mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

	Commit message (Expand)	Author	Age	Files	Lines
*	5852	Kartik Agaram	2020-01-01	1	-0/+422
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<span class="Comment">//: Writing to a literal (not computed) address of 0 in a recipe chains two</span>
<span class="Comment">//: spaces together. When a variable has a property of /space:1, it looks up</span>
<span class="Comment">//: the variable in the chained/surrounding space. /space:2 looks up the</span>
<span class="Comment">//: surrounding space of the surrounding space, etc.</span>

<span class="Delimiter">:(scenario closure)</span>
recipe main [
  default-space:address:array:location<span class="Special"> &lt;- </span>new location:type<span class="Delimiter">,</span> <span class="Constant">30</span>:literal
  <span class="Constant">1</span>:address:array:location/names:init-counter<span class="Special"> &lt;- </span>init-counter
<span class="CommentedCode">#?   $print [AAAAAAAAAAAAAAAA]</span>
<span class="CommentedCode">#?   $print 1:address:array:location</span>
  <span class="Constant">2</span>:number/<span class="Special">raw &lt;- </span>increment-counter <span class="Constant">1</span>:address:array:location/names:init-counter
  <span class="Constant">3</span>:number/<span class="Special">raw &lt;- </span>increment-counter <span class="Constant">1</span>:address:array:location/names:init-counter
]

recipe init-counter [
  default-space:address:array:location<span class="Special"> &lt;- </span>new location:type<span class="Delimiter">,</span> <span class="Constant">30</span>:literal
  x:number<span class="Special"> &lt;- </span>copy <span class="Constant">23</span>:literal
  y:number<span class="Special"> &lt;- </span>copy <span class="Constant">3</span>:literal  <span class="Comment"># variable that will be incremented</span>
  reply default-space:address:array:location
]

recipe increment-counter [
  default-space:address:array:location<span class="Special"> &lt;- </span>new space:literal<span class="Delimiter">,</span> <span class="Constant">30</span>:literal
  <span class="Constant">0</span>:address:array:location/names:init-counter<span class="Special"> &lt;- </span>next-ingredient  <span class="Comment"># outer space must be created by 'init-counter' above</span>
  y:number/space:<span class="Constant">1</span><span class="Special"> &lt;- </span>add y:number/space:<span class="Constant">1</span><span class="Delimiter">,</span> <span class="Constant">1</span>:literal  <span class="Comment"># increment</span>
  y:number<span class="Special"> &lt;- </span>copy <span class="Constant">234</span>:literal  <span class="Comment"># dummy</span>
  reply y:number/space:<span class="Constant">1</span>
]

<span class="traceContains">+name: recipe increment-counter is surrounded by init-counter</span>
<span class="traceContains">+mem: storing 5 in location 3</span>

<span class="Comment">//: To make this work, compute the recipe that provides names for the</span>
<span class="Comment">//: surrounding space of each recipe. This must happen before transform_names.</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;recipe_number<span class="Delimiter">,</span> recipe_number&gt; Surrounding_space<span class="Delimiter">;</span>

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

<span class="Delimiter">:(code)</span>
void collect_surrounding_spaces<span class="Delimiter">(</span>const recipe_number r<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; 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>
    const instruction&amp; inst = Recipe[r]<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>is_label<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    for <span class="Delimiter">(</span>index_t j = <span class="Constant">0</span><span class="Delimiter">;</span> j &lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++j<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      if <span class="Delimiter">(</span>isa_literal<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>name != <span class="Constant">&quot;0&quot;</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>types<span class="Delimiter">.</span>size<span class="Delimiter">()</span> != <span class="Constant">3</span>
          || inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != Type_number[<span class="Constant">&quot;address&quot;</span>]
          || inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)</span> != Type_number[<span class="Constant">&quot;array&quot;</span>]
          || inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">)</span> != Type_number[<span class="Constant">&quot;location&quot;</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
        raise &lt;&lt; <span class="Constant">&quot;slot 0 should always have type address:array:location, but is &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
        <span class="Identifier">continue</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
      vector&lt;string&gt; s = property<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">),</span> <span class="Constant">&quot;names&quot;</span><span class="Delimiter">);</span>
      if <span class="Delimiter">(</span>s<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
        raise &lt;&lt; <span class="Constant">&quot;slot 0 requires a /names property in recipe &quot;</span> &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; die<span class="Delimiter">();</span>
      if <span class="Delimiter">(</span>s<span class="Delimiter">.</span>size<span class="Delimiter">()</span> &gt; <span class="Constant">1</span><span class="Delimiter">)</span> raise &lt;&lt; <span class="Constant">&quot;slot 0 should have a single value in /names, got &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>j<span class="Delimiter">).</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
      string surrounding_recipe_name = s<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
      if <span class="Delimiter">(</span>Surrounding_space<span class="Delimiter">.</span>find<span class="Delimiter">(</span>r<span class="Delimiter">)</span> != Surrounding_space<span class="Delimiter">.</span>end<span class="Delimiter">()</span>
          &amp;&amp; Surrounding_space[r] != Recipe_number[surrounding_recipe_name]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
        raise &lt;&lt; <span class="Constant">&quot;recipe &quot;</span> &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; can have only one 'surrounding' recipe but has &quot;</span> &lt;&lt; Recipe[Surrounding_space[r]]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; and &quot;</span> &lt;&lt; surrounding_recipe_name &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
        <span class="Identifier">continue</span><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;recipe &quot;</span> &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; is surrounded by &quot;</span> &lt;&lt; surrounding_recipe_name<span class="Delimiter">;</span>
      Surrounding_space[r] = Recipe_number[surrounding_recipe_name]<span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Comment">//: Once surrounding spaces are available, transform_names uses them to handle</span>
<span class="Comment">//: /space properties.</span>

<span class="Delimiter">:(replace{} &quot;index_t lookup_name(const reagent&amp; r, const recipe_number default_recipe)&quot;)</span>
index_t lookup_name<span class="Delimiter">(</span>const reagent&amp; x<span class="Delimiter">,</span> const recipe_number default_recipe<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//?   cout &lt;&lt; &quot;AAA &quot; &lt;&lt; default_recipe &lt;&lt; &quot; &quot; &lt;&lt; Recipe[default_recipe].name &lt;&lt; '\n'; //? 2</span>
<span class="CommentedCode">//?   cout &lt;&lt; &quot;AAA &quot; &lt;&lt; x.to_string() &lt;&lt; '\n'; //? 1</span>
  if <span class="Delimiter">(</span>!has_property<span class="Delimiter">(</span>x<span class="Delimiter">,</span> <span class="Constant">&quot;space&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
    if <span class="Delimiter">(</span>Name[default_recipe]<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> raise &lt;&lt; <span class="Constant">&quot;name not found: &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>name &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; die<span class="Delimiter">();</span>
    <span class="Identifier">return</span> Name[default_recipe][x<span class="Delimiter">.</span>name]<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  vector&lt;string&gt; p = property<span class="Delimiter">(</span>x<span class="Delimiter">,</span> <span class="Constant">&quot;space&quot;</span><span class="Delimiter">);</span>
  if <span class="Delimiter">(</span>p<span class="Delimiter">.</span>size<span class="Delimiter">()</span> != <span class="Constant">1</span><span class="Delimiter">)</span> raise &lt;&lt; <span class="Constant">&quot;/space property should have exactly one (non-negative integer) value</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
  int n = to_number<span class="Delimiter">(</span>p<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
  assert<span class="Delimiter">(</span>n &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
  recipe_number surrounding_recipe = lookup_surrounding_recipe<span class="Delimiter">(</span>default_recipe<span class="Delimiter">,</span> n<span class="Delimiter">);</span>
  set&lt;recipe_number&gt; done<span class="Delimiter">;</span>
  vector&lt;recipe_number&gt; path<span class="Delimiter">;</span>
  <span class="Identifier">return</span> lookup_name<span class="Delimiter">(</span>x<span class="Delimiter">,</span> surrounding_recipe<span class="Delimiter">,</span> done<span class="Delimiter">,</span> path<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Comment">// If the recipe we need to lookup this name in doesn't have names done yet,</span>
<span class="Comment">// recursively call transform_names on it.</span>
index_t lookup_name<span class="Delimiter">(</span>const reagent&amp; x<span class="Delimiter">,</span> const recipe_number r<span class="Delimiter">,</span> set&lt;recipe_number&gt;&amp; done<span class="Delimiter">,</span> vector&lt;recipe_number&gt;&amp; path<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>!Name[r]<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> Name[r][x<span class="Delimiter">.</span>name]<span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>done<span class="Delimiter">.</span>find<span class="Delimiter">(</span>r<span class="Delimiter">)</span> != done<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    raise &lt;&lt; <span class="Constant">&quot;can't compute address of &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>to_string<span class="Delimiter">()</span> &lt;&lt; <span class="Constant">&quot; because &quot;</span><span class="Delimiter">;</span>
    for <span class="Delimiter">(</span>index_t i = <span class="Constant">1</span><span class="Delimiter">;</span> i &lt; path<span class="Delimiter">.</span>size<span class="Delimiter">();</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      raise &lt;&lt; path<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i-<span class="Constant">1</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; requires computing names of &quot;</span> &lt;&lt; path<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
    raise &lt;&lt; path<span class="Delimiter">.</span>at<span class="Delimiter">(</span>path<span class="Delimiter">.</span>size<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; requires computing names of &quot;</span> &lt;&lt; r &lt;&lt; <span class="Constant">&quot;..ad infinitum</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; die<span class="Delimiter">();</span>
    <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  done<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  path<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  transform_names<span class="Delimiter">(</span>r<span class="Delimiter">);</span>  <span class="Comment">// Not passing 'done' through. Might this somehow cause an infinite loop?</span>
  assert<span class="Delimiter">(</span>!Name[r]<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
  <span class="Identifier">return</span> Name[r][x<span class="Delimiter">.</span>name]<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

recipe_number lookup_surrounding_recipe<span class="Delimiter">(</span>const recipe_number r<span class="Delimiter">,</span> index_t n<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>n == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> r<span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>Surrounding_space<span class="Delimiter">.</span>find<span class="Delimiter">(</span>r<span class="Delimiter">)</span> == Surrounding_space<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    raise &lt;&lt; <span class="Constant">&quot;don't know surrounding recipe of &quot;</span> &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
    <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  assert<span class="Delimiter">(</span>Surrounding_space[r]<span class="Delimiter">);</span>
  <span class="Identifier">return</span> lookup_surrounding_recipe<span class="Delimiter">(</span>Surrounding_space[r]<span class="Delimiter">,</span> n-<span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Comment">//: weaken use-before-set warnings just a tad</span>
<span class="Delimiter">:(replace{} &quot;bool already_transformed(const reagent&amp; r, const map&lt;string, index_t&gt;&amp; names)&quot;)</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>
  if <span class="Delimiter">(</span>has_property<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;space&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
    vector&lt;string&gt; p = property<span class="Delimiter">(</span>r<span class="Delimiter">,</span> <span class="Constant">&quot;space&quot;</span><span class="Delimiter">);</span>
    assert<span class="Delimiter">(</span>p<span class="Delimiter">.</span>size<span class="Delimiter">()</span> == <span class="Constant">1</span><span class="Delimiter">);</span>
    if <span class="Delimiter">(</span>p<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> != <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="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>
</pre>
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