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<pre id='vimCodeElement'>
<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 transform_names)</span>
def main [
  <span class="Normal">x</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+name: assign x 1</span>
<span class="traceContains">+mem: storing 0 in location 1</span>

<span class="Delimiter">:(scenarios transform)</span>
<span class="Delimiter">:(scenario transform_names_fails_on_use_before_define)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  <span class="Normal">x</span>:number<span class="Special"> &lt;- </span>copy y:number
]
<span class="traceContains">+error: main: use before set: y</span>
<span class="Comment"># todo: detect conditional defines</span>

<span class="Delimiter">:(after &quot;End Type Modifying Transforms&quot;)</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>transform_names<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;recipe_ordinal<span class="Delimiter">,</span> map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt; &gt; Name<span class="Delimiter">;</span>

<span class="Comment">//: the Name map is a global, so save it before tests and reset it for every</span>
<span class="Comment">//: test, just to be safe.</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;recipe_ordinal<span class="Delimiter">,</span> map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt; &gt; Name_snapshot<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End save_snapshots&quot;)</span>
Name_snapshot = Name<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End restore_snapshots&quot;)</span>
Name = Name_snapshot<span class="Delimiter">;</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> transform_names<span class="Delimiter">(</span><span class="Normal">const</span> recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  recipe&amp; caller = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- transform names for recipe &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
<span class="CommentedCode">//?   cerr &lt;&lt; &quot;--- transform names for recipe &quot; &lt;&lt; caller.name &lt;&lt; '\n';</span>
  <span class="Normal">bool</span> names_used = <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">bool</span> numeric_locations_used = <span class="Constant">false</span><span class="Delimiter">;</span>
  map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt;&amp; names = Name[r]<span class="Delimiter">;</span>
  <span class="Comment">// store the indices 'used' so far in the map</span>
  <span class="Normal">int</span>&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>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    instruction&amp; inst = caller<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    <span class="Comment">// End transform_names(inst) Special-cases</span>
    <span class="Comment">// map names to addresses</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> in = <span class="Constant">0</span><span class="Delimiter">;</span> in &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>is_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> inst<span class="Delimiter">,</span> caller<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      <span class="Normal">if</span> <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>
      <span class="Normal">if</span> <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>
      <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>in<span class="Delimiter">).</span>name<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      <span class="Normal">if</span> <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; maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &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="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Delimiter">}</span>
      <span class="Normal">int</span> v = 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="Normal">if</span> <span class="Delimiter">(</span>v &gt;= <span class="Constant">0</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>v<span class="Delimiter">);</span>
      <span class="Delimiter">}</span>
      <span class="Normal">else</span> <span class="Delimiter">{</span>
        raise &lt;&lt; maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;can't find a place to store &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="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
        <span class="Identifier">return</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
    <span class="Delimiter">}</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> out = <span class="Constant">0</span><span class="Delimiter">;</span> out &lt; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++out<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>is_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> inst<span class="Delimiter">,</span> caller<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      <span class="Normal">if</span> <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>
      <span class="Normal">if</span> <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>
      <span class="Normal">if</span> <span class="Delimiter">(</span>is_integer<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> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      <span class="Normal">if</span> <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">9993</span><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 &lt;&lt; end<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>
      <span class="Normal">int</span> v = 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="Normal">if</span> <span class="Delimiter">(</span>v &gt;= <span class="Constant">0</span><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>v<span class="Delimiter">);</span>
      <span class="Delimiter">}</span>
      <span class="Normal">else</span> <span class="Delimiter">{</span>
        raise &lt;&lt; maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;can't find a place to store &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="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
        <span class="Identifier">return</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>names_used &amp;&amp; numeric_locations_used<span class="Delimiter">)</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;mixing variable names and numeric addresses</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> is_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="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; recipe_name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!x<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// End Null-type is_disqualified Exceptions</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>recipe_name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;missing type for &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot; in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <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>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Comment">// End is_disqualified Cases</span>
  <span class="Normal">if</span> <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>

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

<span class="Normal">int</span> lookup_name<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; r<span class="Delimiter">,</span> <span class="Normal">const</span> recipe_ordinal 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_ordinal skip_addresses<span class="Delimiter">(</span>type_tree* type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  type_ordinal address = get<span class="Delimiter">(</span>Type_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;address&quot;</span><span class="Delimiter">);</span>
  <span class="Normal">for</span> <span class="Delimiter">(;</span> type<span class="Delimiter">;</span> type = type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>type<span class="Delimiter">-&gt;</span>value != address<span class="Delimiter">)</span>
      <span class="Identifier">return</span> type<span class="Delimiter">-&gt;</span>value<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> -<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">int</span> find_element_name<span class="Delimiter">(</span><span class="Normal">const</span> type_ordinal t<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; name<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; recipe_name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">const</span> type_info&amp; container = get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> t<span class="Delimiter">);</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>container<span class="Delimiter">.</span>elements<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>container<span class="Delimiter">.</span>elements<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>name == name<span class="Delimiter">)</span> <span class="Identifier">return</span> i<span class="Delimiter">;</span>
  raise &lt;&lt; maybe<span class="Delimiter">(</span>recipe_name<span class="Delimiter">)</span> &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; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> t<span class="Delimiter">).</span>name &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Identifier">return</span> -<span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> is_numeric_location<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>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>
  <span class="Normal">if</span> <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_integer<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> is_named_location<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>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>
  <span class="Normal">if</span> <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_integer<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> is_special_name<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <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="Normal">if</span> <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">// End is_special_name Cases</span>
  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario transform_names_supports_containers)</span>
def main [
  <span class="Normal">x</span>:point<span class="Special"> &lt;- </span>merge <span class="Constant">34</span><span class="Delimiter">,</span> <span class="Constant">35</span>
  <span class="Normal">y</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">3</span>
]
<span class="traceContains">+name: assign x 1</span>
<span class="Comment"># skip location 2 because x occupies two locations</span>
<span class="traceContains">+name: assign y 3</span>

<span class="Delimiter">:(scenario transform_names_supports_static_arrays)</span>
def main [
  <span class="Normal">x</span>:array:number:<span class="Constant">3</span><span class="Special"> &lt;- </span>create-array
  <span class="Normal">y</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">3</span>
]
<span class="traceContains">+name: assign x 1</span>
<span class="Comment"># skip locations 2, 3, 4 because x occupies four locations</span>
<span class="traceContains">+name: assign y 5</span>

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

<span class="Comment">//: an escape hatch to suppress name conversion that we'll use later</span>
<span class="Delimiter">:(scenarios run)</span>
<span class="Delimiter">:(scenario transform_names_passes_raw)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  <span class="Normal">x</span>:number/<span class="Special">raw &lt;- </span>copy <span class="Constant">0</span>
]
<span class="traceAbsent">-name: assign x 1</span>
<span class="traceContains">+error: can't write to location 0 in 'x:number/raw &lt;- copy 0'</span>

<span class="Delimiter">:(scenarios transform)</span>
<span class="Delimiter">:(scenario transform_names_fails_when_mixing_names_and_numeric_locations)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  <span class="Normal">x</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number
]
<span class="traceContains">+error: main: mixing variable names and numeric addresses</span>

<span class="Delimiter">:(scenario transform_names_fails_when_mixing_names_and_numeric_locations_2)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  <span class="Normal">x</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy x:number
]
<span class="traceContains">+error: main: mixing variable names and numeric addresses</span>

<span class="Delimiter">:(scenario transform_names_does_not_fail_when_mixing_names_and_raw_locations)</span>
def main [
  <span class="Normal">x</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number/<span class="Special">raw</span>
]
<span class="traceAbsent">-error: main: mixing variable names and numeric addresses</span>
$error: <span class="Constant">0</span>

<span class="Delimiter">:(scenario transform_names_does_not_fail_when_mixing_names_and_literals)</span>
def main [
  <span class="Normal">x</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceAbsent">-error: main: mixing variable names and numeric addresses</span>
$error: <span class="Constant">0</span>

<span class="SalientComment">//:: Support element names for containers in 'get' and 'get-location' and 'put'.</span>
<span class="Comment">//: (get-location is implemented later)</span>

<span class="Delimiter">:(scenario transform_names_transforms_container_elements)</span>
def main [
  <span class="Normal">p</span>:address:point<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
  <span class="Normal">a</span>:number<span class="Special"> &lt;- </span>get *p:address:point<span class="Delimiter">,</span> y:offset
  <span class="Normal">b</span>:number<span class="Special"> &lt;- </span>get *p:address:point<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">:(before &quot;End transform_names(inst) Special-cases&quot;)</span>
<span class="Comment">// replace element names of containers with offsets</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;get&quot;</span> || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;get-location&quot;</span> || inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;put&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">//: avoid raising any errors here; later layers will support overloading new</span>
  <span class="Comment">//: instructions with the same names (static dispatch), which could lead to</span>
  <span class="Comment">//: spurious errors</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> &lt; <span class="Constant">2</span><span class="Delimiter">)</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</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">1</span><span class="Delimiter">)))</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</span>
  <span class="Normal">if</span> <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="Delimiter">{</span>
    <span class="Comment">// since first non-address in base type must be a container, we don't have to canonize</span>
    type_ordinal 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>type<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>base_type == -<span class="Constant">1</span><span class="Delimiter">)</span>
      <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// error raised elsewhere</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">))</span> <span class="Delimiter">{</span>  <span class="Comment">// otherwise we'll raise an error elsewhere</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> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">));</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><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; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; is at offset &quot;</span> &lt;&lt; no_scientific<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>value<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Delimiter">}</span>
  <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 transform_names_handles_containers)</span>
def main [
  <span class="Normal">a</span>:point<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
  <span class="Normal">b</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
]
<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 transform_names_handles_exclusive_containers)</span>
def main [
  <span class="Constant">12</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
  <span class="Constant">13</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">35</span>
  <span class="Constant">14</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">36</span>
  <span class="Constant">20</span>:point<span class="Delimiter">,</span> <span class="Constant">22</span>:boolean<span class="Special"> &lt;- </span>maybe-convert <span class="Constant">12</span>:number-<span class="Normal">or</span>-point/unsafe<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 35 in location 20</span>
<span class="traceContains">+mem: storing 36 in location 21</span>
<span class="traceContains">+mem: storing 1 in location 22</span>

<span class="Delimiter">:(before &quot;End transform_names(inst) Special-cases&quot;)</span>
<span class="Comment">// convert variant names of exclusive containers</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;maybe-convert&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</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">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;exactly 2 ingredients expected in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<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">1</span><span class="Delimiter">)));</span>
  <span class="Normal">if</span> <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="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_ordinal 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>type<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>base_type == -<span class="Constant">1</span><span class="Delimiter">)</span>
      raise &lt;&lt; maybe<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;expected an exclusive-container in '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">))</span> <span class="Delimiter">{</span>  <span class="Comment">// otherwise we'll raise an error elsewhere</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> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>name<span class="Delimiter">));</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><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; get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> base_type<span class="Delimiter">).</span>name &lt;&lt; <span class="Constant">&quot; has tag &quot;</span> &lt;&lt; no_scientific<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>value<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>
</pre>
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