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<pre id='vimCodeElement'>
<span class="Comment">//: push a variable recipe on the call stack</span>
<span class="Delimiter">:(scenario call_literal_recipe)</span>
recipe main [
<span class="Constant">1</span>:number<span class="Special"> <- </span>call f:recipe<span class="Delimiter">,</span> <span class="Constant">34</span>:literal
]
recipe f [
<span class="Constant">2</span>:number<span class="Special"> <- </span>next-ingredient
reply <span class="Constant">2</span>:number
]
<span class="traceContains">+mem: storing 34 in location 1</span>
<span class="Delimiter">:(scenario call_variable)</span>
recipe main [
<span class="Constant">1</span>:number/recipe<span class="Special"> <- </span>copy <span class="Constant">1001</span>:literal/f <span class="Comment"># hack: assumes tests start recipes at 1000</span>
<span class="Constant">2</span>:number<span class="Special"> <- </span>call <span class="Constant">1</span>:number/recipe<span class="Delimiter">,</span> <span class="Constant">34</span>:literal
]
recipe f [ <span class="Comment"># recipe 1001</span>
<span class="Constant">3</span>:number<span class="Special"> <- </span>next-ingredient
reply <span class="Constant">3</span>:number
]
<span class="traceContains">+mem: storing 34 in location 2</span>
<span class="CommentedCode">#? ?</span>
<span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
CALL<span class="Delimiter">,</span>
<span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
Recipe_number[<span class="Constant">"call"</span>] = CALL<span class="Delimiter">;</span>
<span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
case CALL: <span class="Delimiter">{</span>
recipe_number r = <span class="Constant">0</span><span class="Delimiter">;</span>
if <span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>initialized<span class="Delimiter">)</span> <span class="Delimiter">{</span>
assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
<span class="Comment">// 'call' received an integer recipe_number</span>
r = 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>
else <span class="Delimiter">{</span>
<span class="Comment">// 'call' received a literal recipe name</span>
r = Recipe_number[current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name]<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
Current_routine<span class="Delimiter">-></span>calls<span class="Delimiter">.</span>push_front<span class="Delimiter">(</span>call<span class="Delimiter">(</span>r<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>
<span class="Identifier">goto</span> complete_call<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
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