class="Constant">11</span>:num<span class="Special"> &lt;- </span>next-ingredient
<span id="L93" class="LineNr"> 93 </span>]
<span id="L94" class="LineNr"> 94 </span><span class="traceContains">+error: f: no ingredient to save in '11:num'</span>
<span id="L95" class="LineNr"> 95 </span>
<span id="L96" class="LineNr"> 96 </span><span class="Delimiter">:(scenario rewind_ingredients)</span>
<span id="L97" class="LineNr"> 97 </span><span class="muRecipe">def</span> main [
<span id="L98" class="LineNr"> 98 </span>  f <span class="Constant">2</span>
<span id="L99" class="LineNr"> 99 </span>]
<span id="L100" class="LineNr">100 </span><span class="muRecipe">def</span> f [
<span id="L101" class="LineNr">101 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>next-ingredient  <span class="Comment"># consume ingredient</span>
<span id="L102" class="LineNr">102 </span>  _<span class="Delimiter">,</span> <span class="Constant">1</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>next-ingredient  <span class="Comment"># will not find any ingredients</span>
<span id="L103" class="LineNr">103 </span>  rewind-ingredients
<span id="L104" class="LineNr">104 </span>  <span class="Constant">13</span>:num<span class="Delimiter">,</span> <span class="Constant">2</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>next-ingredient  <span class="Comment"># will find ingredient again</span>
<span id="L105" class="LineNr">105 </span>]
<span id="L106" class="LineNr">106 </span><span class="traceContains">+mem: storing 2 in location 12</span>
<span id="L107" class="LineNr">107 </span><span class="traceContains">+mem: storing 0 in location 1</span>
<span id="L108" class="LineNr">108 </span><span class="traceContains">+mem: storing 2 in location 13</span>
<span id="L109" class="LineNr">109 </span><span class="traceContains">+mem: storing 1 in location 2</span>
<span id="L110" class="LineNr">110 </span>
<span id="L111" class="LineNr">111 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L112" class="LineNr">112 </span>REWIND_INGREDIENTS<span class="Delimiter">,</span>
<span id="L113" class="LineNr">113 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L114" class="LineNr">114 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;rewind-ingredients&quot;</span><span class="Delimiter">,</span> REWIND_INGREDIENTS<span class="Delimiter">);</span>
<span id="L115" class="LineNr">115 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L116" class="LineNr">116 </span><span class="Normal">case</span> REWIND_INGREDIENTS: <span class="Delimiter">{</span>
<span id="L117" class="LineNr">117 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L118" class="LineNr">118 </span><span class="Delimiter">}</span>
<span id="L119" class="LineNr">119 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L120" class="LineNr">120 </span><span class="Normal">case</span> REWIND_INGREDIENTS: <span class="Delimiter">{</span>
<span id="L121" class="LineNr">121 </span>  current_call<span class="Delimiter">().</span>next_ingredient_to_process = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L122" class="LineNr">122 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L123" class="LineNr">123 </span><span class="Delimiter">}</span>
<span id="L124" class="LineNr">124 </span>
<span id="L125" class="LineNr">125 </span><span class="Delimiter">:(scenario ingredient)</span>
<span id="L126" class="LineNr">126 </span><span class="muRecipe">def</span> main [
<span id="L127" class="LineNr">127 </span>  f <span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">2</span>
<span id="L128" class="LineNr">128 </span>]
<span id="L129" class="LineNr">129 </span><span class="muRecipe">def</span> f [
<span id="L130" class="LineNr">130 </span>  <span class="Constant">12</span>:num<span class="Special"> &lt;- </span>ingredient <span class="Constant">1</span>  <span class="Comment"># consume second ingredient first</span>
<span id="L131" class="LineNr">131 </span>  <span class="Constant">13</span>:num<span class="Delimiter">,</span> <span class="Constant">1</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>next-ingredient  <span class="Comment"># next-ingredient tries to scan past that</span>
<span id="L132" class="LineNr">132 </span>]
<span id="L133" class="LineNr">133 </span><span class="traceContains">+mem: storing 2 in location 12</span>
<span id="L134" class="LineNr">134 </span><span class="traceContains">+mem: storing 0 in location 1</span>
<span id="L135" class="LineNr">135 </span>
<span id="L136" class="LineNr">136 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L137" class="LineNr">137 </span>INGREDIENT<span class="Delimiter">,</span>
<span id="L138" class="LineNr">138 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L139" class="LineNr">139 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;ingredient&quot;</span><span class="Delimiter">,</span> INGREDIENT<span class="Delimiter">);</span>
<span id="L140" class="LineNr">140 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L141" class="LineNr">141 </span><span class="Normal">case</span> INGREDIENT: <span class="Delimiter">{</span>
<span id="L142" class="LineNr">142 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L143" class="LineNr">143 </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;'ingredient' expects exactly one ingredient, but got '&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 id="L144" class="LineNr">144 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L145" class="LineNr">145 </span>  <span class="Delimiter">}</span>
<span id="L146" class="LineNr">146 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_literal<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> &amp;&amp; !is_mu_number<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>
<span id="L147" class="LineNr">147 </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;'ingredient' expects a literal ingredient, 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 id="L148" class="LineNr">148 </span>    <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L149" class="LineNr">149 </span>  <span class="Delimiter">}</span>
<span id="L150" class="LineNr">150 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L151" class="LineNr">151 </span><span class="Delimiter">}</span>
<span id="L152" class="LineNr">152 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L153" class="LineNr">153 </span><span class="Normal">case</span> INGREDIENT: <span class="Delimiter">{</span>
<span id="L154" class="LineNr">154 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><span class="Normal">static_cast</span>&lt;<span class="Normal">int</span>&gt;<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> &lt; SIZE<span class="Delimiter">(</span>current_call<span class="Delimiter">().</span>ingredient_atoms<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L155" class="LineNr">155 </span>    current_call<span class="Delimiter">().</span>next_ingredient_to_process = 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 id="L156" class="LineNr">156 </span>    products<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>
<span id="L157" class="LineNr">157 </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>
<span id="L158" class="LineNr">158 </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>
<span id="L159" class="LineNr">159 </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>
<span id="L160" class="LineNr">160 </span>    ++current_call<span class="Delimiter">().</span>next_ingredient_to_process<span class="Delimiter">;</span>
<span id="L161" class="LineNr">161 </span>  <span class="Delimiter">}</span>
<span id="L162" class="LineNr">162 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L163" class="LineNr">163 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">)</span> &gt; <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L164" class="LineNr">164 </span>      products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
<span id="L165" class="LineNr">165 </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>  <span class="Comment">// todo: will fail noisily if we try to read a compound value</span>
<span id="L166" class="LineNr">166 </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 id="L167" class="LineNr">167 </span>    <span class="Delimiter">}</span>
<span id="L168" class="LineNr">168 </span>  <span class="Delimiter">}</span>
<span id="L169" class="LineNr">169 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L170" class="LineNr">170 </span><span class="Delimiter">}</span>
<span id="L171" class="LineNr">171 </span>
<span id="L172" class="LineNr">172 </span><span class="Comment">//: a particularly common array type is the text, or address:array:character</span>
<span id="L173" class="LineNr">173 </span><span class="Delimiter">:(code)</span>
<span id="L174" class="LineNr">174 </span><span class="Normal">bool</span> is_mu_text<span class="Delimiter">(</span>reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L175" class="LineNr">175 </span>  <span class="Comment">// End Preprocess is_mu_text(reagent x)</span>
<span id="L176" class="LineNr">176 </span>  <span class="Identifier">return</span> x<span class="Delimiter">.</span>type
<span id="L177" class="LineNr">177 </span>      &amp;&amp; !x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>atom
<span id="L178" class="LineNr">178 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>atom
<span id="L179" class="LineNr">179 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;address&quot;</span><span class="Delimiter">)</span>
<span id="L180" class="LineNr">180 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right
<span id="L181" class="LineNr">181 </span>      &amp;&amp; !x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>atom
<span id="L182" class="LineNr">182 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>atom
<span id="L183" class="LineNr">183 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;array&quot;</span><span class="Delimiter">)</span>
<span id="L184" class="LineNr">184 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>right
<span id="L185" class="LineNr">185 </span>      &amp;&amp; !x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>atom
<span id="L186" class="LineNr">186 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>left<span class="Delimiter">-&gt;</span>value == get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;character&quot;</span><span class="Delimiter">)</span>
<span id="L187" class="LineNr">187 </span>      &amp;&amp; x<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>right<span class="Delimiter">-&gt;</span>right == <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L188" class="LineNr">188 </span><span class="Delimiter">}</span>
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