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<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment">//: Construct types out of their constituent fields.</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="Delimiter">:(scenario merge)</span>
<span id="L4" class="LineNr"> 4 </span><span class="muData">container</span> foo [
<span id="L5" class="LineNr"> 5 </span> <span class="Normal">x</span>:num
<span id="L6" class="LineNr"> 6 </span> <span class="Normal">y</span>:num
<span id="L7" class="LineNr"> 7 </span>]
<span id="L8" class="LineNr"> 8 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L9" class="LineNr"> 9 </span> <span class="Constant">1</span>:foo<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L10" class="LineNr"> 10 </span>]
<span id="L11" class="LineNr"> 11 </span><span class="traceContains">+mem: storing 3 in location 1</span>
<span id="L12" class="LineNr"> 12 </span><span class="traceContains">+mem: storing 4 in location 2</span>
<span id="L13" class="LineNr"> 13 </span>
<span id="L14" class="LineNr"> 14 </span><span class="Delimiter">:(before "End Primitive Recipe Declarations")</span>
<span id="L15" class="LineNr"> 15 </span>MERGE<span class="Delimiter">,</span>
<span id="L16" class="LineNr"> 16 </span><span class="Delimiter">:(before "End Primitive Recipe Numbers")</span>
<span id="L17" class="LineNr"> 17 </span><a href='001help.cc.html#L218'>put</a><span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">"merge"</span><span class="Delimiter">,</span> MERGE<span class="Delimiter">);</span>
<span id="L18" class="LineNr"> 18 </span><span class="Delimiter">:(before "End Primitive Recipe Checks")</span>
<span id="L19" class="LineNr"> 19 </span><span class="Normal">case</span> MERGE: <span class="Delimiter">{</span>
<span id="L20" class="LineNr"> 20 </span> <span class="Comment">// type-checking in a separate transform below</span>
<span id="L21" class="LineNr"> 21 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L22" class="LineNr"> 22 </span><span class="Delimiter">}</span>
<span id="L23" class="LineNr"> 23 </span><span class="Delimiter">:(before "End Primitive Recipe Implementations")</span>
<span id="L24" class="LineNr"> 24 </span><span class="Normal">case</span> MERGE: <span class="Delimiter">{</span>
<span id="L25" class="LineNr"> 25 </span> products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L26" class="LineNr"> 26 </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 < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
<span id="L27" class="LineNr"> 27 </span> <span class="Conceal">¦</span> <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span> ++j<span class="Delimiter">)</span>
<span id="L28" class="LineNr"> 28 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</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>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>at<span class="Delimiter">(</span>j<span class="Delimiter">));</span>
<span id="L29" class="LineNr"> 29 </span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L30" class="LineNr"> 30 </span><span class="Delimiter">}</span>
<span id="L31" class="LineNr"> 31 </span>
<span id="L32" class="LineNr"> 32 </span><span class="Comment">//: type-check 'merge' to avoid interpreting numbers as addresses</span>
<span id="L33" class="LineNr"> 33 </span>
<span id="L34" class="LineNr"> 34 </span><span class="Delimiter">:(scenario merge_check)</span>
<span id="L35" class="LineNr"> 35 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L36" class="LineNr"> 36 </span> <span class="Constant">1</span>:point<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L37" class="LineNr"> 37 </span>]
<span id="L38" class="LineNr"> 38 </span>$error: <span class="Constant">0</span>
<span id="L39" class="LineNr"> 39 </span>
<span id="L40" class="LineNr"> 40 </span><span class="Delimiter">:(scenario merge_check_missing_element)</span>
<span id="L41" class="LineNr"> 41 </span><span class="Special">% Hide_errors = true;</span>
<span id="L42" class="LineNr"> 42 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L43" class="LineNr"> 43 </span> <span class="Constant">1</span>:point<span class="Special"> <- </span>merge <span class="Constant">3</span>
<span id="L44" class="LineNr"> 44 </span>]
<span id="L45" class="LineNr"> 45 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too few ingredients in '1:point <- merge 3'</span>
<span id="L46" class="LineNr"> 46 </span>
<span id="L47" class="LineNr"> 47 </span><span class="Delimiter">:(scenario merge_check_extra_element)</span>
<span id="L48" class="LineNr"> 48 </span><span class="Special">% Hide_errors = true;</span>
<span id="L49" class="LineNr"> 49 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L50" class="LineNr"> 50 </span> <span class="Constant">1</span>:point<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L51" class="LineNr"> 51 </span>]
<span id="L52" class="LineNr"> 52 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too many ingredients in '1:point <- merge 3, 4, 5'</span>
<span id="L53" class="LineNr"> 53 </span>
<span id="L54" class="LineNr"> 54 </span><span class="Comment">//: We want to avoid causing memory corruption, but other than that we want to</span>
<span id="L55" class="LineNr"> 55 </span><span class="Comment">//: be flexible in how we construct containers of containers. It should be</span>
<span id="L56" class="LineNr"> 56 </span><span class="Comment">//: equally easy to define a container out of primitives or intermediate</span>
<span id="L57" class="LineNr"> 57 </span><span class="Comment">//: container fields.</span>
<span id="L58" class="LineNr"> 58 </span>
<span id="L59" class="LineNr"> 59 </span><span class="Delimiter">:(scenario merge_check_recursive_containers)</span>
<span id="L60" class="LineNr"> 60 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L61" class="LineNr"> 61 </span> <span class="Constant">1</span>:point<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L62" class="LineNr"> 62 </span> <span class="Constant">1</span>:point-number<span class="Special"> <- </span>merge <span class="Constant">1</span>:point<span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L63" class="LineNr"> 63 </span>]
<span id="L64" class="LineNr"> 64 </span>$error: <span class="Constant">0</span>
<span id="L65" class="LineNr"> 65 </span>
<span id="L66" class="LineNr"> 66 </span><span class="Delimiter">:(scenario merge_check_recursive_containers_2)</span>
<span id="L67" class="LineNr"> 67 </span><span class="Special">% Hide_errors = true;</span>
<span id="L68" class="LineNr"> 68 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L69" class="LineNr"> 69 </span> <span class="Constant">1</span>:point<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L70" class="LineNr"> 70 </span> <span class="Constant">2</span>:point-number<span class="Special"> <- </span>merge <span class="Constant">1</span>:point
<span id="L71" class="LineNr"> 71 </span>]
<span id="L72" class="LineNr"> 72 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too few ingredients in '2:point-number <- merge 1:point'</span>
<span id="L73" class="LineNr"> 73 </span>
<span id="L74" class="LineNr"> 74 </span><span class="Delimiter">:(scenario merge_check_recursive_containers_3)</span>
<span id="L75" class="LineNr"> 75 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L76" class="LineNr"> 76 </span> <span class="Constant">1</span>:point-number<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">,</span> <span class="Constant">5</span>
<span id="L77" class="LineNr"> 77 </span>]
<span id="L78" class="LineNr"> 78 </span>$error: <span class="Constant">0</span>
<span id="L79" class="LineNr"> 79 </span>
<span id="L80" class="LineNr"> 80 </span><span class="Delimiter">:(scenario merge_check_recursive_containers_4)</span>
<span id="L81" class="LineNr"> 81 </span><span class="Special">% Hide_errors = true;</span>
<span id="L82" class="LineNr"> 82 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L83" class="LineNr"> 83 </span> <span class="Constant">1</span>:point-number<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L84" class="LineNr"> 84 </span>]
<span id="L85" class="LineNr"> 85 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: too few ingredients in '1:point-number <- merge 3, 4'</span>
<span id="L86" class="LineNr"> 86 </span>
<span id="L87" class="LineNr"> 87 </span><span class="Delimiter">:(scenario merge_check_reflexive)</span>
<span id="L88" class="LineNr"> 88 </span><span class="Special">% Hide_errors = true;</span>
<span id="L89" class="LineNr"> 89 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L90" class="LineNr"> 90 </span> <span class="Constant">1</span>:point<span class="Special"> <- </span>merge <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
<span id="L91" class="LineNr"> 91 </span> <span class="Constant">2</span>:point<span class="Special"> <- </span>merge <span class="Constant">1</span>:point
<span id="L92" class="LineNr"> 92 </span>]
<span id="L93" class="LineNr"> 93 </span>$error: <span class="Constant">0</span>
<span id="L94" class="LineNr"> 94 </span>
<span id="L95" class="LineNr"> 95 </span><span class="Comment">//: Since a container can be merged in several ways, we need to be able to</span>
<span id="L96" class="LineNr"> 96 </span><span class="Comment">//: backtrack through different possibilities. Later we'll allow creating</span>
<span id="L97" class="LineNr"> 97 </span><span class="Comment">//: exclusive containers which contain just one of rather than all of their</span>
<span id="L98" class="LineNr"> 98 </span><span class="Comment">//: elements. That will also require backtracking capabilities. Here's the</span>
<span id="L99" class="LineNr"> 99 </span><span class="Comment">//: state we need to maintain for backtracking:</span>
<span id="L100" class="LineNr">100 </span>
<span id="L101" class="LineNr">101 </span><span class="Delimiter">:(before "End Types")</span>
<span id="L102" class="LineNr">102 </span><span class="Normal">struct</span> merge_check_point <span class="Delimiter">{</span>
<span id="L103" class="LineNr">103 </span> reagent container<span class="Delimiter">;</span>
<span id="L104" class="LineNr">104 </span> <span class="Normal">int</span> container_element_index<span class="Delimiter">;</span>
<span id="L105" class="LineNr">105 </span> merge_check_point<span class="Delimiter">(</span><span class="Normal">const</span> reagent& c<span class="Delimiter">,</span> <span class="Normal">int</span> i<span class="Delimiter">)</span> :container<span class="Delimiter">(</span>c<span class="Delimiter">),</span> container_element_index<span class="Delimiter">(</span>i<span class="Delimiter">)</span> <span class="Delimiter">{}</span>
<span id="L106" class="LineNr">106 </span><span class="Delimiter">};</span>
<span id="L107" class="LineNr">107 </span>
<span id="L108" class="LineNr">108 </span><span class="Normal">struct</span> <a href='031merge.cc.html#L108'>merge_check_state</a> <span class="Delimiter">{</span>
<span id="L109" class="LineNr">109 </span> stack<merge_check_point> data<span class="Delimiter">;</span>
<span id="L110" class="LineNr">110 </span><span class="Delimiter">};</span>
<span id="L111" class="LineNr">111 </span>
<span id="L112" class="LineNr">112 </span><span class="Delimiter">:(before "End Checks")</span>
<span id="L113" class="LineNr">113 </span>Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><a href='031merge.cc.html#L115'>check_merge_calls</a><span class="Delimiter">);</span> <span class="Comment">// idempotent</span>
<span id="L114" class="LineNr">114 </span><span class="Delimiter">:(code)</span>
<span id="L115" class="LineNr">115 </span><span class="Normal">void</span> <a href='031merge.cc.html#L115'>check_merge_calls</a><span class="Delimiter">(</span><span class="Normal">const</span> <a href='010vm.cc.html#L14'>recipe_ordinal</a> r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L116" class="LineNr">116 </span> <span class="Normal">const</span> recipe& caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
<span id="L117" class="LineNr">117 </span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"--- type-check merge instructions in <a href='010vm.cc.html#L19'>recipe</a> "</span> << caller<span class="Delimiter">.</span>name << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L118" class="LineNr">118 </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 < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L119" class="LineNr">119 </span> <span class="Conceal">¦</span> <span class="Normal">const</span> instruction& inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L120" class="LineNr">120 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name != <span class="Constant">"merge"</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L121" class="LineNr">121 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">)</span> != <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L122" class="LineNr">122 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'merge' should yield a single product in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L123" class="LineNr">123 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L124" class="LineNr">124 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L125" class="LineNr">125 </span> <span class="Conceal">¦</span> reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> product = inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L126" class="LineNr">126 </span> <span class="Conceal">¦</span> <span class="Comment">// Update product While Type-checking Merge</span>
<span id="L127" class="LineNr">127 </span> <span class="Conceal">¦</span> <span class="Normal">const</span> type_tree* product_base_type = product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>atom ? product<span class="Delimiter">.</span>type : product<span class="Delimiter">.</span>type<span class="Delimiter">-></span>left<span class="Delimiter">;</span>
<span id="L128" class="LineNr">128 </span> <span class="Conceal">¦</span> assert<span class="Delimiter">(</span>product_base_type<span class="Delimiter">-></span>atom<span class="Delimiter">);</span>
<span id="L129" class="LineNr">129 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>product_base_type<span class="Delimiter">-></span>value == <span class="Constant">0</span> || !contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> product_base_type<span class="Delimiter">-></span>value<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L130" class="LineNr">130 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'merge' should yield a container in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L131" class="LineNr">131 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L132" class="LineNr">132 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L133" class="LineNr">133 </span> <span class="Conceal">¦</span> <span class="Normal">const</span> type_info& info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> product_base_type<span class="Delimiter">-></span>value<span class="Delimiter">);</span>
<span id="L134" class="LineNr">134 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>info<span class="Delimiter">.</span>kind != <a href='010vm.cc.html#L173'>CONTAINER</a> && info<span class="Delimiter">.</span>kind != <a href='010vm.cc.html#L174'>EXCLUSIVE_CONTAINER</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"'merge' should yield a container in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L136" class="LineNr">136 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L137" class="LineNr">137 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L138" class="LineNr">138 </span> <span class="Conceal">¦</span> <a href='031merge.cc.html#L142'>check_merge_call</a><span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">,</span> product<span class="Delimiter">,</span> caller<span class="Delimiter">,</span> inst<span class="Delimiter">);</span>
<span id="L139" class="LineNr">139 </span> <span class="Delimiter">}</span>
<span id="L140" class="LineNr">140 </span><span class="Delimiter">}</span>
<span id="L141" class="LineNr">141 </span>
<span id="L142" class="LineNr">142 </span><span class="Normal">void</span> <a href='031merge.cc.html#L142'>check_merge_call</a><span class="Delimiter">(</span><span class="Normal">const</span> vector<reagent>& ingredients<span class="Delimiter">,</span> <span class="Normal">const</span> reagent& product<span class="Delimiter">,</span> <span class="Normal">const</span> recipe& caller<span class="Delimiter">,</span> <span class="Normal">const</span> instruction& inst<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L143" class="LineNr">143 </span> <span class="Normal">int</span> ingredient_index = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L144" class="LineNr">144 </span> <a href='031merge.cc.html#L108'>merge_check_state</a> state<span class="Delimiter">;</span>
<span id="L145" class="LineNr">145 </span> state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>push<span class="Delimiter">(</span>merge_check_point<span class="Delimiter">(</span>product<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L146" class="LineNr">146 </span> <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L147" class="LineNr">147 </span> <span class="Conceal">¦</span> assert<span class="Delimiter">(</span>!state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
<span id="L148" class="LineNr">148 </span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << ingredient_index << <span class="Constant">" vs "</span> << <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">)</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L149" class="LineNr">149 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index >= <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L150" class="LineNr">150 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too few ingredients in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L151" class="LineNr">151 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L152" class="LineNr">152 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L153" class="LineNr">153 </span> <span class="Conceal">¦</span> reagent& container = state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container<span class="Delimiter">;</span>
<span id="L154" class="LineNr">154 </span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!container<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span> <span class="Comment">// error handled elsewhere</span>
<span id="L155" class="LineNr">155 </span> <span class="Conceal">¦</span> <span class="Normal">const</span> type_tree* top_root_type = container<span class="Delimiter">.</span>type<span class="Delimiter">-></span>atom ? container<span class="Delimiter">.</span>type : container<span class="Delimiter">.</span>type<span class="Delimiter">-></span>left<span class="Delimiter">;</span>
<span id="L156" class="LineNr">156 </span> <span class="Conceal">¦</span> assert<span class="Delimiter">(</span>top_root_type<span class="Delimiter">-></span>atom<span class="Delimiter">);</span>
<span id="L157" class="LineNr">157 </span> <span class="Conceal">¦</span> type_info& container_info = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> top_root_type<span class="Delimiter">-></span>value<span class="Delimiter">);</span>
<span id="L158" class="LineNr">158 </span> <span class="Conceal">¦</span> <span class="Normal">switch</span> <span class="Delimiter">(</span>container_info<span class="Delimiter">.</span>kind<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L159" class="LineNr">159 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">case</span> <a href='010vm.cc.html#L173'>CONTAINER</a>: <span class="Delimiter">{</span>
<span id="L160" class="LineNr">160 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment">// degenerate case: merge with the same type always succeeds</span>
<span id="L161" class="LineNr">161 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index == <span class="Constant">0</span> && <a href='021check_instruction.cc.html#L100'>types_coercible</a><span class="Delimiter">(</span>container<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span>
<span id="L162" class="LineNr">162 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L163" class="LineNr">163 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">const</span> reagent& expected_ingredient = <a href='030container.cc.html#L430'>element_type</a><span class="Delimiter">(</span>container<span class="Delimiter">.</span>type<span class="Delimiter">,</span> state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">);</span>
<span id="L164" class="LineNr">164 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L161'>trace</a><span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">"transform"</span><span class="Delimiter">)</span> << <span class="Constant">"checking container "</span> << <a href='028call_return.cc.html#L158'>to_string</a><span class="Delimiter">(</span>container<span class="Delimiter">)</span> << <span class="Constant">" || "</span> << <a href='028call_return.cc.html#L158'>to_string</a><span class="Delimiter">(</span>expected_ingredient<span class="Delimiter">)</span> << <span class="Constant">" vs ingredient "</span> << ingredient_index << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L165" class="LineNr">165 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment">// if the current element is the ingredient we expect, move on to the next element/ingredient</span>
<span id="L166" class="LineNr">166 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='021check_instruction.cc.html#L100'>types_coercible</a><span class="Delimiter">(</span>expected_ingredient<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L167" class="LineNr">167 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> ++ingredient_index<span class="Delimiter">;</span>
<span id="L168" class="LineNr">168 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> ++state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">;</span>
<span id="L169" class="LineNr">169 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">while</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index >= <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> get_base_type<span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container<span class="Delimiter">.</span>type<span class="Delimiter">)-></span>value<span class="Delimiter">).</span>elements<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L170" class="LineNr">170 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>pop<span class="Delimiter">();</span>
<span id="L171" class="LineNr">171 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L172" class="LineNr">172 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">))</span>
<span id="L173" class="LineNr">173 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too many ingredients in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L174" class="LineNr">174 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L175" class="LineNr">175 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L176" class="LineNr">176 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> ++state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">;</span>
<span id="L177" class="LineNr">177 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L178" class="LineNr">178 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L179" class="LineNr">179 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment">// if not, maybe it's a field of the current element</span>
<span id="L180" class="LineNr">180 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L181" class="LineNr">181 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment">// no change to ingredient_index</span>
<span id="L182" class="LineNr">182 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>push<span class="Delimiter">(</span>merge_check_point<span class="Delimiter">(</span>expected_ingredient<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">));</span>
<span id="L183" class="LineNr">183 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L184" class="LineNr">184 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L185" class="LineNr">185 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L186" class="LineNr">186 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment">// End check_merge_call Special-cases</span>
<span id="L187" class="LineNr">187 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">default</span>: <span class="Delimiter">{</span>
<span id="L188" class="LineNr">188 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>!types_coercible<span class="Delimiter">(</span>container<span class="Delimiter">,</span> ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
<span id="L189" class="LineNr">189 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"incorrect type of ingredient "</span> << ingredient_index << <span class="Constant">" in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L190" class="LineNr">190 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <span class="Constant">" (expected '"</span> << debug_string<span class="Delimiter">(</span>container<span class="Delimiter">)</span> << <span class="Constant">"')</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L191" class="LineNr">191 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <span class="Constant">" (got '"</span> << debug_string<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>ingredient_index<span class="Delimiter">))</span> << <span class="Constant">"')</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L192" class="LineNr">192 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L193" class="LineNr">193 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L194" class="LineNr">194 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> ++ingredient_index<span class="Delimiter">;</span>
<span id="L195" class="LineNr">195 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Comment">// ++state.data.top().container_element_index; // unnecessary, but wouldn't do any harm</span>
<span id="L196" class="LineNr">196 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">do</span> <span class="Delimiter">{</span>
<span id="L197" class="LineNr">197 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>pop<span class="Delimiter">();</span>
<span id="L198" class="LineNr">198 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L199" class="LineNr">199 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Normal">if</span> <span class="Delimiter">(</span>ingredient_index < <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>ingredients<span class="Delimiter">))</span>
<span id="L200" class="LineNr">200 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <a href='003trace.cc.html#L168'>raise</a> << <a href='013update_operation.cc.html#L25'>maybe</a><span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> << <span class="Constant">"too many ingredients in '"</span> << inst<span class="Delimiter">.</span>original_string << <span class="Constant">"'</span><span class="cSpecial">\n</span><span class="Constant">"</span> << <a href='003trace.cc.html#L185'>end</a><span class="Delimiter">();</span>
<span id="L201" class="LineNr">201 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L202" class="LineNr">202 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L203" class="LineNr">203 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> ++state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index<span class="Delimiter">;</span>
<span id="L204" class="LineNr">204 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span> <span class="Normal">while</span> <span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container_element_index >= <a href='001help.cc.html#L138'>SIZE</a><span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> get_base_type<span class="Delimiter">(</span>state<span class="Delimiter">.</span>data<span class="Delimiter">.</span>top<span class="Delimiter">().</span>container<span class="Delimiter">.</span>type<span class="Delimiter">)-></span>value<span class="Delimiter">).</span>elements<span class="Delimiter">));</span>
<span id="L205" class="LineNr">205 </span> <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L206" class="LineNr">206 </span> <span class="Conceal">¦</span> <span class="Delimiter">}</span>
<span id="L207" class="LineNr">207 </span> <span class="Delimiter">}</span>
<span id="L208" class="LineNr">208 </span> <span class="Comment">// never gets here</span>
<span id="L209" class="LineNr">209 </span> assert<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">);</span>
<span id="L210" class="LineNr">210 </span><span class="Delimiter">}</span>
<span id="L211" class="LineNr">211 </span>
<span id="L212" class="LineNr">212 </span><span class="Comment">//: replaced in a later layer</span>
<span id="L213" class="LineNr">213 </span><span class="Comment">//: todo: find some clean way to take this call completely out of this layer</span>
<span id="L214" class="LineNr">214 </span><span class="Normal">const</span> type_tree* get_base_type<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* t<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L215" class="LineNr">215 </span> <span class="Identifier">return</span> t<span class="Delimiter">;</span>
<span id="L216" class="LineNr">216 </span><span class="Delimiter">}</span>
<span id="L217" class="LineNr">217 </span>
<span id="L218" class="LineNr">218 </span><span class="Delimiter">:(scenario merge_check_product)</span>
<span id="L219" class="LineNr">219 </span><span class="Special">% Hide_errors = true;</span>
<span id="L220" class="LineNr">220 </span><span class="muRecipe">def</span> <a href='000organization.cc.html#L113'>main</a> [
<span id="L221" class="LineNr">221 </span> <span class="Constant">1</span>:num<span class="Special"> <- </span>merge <span class="Constant">3</span>
<span id="L222" class="LineNr">222 </span>]
<span id="L223" class="LineNr">223 </span><span class="traceContains">+error: <a href='000organization.cc.html#L113'>main</a>: 'merge' should yield a container in '1:num <- merge 3'</span>
<span id="L224" class="LineNr">224 </span>
<span id="L225" class="LineNr">225 </span><span class="Delimiter">:(before "End Includes")</span>
<span id="L226" class="LineNr">226 </span><span class="PreProc">#include </span><span class="Constant"><stack></span>
<span id="L227" class="LineNr">227 </span><span class="Normal">using</span> std::stack<span class="Delimiter">;</span>
</pre>
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