2175

author: Kartik K. Agaram <vc@akkartik.com> 2015-09-06 16:35:46 -0700
committer: Kartik K. Agaram <vc@akkartik.com> 2015-09-06 16:35:46 -0700
commit: 0e4a335edc7d4e584924fd6b298156e45d2626c8 (patch)
tree: 4bde00176d6d00b72462e856974fecd4411ef025 /html/041jump_label.cc.html
parent: 3cf4cc43f2622816777c22c49c32e5159574a1d3 (diff)
download: mu-0e4a335edc7d4e584924fd6b298156e45d2626c8.tar.gz
1 files changed, 0 insertions, 149 deletions
diff --git a/html/041jump_label.cc.html b/html/041jump_label.cc.html
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-<title>Mu - 041jump_label.cc</title>
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-
--->
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-<pre id='vimCodeElement'>
-<span class="Comment">//: Support jumps to labels.</span>
-<span class="Comment">//: We'll also treat 'break' and 'loop' as jumps. The choice of name is</span>
-<span class="Comment">//: just documentation about intent; use 'break' to indicate you're exiting</span>
-<span class="Comment">//: one or more loop nests, and 'loop' to indicate you're skipping to the next</span>
-<span class="Comment">//: iteration of some containing loop nest.</span>
-
-<span class="Delimiter">:(scenario jump_to_label)</span>
-recipe main [
-  jump +target:label
-  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-  +target
-]
-<span class="traceAbsent">-mem: storing 0 in location 1</span>
-
-<span class="Delimiter">:(before &quot;End Mu Types Initialization&quot;)</span>
-Type_ordinal[<span class="Constant">&quot;label&quot;</span>] = <span class="Constant">0</span><span class="Delimiter">;</span>
-
-<span class="Delimiter">:(after &quot;int main&quot;)</span>
-  Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>transform_labels<span class="Delimiter">);</span>
-
-<span class="Delimiter">:(code)</span>
-void transform_labels<span class="Delimiter">(</span>const recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  map&lt;string<span class="Delimiter">,</span> long long int&gt; offset<span class="Delimiter">;</span>
-  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>Recipe[r]<span class="Delimiter">.</span>steps<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>label<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> offset[inst<span class="Delimiter">.</span>label] = i<span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>Recipe[r]<span class="Delimiter">.</span>steps<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>
-    if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;jump&quot;</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      replace_offset<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> offset<span class="Delimiter">,</span> i<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
-    <span class="Delimiter">}</span>
-    if <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;jump-if&quot;</span>] || inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;jump-unless&quot;</span>]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      replace_offset<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> offset<span class="Delimiter">,</span> i<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
-    <span class="Delimiter">}</span>
-    if <span class="Delimiter">((</span>inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;loop&quot;</span>] || inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;break&quot;</span>]<span class="Delimiter">)</span>
-        &amp;&amp; SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      replace_offset<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> offset<span class="Delimiter">,</span> i<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
-    <span class="Delimiter">}</span>
-    if <span class="Delimiter">((</span>inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;loop-if&quot;</span>] || inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;loop-unless&quot;</span>]
-            || inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;break-if&quot;</span>] || inst<span class="Delimiter">.</span>operation == Recipe_ordinal[<span class="Constant">&quot;break-unless&quot;</span>]<span class="Delimiter">)</span>
-        &amp;&amp; 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>
-      replace_offset<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> offset<span class="Delimiter">,</span> i<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
-    <span class="Delimiter">}</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(code)</span>
-void replace_offset<span class="Delimiter">(</span>reagent&amp; x<span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">const</span><span class="Comment">*/</span> map&lt;string<span class="Delimiter">,</span> long long int&gt;&amp; offset<span class="Delimiter">,</span> const long long int current_offset<span class="Delimiter">,</span> const recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  if <span class="Delimiter">(</span>!is_literal<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    raise &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;: jump target must be offset or label but is &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>original_string &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>
-  assert<span class="Delimiter">(</span>!x<span class="Delimiter">.</span>initialized<span class="Delimiter">);</span>
-  if <span class="Delimiter">(</span>is_integer<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Identifier">return</span><span class="Delimiter">;</span>  <span class="Comment">// non-labels will be handled like other number operands</span>
-  if <span class="Delimiter">(</span>offset<span class="Delimiter">.</span>find<span class="Delimiter">(</span>x<span class="Delimiter">.</span>name<span class="Delimiter">)</span> == offset<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
-    raise &lt;&lt; Recipe[r]<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;: can't find label &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>name &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
-  x<span class="Delimiter">.</span>set_value<span class="Delimiter">(</span>offset[x<span class="Delimiter">.</span>name]-current_offset<span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(scenario break_to_label)</span>
-recipe main [
-<span class="CommentedCode">#?   $print [aaa]</span>
-  <span class="Delimiter">{</span>
-    <span class="Delimiter">{</span>
-      <span class="Identifier">break</span> +target:label
-      <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-    <span class="Delimiter">}</span>
-  <span class="Delimiter">}</span>
-  +target
-]
-<span class="traceAbsent">-mem: storing 0 in location 1</span>
-
-<span class="Delimiter">:(scenario jump_if_to_label)</span>
-recipe main [
-  <span class="Delimiter">{</span>
-    <span class="Delimiter">{</span>
-      jump-if <span class="Constant">1</span><span class="Delimiter">,</span> +target:label
-      <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-    <span class="Delimiter">}</span>
-  <span class="Delimiter">}</span>
-  +target
-]
-<span class="traceAbsent">-mem: storing 0 in location 1</span>
-
-<span class="Delimiter">:(scenario loop_unless_to_label)</span>
-recipe main [
-  <span class="Delimiter">{</span>
-    <span class="Delimiter">{</span>
-      loop-unless <span class="Constant">0</span><span class="Delimiter">,</span> +target:label  <span class="Comment"># loop/break with a label don't care about braces</span>
-      <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-    <span class="Delimiter">}</span>
-  <span class="Delimiter">}</span>
-  +target
-]
-<span class="traceAbsent">-mem: storing 0 in location 1</span>
-
-<span class="Delimiter">:(scenario jump_runs_code_after_label)</span>
-recipe main [
-  <span class="Comment"># first a few lines of padding to exercise the offset computation</span>
-  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-  <span class="Constant">3</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-  jump +target:label
-  <span class="Constant">4</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-  +target
-  <span class="Constant">5</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
-]
-<span class="traceContains">+mem: storing 0 in location 5</span>
-<span class="traceAbsent">-mem: storing 0 in location 4</span>
-</pre>
-</body>
-</html>
-<!-- vim: set foldmethod=manual : -->
author	Kartik K. Agaram <vc@akkartik.com>	2015-09-06 16:35:46 -0700
committer	Kartik K. Agaram <vc@akkartik.com>	2015-09-06 16:35:46 -0700
commit	0e4a335edc7d4e584924fd6b298156e45d2626c8 (patch)
tree	4bde00176d6d00b72462e856974fecd4411ef025 /html/041jump_label.cc.html
parent	3cf4cc43f2622816777c22c49c32e5159574a1d3 (diff)
download	mu-0e4a335edc7d4e584924fd6b298156e45d2626c8.tar.gz