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<span class="Comment">//: A big convenience high-level languages provide is the ability to name memory</span>
<span class="Comment">//: locations. In mu, a transform called 'transform_names' provides this</span>
<span class="Comment">//: convenience.</span>

<span class="Delimiter">:(scenario convert_names)</span>
recipe main [
  x:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>:literal
]
<span class="traceContains">+name: assign x 1</span>
<span class="traceContains">+run: instruction main/0</span>
<span class="traceContains">+mem: storing 0 in location 1</span>

<span class="Delimiter">:(scenario convert_names_warns)</span>
<span class="Special">% Hide_warnings = true;</span>
recipe main [
  x:number<span class="Special"> &lt;- </span>copy y:number
]
<span class="traceContains">+warn: use before set: y in main</span>

<span class="Delimiter">:(after &quot;int main&quot;)</span>
  Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>transform_names<span class="Delimiter">);</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;recipe_number<span class="Delimiter">,</span> map&lt;string<span class="Delimiter">,</span> index_t&gt; &gt; Name<span class="Delimiter">;</span>
<span class="Delimiter">:(after &quot;Clear Other State For recently_added_recipes&quot;)</span>
for <span class="Delimiter">(</span>index_t i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; recently_added_recipes<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  Name<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>recently_added_recipes<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
void transform_names<span class="Delimiter">(</span>const recipe_number r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  bool names_used = <span class="Constant">false</span><span class="Delimiter">;</span>
  bool numeric_locations_used = <span class="Constant">false</span><span class="Delimiter">;</span>
  map&lt;string<span class="Delimiter">,</span> index_t&gt;&amp; names = Name[r]<span class="Delimiter">;</span>
  <span class="Comment">// store the indices 'used' so far in the map</span>
  index_t&amp; curr_idx = names[<span class="Constant">&quot;&quot;</span>]<span class="Delimiter">;</span>
  ++curr_idx<span class="Delimiter">;</span>  <span class="Comment">// avoid using index 0, benign skip in some other cases</span>
  for <span class="Delimiter">(</span>index_t i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; Recipe[r]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    instruction&amp; inst = Recipe[r]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    <span class="Comment">// Per-recipe Transforms</span>
    <span class="Comment">// map names to addresses</span>
    for <span class="Delimiter">(</span>index_t in = <span class="Constant">0</span><span class="Delimiter">;</span> in &lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      if <span class="Delimiter">(</span>is_numeric_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">)))</span> numeric_locations_used = <span class="Constant">true</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>is_named_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">)))</span> names_used = <span class="Constant">true</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>disqualified<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>!already_transformed<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">),</span> names<span class="Delimiter">))</span> <span class="Delimiter">{</span>
        raise &lt;&lt; <span class="Constant">&quot;use before set: &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; in &quot;</span> &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
      inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>lookup_name<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">),</span> r<span class="Delimiter">));</span>
    <span class="Delimiter">}</span>
    for <span class="Delimiter">(</span>index_t out = <span class="Constant">0</span><span class="Delimiter">;</span> out &lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      if <span class="Delimiter">(</span>is_numeric_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">)))</span> numeric_locations_used = <span class="Constant">true</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>is_named_location<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">)))</span> names_used = <span class="Constant">true</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>disqualified<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>names<span class="Delimiter">.</span>find<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">).</span>name<span class="Delimiter">)</span> == names<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
        trace<span class="Delimiter">(</span><span class="Constant">&quot;name&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;assign &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; &quot;</span> &lt;&lt; curr_idx<span class="Delimiter">;</span>
        names[inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">).</span>name] = curr_idx<span class="Delimiter">;</span>
        curr_idx += size_of<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">));</span>
      <span class="Delimiter">}</span>
      inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>lookup_name<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>out<span class="Delimiter">),</span> r<span class="Delimiter">));</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  if <span class="Delimiter">(</span>names_used &amp;&amp; numeric_locations_used<span class="Delimiter">)</span>
    raise &lt;&lt; <span class="Constant">&quot;mixing variable names and numeric addresses in &quot;</span> &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

bool disqualified<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">mutable</span><span class="Comment">*/</span> reagent&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>types<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
    raise &lt;&lt; <span class="Constant">&quot;missing type in &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  assert<span class="Delimiter">(</span>!x<span class="Delimiter">.</span>types<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
  if <span class="Delimiter">(</span>is_raw<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>isa_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>is_number<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>
  if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">&quot;default-space&quot;</span><span class="Delimiter">)</span>
    x<span class="Delimiter">.</span>initialized = <span class="Constant">true</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>initialized<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

bool already_transformed<span class="Delimiter">(</span>const reagent&amp; r<span class="Delimiter">,</span> const map&lt;string<span class="Delimiter">,</span> index_t&gt;&amp; names<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> names<span class="Delimiter">.</span>find<span class="Delimiter">(</span>r<span class="Delimiter">.</span>name<span class="Delimiter">)</span> != names<span class="Delimiter">.</span>end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

index_t lookup_name<span class="Delimiter">(</span>const reagent&amp; r<span class="Delimiter">,</span> const recipe_number default_recipe<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> Name[default_recipe][r<span class="Delimiter">.</span>name]<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

type_number skip_addresses<span class="Delimiter">(</span>const vector&lt;type_number&gt;&amp; types<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  for <span class="Delimiter">(</span>index_t i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; types<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> != Type_number[<span class="Constant">&quot;address&quot;</span>]<span class="Delimiter">)</span> <span class="Identifier">return</span> types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  raise &lt;&lt; <span class="Constant">&quot;expected a container&quot;</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; die<span class="Delimiter">();</span>
  <span class="Identifier">return</span> -<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

int find_element_name<span class="Delimiter">(</span>const type_number t<span class="Delimiter">,</span> const string&amp; name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  const type_info&amp; container = Type[t]<span class="Delimiter">;</span>
<span class="CommentedCode">//?   cout &lt;&lt; &quot;looking for element &quot; &lt;&lt; name &lt;&lt; &quot; in type &quot; &lt;&lt; container.name &lt;&lt; &quot; with &quot; &lt;&lt; container.element_names.size() &lt;&lt; &quot; elements\n&quot;; //? 1</span>
  for <span class="Delimiter">(</span>index_t i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; container<span class="Delimiter">.</span>element_names<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>container<span class="Delimiter">.</span>element_names<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == name<span class="Delimiter">)</span> <span class="Identifier">return</span> i<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  raise &lt;&lt; <span class="Constant">&quot;unknown element &quot;</span> &lt;&lt; name &lt;&lt; <span class="Constant">&quot; in container &quot;</span> &lt;&lt; t &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; die<span class="Delimiter">();</span>
  <span class="Identifier">return</span> -<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

bool is_numeric_location<span class="Delimiter">(</span>const reagent&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>isa_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>is_raw<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>x<span class="Delimiter">.</span>name == <span class="Constant">&quot;0&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>  <span class="Comment">// used for chaining lexical scopes</span>
  <span class="Identifier">return</span> is_number<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

bool is_named_location<span class="Delimiter">(</span>const reagent&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>isa_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>is_raw<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>is_special_name<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Identifier">return</span> !is_number<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

bool is_raw<span class="Delimiter">(</span>const reagent&amp; r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  for <span class="Delimiter">(</span>index_t i = <span class="Comment">/*</span><span class="Comment">skip value+type</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span> i &lt; r<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>r<span class="Delimiter">.</span>properties<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first == <span class="Constant">&quot;raw&quot;</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="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

bool is_special_name<span class="Delimiter">(</span>const string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>s == <span class="Constant">&quot;_&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Comment">// lexical scopes</span>
  if <span class="Delimiter">(</span>s == <span class="Constant">&quot;default-space&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>s == <span class="Constant">&quot;0&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Comment">// tests will use these in later layers even though tests will mostly use numeric addresses</span>
  if <span class="Delimiter">(</span>s == <span class="Constant">&quot;screen&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>s == <span class="Constant">&quot;keyboard&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario convert_names_passes_dummy)</span>
<span class="Comment"># _ is just a dummy result that never gets consumed</span>
recipe main [
  _<span class="Delimiter">,</span> x:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>:literal<span class="Delimiter">,</span> <span class="Constant">1</span>:literal
]
<span class="traceContains">+name: assign x 1</span>
<span class="traceAbsent">-name: assign _ 1</span>

<span class="Comment">//: one reserved word that we'll need later</span>
<span class="Delimiter">:(scenario convert_names_passes_default_space)</span>
recipe main [
  default-space:number<span class="Delimiter">,</span> x:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>:literal<span class="Delimiter">,</span> <span class="Constant">1</span>:literal
]
<span class="traceContains">+name: assign x 1</span>
<span class="traceAbsent">-name: assign default-space 1</span>

<span class="Comment">//: an escape hatch to suppress name conversion that we'll use later</span>
<span class="Delimiter">:(scenario convert_names_passes_raw)</span>
recipe main [
  x:number/<span class="Special">raw &lt;- </span>copy <span class="Constant">0</span>:literal
]
<span class="traceAbsent">-name: assign x 1</span>

<span class="Delimiter">:(scenario convert_names_warns_when_mixing_names_and_numeric_locations)</span>
<span class="Special">% Hide_warnings = true;</span>
recipe main [
  x:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number
]
<span class="traceContains">+warn: mixing variable names and numeric addresses in main</span>

<span class="Delimiter">:(scenario convert_names_warns_when_mixing_names_and_numeric_locations2)</span>
<span class="Special">% Hide_warnings = true;</span>
recipe main [
  x:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:literal
  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy x:number
]
<span class="traceContains">+warn: mixing variable names and numeric addresses in main</span>

<span class="Delimiter">:(scenario convert_names_does_not_warn_when_mixing_names_and_raw_locations)</span>
<span class="Special">% Hide_warnings = true;</span>
recipe main [
  x:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number/<span class="Special">raw</span>
]
<span class="traceAbsent">-warn: mixing variable names and numeric addresses in main</span>

<span class="Delimiter">:(scenario convert_names_does_not_warn_when_mixing_names_and_literals)</span>
<span class="Special">% Hide_warnings = true;</span>
recipe main [
  x:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:literal
]
<span class="traceAbsent">-warn: mixing variable names and numeric addresses in main</span>

<span class="Delimiter">:(scenario convert_names_does_not_warn_when_mixing_special_names_and_numeric_locations)</span>
<span class="Special">% Hide_warnings = true;</span>
recipe main [
  screen:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number
]
<span class="traceAbsent">-warn: mixing variable names and numeric addresses in main</span>

<span class="SalientComment">//:: Support element names for containers in 'get' and 'get-address'.</span>

<span class="Comment">//: update our running example container for the next test</span>
<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
Type[point]<span class="Delimiter">.</span>element_names<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">&quot;x&quot;</span><span class="Delimiter">);</span>
Type[point]<span class="Delimiter">.</span>element_names<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span><span class="Constant">&quot;y&quot;</span><span class="Delimiter">);</span>
<span class="Delimiter">:(scenario convert_names_transforms_container_elements)</span>
recipe main [
  p:address:point<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>:literal  <span class="Comment"># unsafe</span>
  a:number<span class="Special"> &lt;- </span>get p:address:point/deref<span class="Delimiter">,</span> y:offset
  b:number<span class="Special"> &lt;- </span>get p:address:point/deref<span class="Delimiter">,</span> x:offset
]
<span class="traceContains">+name: element y of type point is at offset 1</span>
<span class="traceContains">+name: element x of type point is at offset 0</span>

<span class="Delimiter">:(after &quot;Per-recipe Transforms&quot;)</span>
<span class="Comment">// replace element names of containers with offsets</span>
if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation == Recipe_number[<span class="Constant">&quot;get&quot;</span>]
    || inst<span class="Delimiter">.</span>operation == Recipe_number[<span class="Constant">&quot;get-address&quot;</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// at least 2 args, and second arg is offset</span>
  assert<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>size<span class="Delimiter">()</span> &gt;= <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="CommentedCode">//?   cout &lt;&lt; inst.ingredients.at(1).to_string() &lt;&lt; '\n'; //? 1</span>
  assert<span class="Delimiter">(</span>isa_literal<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)));</span>
  if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name<span class="Delimiter">.</span>find_first_not_of<span class="Delimiter">(</span><span class="Constant">&quot;0123456789&quot;</span><span class="Delimiter">)</span> == string::npos<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
  <span class="Comment">// since first non-address in base type must be a container, we don't have to canonize</span>
  type_number base_type = skip_addresses<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>types<span class="Delimiter">);</span>
  inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>find_element_name<span class="Delimiter">(</span>base_type<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name<span class="Delimiter">));</span>
  trace<span class="Delimiter">(</span><span class="Constant">&quot;name&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;element &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; of type &quot;</span> &lt;&lt; Type[base_type]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; is at offset &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>value<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">//: this test is actually illegal so can't call run</span>
<span class="Delimiter">:(scenarios transform)</span>
<span class="Delimiter">:(scenario convert_names_handles_containers)</span>
recipe main [
  a:point<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>:literal
  b:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>:literal
]
<span class="traceContains">+name: assign a 1</span>
<span class="traceContains">+name: assign b 3</span>

<span class="SalientComment">//:: Support variant names for exclusive containers in 'maybe-convert'.</span>

<span class="Delimiter">:(scenarios run)</span>
<span class="Delimiter">:(scenario maybe_convert_named)</span>
recipe main [
  <span class="Constant">12</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:literal
  <span class="Constant">13</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>:literal
  <span class="Constant">14</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>:literal
  <span class="Constant">20</span>:address:point<span class="Special"> &lt;- </span>maybe-convert <span class="Constant">12</span>:number-or-point<span class="Delimiter">,</span> p:variant
]
<span class="traceContains">+name: variant p of type number-or-point has tag 1</span>
<span class="traceContains">+mem: storing 13 in location 20</span>

<span class="Delimiter">:(after &quot;Per-recipe Transforms&quot;)</span>
<span class="Comment">// convert variant names of exclusive containers</span>
if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation == Recipe_number[<span class="Constant">&quot;maybe-convert&quot;</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// at least 2 args, and second arg is offset</span>
  assert<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>size<span class="Delimiter">()</span> &gt;= <span class="Constant">2</span><span class="Delimiter">);</span>
  assert<span class="Delimiter">(</span>isa_literal<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)));</span>
  if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name<span class="Delimiter">.</span>find_first_not_of<span class="Delimiter">(</span><span class="Constant">&quot;0123456789&quot;</span><span class="Delimiter">)</span> == string::npos<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
  <span class="Comment">// since first non-address in base type must be an exclusive container, we don't have to canonize</span>
  type_number base_type = skip_addresses<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>types<span class="Delimiter">);</span>
  inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>set_value<span class="Delimiter">(</span>find_element_name<span class="Delimiter">(</span>base_type<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name<span class="Delimiter">));</span>
  trace<span class="Delimiter">(</span><span class="Constant">&quot;name&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;variant &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; of type &quot;</span> &lt;&lt; Type[base_type]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; has tag &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>value<span class="Delimiter">;</span>
<span class="Delimiter">}</span>
</pre>
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