run_one_test


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#!/usr/bin/env zsh
# Either run the test with the given name, or rerun the most recently run test.
# Intended to be called from within Vim. Check out the vimrc.vim file.
# Unfortunately this only works with Linux at the moment. Some compiler passes
# take too long to run in emulated mode.

if [[ $2 == 'test-'* ]]
then
  TEST_NAME=$2 envsubst '$TEST_NAME' < run_one_test.subx > /tmp/run_one_test.subx
  FILES=$(ls [0-9]*.subx apps/subx-params.subx $1 |sort |uniq)
  echo $FILES > /tmp/last_run_files
elif [[ -e /tmp/last_run_files ]]
then
  FILES=$(cat /tmp/last_run_files)
else
  echo "no test found"
  exit 0  # don't open trace
fi

set -e

./translate_subx_debug init.linux $(echo $FILES) /tmp/run_one_test.subx
echo running
CFLAGS=$CFLAGS ./bootstrap --trace run a.elf
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<span class="Comment">//: Phase 3: Start running a loaded and transformed recipe.</span>
<span class="Comment">//:</span>
<span class="Comment">//: So far we've seen recipes as lists of instructions, and instructions point</span>
<span class="Comment">//: at other recipes. To kick things off mu needs to know how to run certain</span>
<span class="Comment">//: 'primitive' recipes. That will then give the ability to run recipes</span>
<span class="Comment">//: containing these primitives.</span>
<span class="Comment">//:</span>
<span class="Comment">//: This layer defines a skeleton with just two primitive recipes: IDLE which</span>
<span class="Comment">//: does nothing, and COPY, which can copy numbers from one memory location to</span>
<span class="Comment">//: another. Later layers will add more primitives.</span>

<span class="Delimiter">:(scenario copy_literal)</span>
def main [
  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">23</span>
]
<span class="traceContains">+run: {1: &quot;number&quot;} &lt;- copy {23: &quot;literal&quot;}</span>
<span class="traceContains">+mem: storing 23 in location 1</span>

<span class="Delimiter">:(scenario copy)</span>
def main [
  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">23</span>
  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number
]
<span class="traceContains">+run: {2: &quot;number&quot;} &lt;- copy {1: &quot;number&quot;}</span>
<span class="traceContains">+mem: location 1 is 23</span>
<span class="traceContains">+mem: storing 23 in location 2</span>

<span class="Delimiter">:(scenario copy_multiple)</span>
def main [
  <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">23</span><span class="Delimiter">,</span> <span class="Constant">24</span>
]
<span class="traceContains">+mem: storing 23 in location 1</span>
<span class="traceContains">+mem: storing 24 in location 2</span>

<span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span class="Comment">// Book-keeping while running a recipe.</span>
<span class="Comment">//: Later layers will replace this to support running multiple routines at once.</span>
<span class="Normal">struct</span> routine <span class="Delimiter">{</span>
  recipe_ordinal running_recipe<span class="Delimiter">;</span>
  <span class="Normal">int</span> running_step_index<span class="Delimiter">;</span>
  routine<span class="Delimiter">(</span>recipe_ordinal r<span class="Delimiter">)</span> :running_recipe<span class="Delimiter">(</span>r<span class="Delimiter">),</span> running_step_index<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{}</span>
  <span class="Normal">bool</span> completed<span class="Delimiter">()</span> <span class="Normal">const</span><span class="Delimiter">;</span>
  <span class="Normal">const</span> vector&lt;instruction&gt;&amp; steps<span class="Delimiter">()</span> <span class="Normal">const</span><span class="Delimiter">;</span>
<span class="Delimiter">};</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
routine* Current_routine = <span class="Constant">NULL</span><span class="Delimiter">;</span>
map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt; Instructions_running<span class="Delimiter">;</span>
map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt; Locations_read<span class="Delimiter">;</span>
map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt; Locations_read_by_instruction<span class="Delimiter">;</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> run<span class="Delimiter">(</span>recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  routine rr<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
  Current_routine = &amp;rr<span class="Delimiter">;</span>
  run_current_routine<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> run_current_routine<span class="Delimiter">()</span>
<span class="Delimiter">{</span>  <span class="Comment">// curly on a separate line, because later layers will modify header</span>
  <span class="Normal">while</span> <span class="Delimiter">(</span>!Current_routine<span class="Delimiter">-&gt;</span>completed<span class="Delimiter">())</span>  <span class="Comment">// later layers will modify condition</span>
  <span class="Delimiter">{</span>
    <span class="Comment">// Running One Instruction</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>is_label<span class="Delimiter">)</span> <span class="Delimiter">{</span> ++current_step_index<span class="Delimiter">();</span> <span class="Identifier">continue</span><span class="Delimiter">;</span> <span class="Delimiter">}</span>
    trace<span class="Delimiter">(</span>Initial_callstack_depth + Trace_stream<span class="Delimiter">-&gt;</span>callstack_depth<span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; to_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">)</span> != <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      raise &lt;&lt; <span class="Constant">&quot;something wrote to location 0; this should never happen</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
      put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
    <span class="Delimiter">}</span>
    <span class="Comment">// read all ingredients from memory, each potentially spanning multiple locations</span>
    vector&lt;vector&lt;<span class="Normal">double</span>&gt; &gt; ingredients<span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>should_copy_ingredients<span class="Delimiter">())</span> <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>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
        ingredients<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>read_memory<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)));</span>
    <span class="Delimiter">}</span>
    <span class="Comment">// instructions below will write to 'products'</span>
    vector&lt;vector&lt;<span class="Normal">double</span>&gt; &gt; products<span class="Delimiter">;</span>
    <span class="Normal">switch</span> <span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>operation<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Comment">// Primitive Recipe Implementations</span>
      <span class="Normal">case</span> COPY: <span class="Delimiter">{</span>
        copy<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> ingredients<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> inserter<span class="Delimiter">(</span>products<span class="Delimiter">,</span> products<span class="Delimiter">.</span>begin<span class="Delimiter">()));</span>
        <span class="Identifier">break</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
      <span class="Comment">// End Primitive Recipe Implementations</span>
      <span class="Normal">default</span>: <span class="Delimiter">{</span>
        cout &lt;&lt; <span class="Constant">&quot;not a primitive op: &quot;</span> &lt;&lt; current_instruction<span class="Delimiter">().</span>operation &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
      <span class="Delimiter">}</span>
    <span class="Delimiter">}</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>products<span class="Delimiter">)</span> &lt; SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">))</span> <span class="Delimiter">{</span>
      raise &lt;&lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; vs &quot;</span> &lt;&lt; SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;: failed to write to all products! &quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">())</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Delimiter">}</span>
    <span class="Normal">else</span> <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>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
        write_memory<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> i<span class="Delimiter">);</span>
    <span class="Delimiter">}</span>
    <span class="Comment">// End of Instruction</span>
    <span class="Normal">finish_instruction</span>:<span class="Delimiter">;</span>
    ++current_step_index<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
  <span class="Normal">stop_running_current_routine</span>:<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> should_copy_ingredients<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// End should_copy_ingredients Special-cases</span>
  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">//: Some helpers.</span>
<span class="Comment">//: We'll need to override these later as we change the definition of routine.</span>
<span class="Comment">//: Important that they return referrences into the routine.</span>

<span class="Normal">inline</span> <span class="Normal">int</span>&amp; current_step_index<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> Current_routine<span class="Delimiter">-&gt;</span>running_step_index<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">inline</span> <span class="Normal">const</span> string&amp; current_recipe_name<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-&gt;</span>running_recipe<span class="Delimiter">).</span>name<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">inline</span> <span class="Normal">const</span> instruction&amp; current_instruction<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-&gt;</span>running_recipe<span class="Delimiter">).</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>Current_routine<span class="Delimiter">-&gt;</span>running_step_index<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">inline</span> <span class="Normal">bool</span> routine::completed<span class="Delimiter">()</span> <span class="Normal">const</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> running_step_index &gt;= SIZE<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> running_recipe<span class="Delimiter">).</span>steps<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">inline</span> <span class="Normal">const</span> vector&lt;instruction&gt;&amp; routine::steps<span class="Delimiter">()</span> <span class="Normal">const</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> running_recipe<span class="Delimiter">).</span>steps<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="SalientComment">//:: Startup flow</span>

<span class="Comment">//: Step 1: load all .mu files with numeric prefixes (in order)</span>
<span class="Delimiter">:(before &quot;End Load Recipes&quot;)</span>
<span class="Comment">// Load .mu Core</span>
<span class="CommentedCode">//? Save_trace = true;</span>
<span class="CommentedCode">//? START_TRACING_UNTIL_END_OF_SCOPE;</span>
load_file_or_directory<span class="Delimiter">(</span><span class="Constant">&quot;core.mu&quot;</span><span class="Delimiter">);</span>
<span class="CommentedCode">//? DUMP(&quot;&quot;);</span>
<span class="CommentedCode">//? exit(0);</span>

<span class="Comment">//: Step 2: load any .mu files provided at the commandline</span>
<span class="Delimiter">:(before &quot;End Commandline Parsing&quot;)</span>
<span class="Comment">// Check For .mu Files</span>
<span class="CommentedCode">//? START_TRACING_UNTIL_END_OF_SCOPE</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>argc &gt; <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// skip argv[0]</span>
  argv++<span class="Delimiter">;</span>
  argc--<span class="Delimiter">;</span>
  <span class="Comment">// ignore argv past '--'; that's commandline args for 'main'</span>
  <span class="Normal">while</span> <span class="Delimiter">(</span>argc &gt; <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>string<span class="Delimiter">(</span>*argv<span class="Delimiter">)</span> == <span class="Constant">&quot;--&quot;</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
    load_file_or_directory<span class="Delimiter">(</span>*argv<span class="Delimiter">);</span>
    --argc<span class="Delimiter">;</span>
    ++argv<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>Run_tests<span class="Delimiter">)</span> Recipe<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">));</span>
<span class="Delimiter">}</span>
transform_all<span class="Delimiter">();</span>
<span class="CommentedCode">//? DUMP(&quot;&quot;);</span>
<span class="CommentedCode">//? exit(0);</span>
save_snapshots<span class="Delimiter">();</span>

<span class="Comment">//: Step 3: if we aren't running tests, locate a recipe called 'main' and</span>
<span class="Comment">//: start running it.</span>
<span class="Delimiter">:(before &quot;End Main&quot;)</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>!Run_tests &amp;&amp; contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">)</span> &amp;&amp; contains_key<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
  <span class="Comment">// Running Main</span>
  setup<span class="Delimiter">();</span>
<span class="CommentedCode">//?   Save_trace = true;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_main<span class="Delimiter">)</span> Trace_stream = <span class="Normal">new</span> trace_stream<span class="Delimiter">;</span>
  trace<span class="Delimiter">(</span><span class="Constant">9990</span><span class="Delimiter">,</span> <span class="Constant">&quot;run&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;=== Starting to run&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
  assert<span class="Delimiter">(</span>Num_calls_to_transform_all == <span class="Constant">1</span><span class="Delimiter">);</span>
  run_main<span class="Delimiter">(</span>argc<span class="Delimiter">,</span> argv<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_main<span class="Delimiter">)</span> <span class="Normal">delete</span> Trace_stream<span class="Delimiter">,</span> Trace_stream = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  teardown<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> run_main<span class="Delimiter">(</span><span class="Normal">int</span> argc<span class="Delimiter">,</span> <span class="Normal">char</span>* argv[]<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  recipe_ordinal r = get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>r<span class="Delimiter">)</span> run<span class="Delimiter">(</span>r<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Comment">//: By default we don't maintain the trace while running main because its</span>
<span class="Comment">//: overheads can grow rapidly. However, it's useful when debugging.</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span class="Normal">bool</span> Trace_main = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Commandline Options(*arg)&quot;)</span>
<span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>is_equal<span class="Delimiter">(</span>*arg<span class="Delimiter">,</span> <span class="Constant">&quot;--trace&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
  Trace_main = <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> dump_profile<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt;::iterator p = Instructions_running<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Instructions_running<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    cerr &lt;&lt; p<span class="Delimiter">-&gt;</span>first &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; p<span class="Delimiter">-&gt;</span>second &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  cerr &lt;&lt; <span class="Constant">&quot;== locations read</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt;::iterator p = Locations_read<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Locations_read<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    cerr &lt;&lt; p<span class="Delimiter">-&gt;</span>first &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; p<span class="Delimiter">-&gt;</span>second &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  cerr &lt;&lt; <span class="Constant">&quot;== locations read by instruction</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;string<span class="Delimiter">,</span> <span class="Normal">int</span>&gt;::iterator p = Locations_read_by_instruction<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Locations_read_by_instruction<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    cerr &lt;&lt; p<span class="Delimiter">-&gt;</span>first &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; p<span class="Delimiter">-&gt;</span>second &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
<span class="CommentedCode">//? atexit(dump_profile);</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> cleanup_main<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>Save_trace &amp;&amp; Trace_stream<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    ofstream fout<span class="Delimiter">(</span><span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">);</span>
    fout &lt;&lt; Trace_stream<span class="Delimiter">-&gt;</span>readable_contents<span class="Delimiter">(</span><span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
    fout<span class="Delimiter">.</span>close<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
atexit<span class="Delimiter">(</span>cleanup_main<span class="Delimiter">);</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> load_file_or_directory<span class="Delimiter">(</span>string filename<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_directory<span class="Delimiter">(</span>filename<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    load_all<span class="Delimiter">(</span>filename<span class="Delimiter">);</span>
    <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  ifstream fin<span class="Delimiter">(</span>filename<span class="Delimiter">.</span>c_str<span class="Delimiter">());</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!fin<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; <span class="Constant">&quot;no such file '&quot;</span> &lt;&lt; filename &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="Delimiter">;</span>
  <span class="Delimiter">}</span>
  trace<span class="Delimiter">(</span><span class="Constant">9990</span><span class="Delimiter">,</span> <span class="Constant">&quot;load&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;=== &quot;</span> &lt;&lt; filename &lt;&lt; end<span class="Delimiter">();</span>
  load<span class="Delimiter">(</span>fin<span class="Delimiter">);</span>
  fin<span class="Delimiter">.</span>close<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> is_directory<span class="Delimiter">(</span>string path<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">struct</span> stat info<span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>stat<span class="Delimiter">(</span>path<span class="Delimiter">.</span>c_str<span class="Delimiter">(),</span> &amp;info<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>  <span class="Comment">// error</span>
  <span class="Identifier">return</span> info<span class="Delimiter">.</span>st_mode &amp; S_IFDIR<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> load_all<span class="Delimiter">(</span>string dir<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  dirent** files<span class="Delimiter">;</span>
  <span class="Normal">int</span> num_files = scandir<span class="Delimiter">(</span>dir<span class="Delimiter">.</span>c_str<span class="Delimiter">(),</span> &amp;files<span class="Delimiter">,</span> <span class="Constant">NULL</span><span class="Delimiter">,</span> alphasort<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; num_files<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    string curr_file = files[i]<span class="Delimiter">-&gt;</span>d_name<span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>isdigit<span class="Delimiter">(</span>curr_file<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span>
      load_file_or_directory<span class="Delimiter">(</span>dir+<span class="Constant">'/'</span>+curr_file<span class="Delimiter">);</span>
    free<span class="Delimiter">(</span>files[i]<span class="Delimiter">);</span>
    files[i] = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  free<span class="Delimiter">(</span>files<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span class="PreProc">#include </span><span class="Constant">&lt;dirent.h&gt;</span>
<span class="PreProc">#include </span><span class="Constant">&lt;sys/stat.h&gt;</span>

<span class="SalientComment">//:: Reading from memory, writing to memory.</span>

<span class="Delimiter">:(code)</span>
vector&lt;<span class="Normal">double</span>&gt; read_memory<span class="Delimiter">(</span>reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// Begin Preprocess read_memory(x)</span>
  vector&lt;<span class="Normal">double</span>&gt; result<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="Delimiter">{</span>
    result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>x<span class="Delimiter">.</span>value<span class="Delimiter">);</span>
    <span class="Identifier">return</span> result<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// End Preprocess read_memory(x)</span>
  <span class="Normal">int</span> size = size_of<span class="Delimiter">(</span>x<span class="Delimiter">);</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> offset = <span class="Constant">0</span><span class="Delimiter">;</span> offset &lt; size<span class="Delimiter">;</span> ++offset<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">double</span> val = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> x<span class="Delimiter">.</span>value+offset<span class="Delimiter">);</span>
    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;mem&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;location &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>value+offset &lt;&lt; <span class="Constant">&quot; is &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span>val<span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
    result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>val<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> write_memory<span class="Delimiter">(</span>reagent<span class="Comment">/*</span><span class="Comment">copy</span><span class="Comment">*/</span> x<span class="Delimiter">,</span> <span class="Normal">const</span> vector&lt;<span class="Normal">double</span>&gt;&amp; data<span class="Delimiter">,</span> <span class="Normal">const</span> <span class="Normal">int</span> <span class="Comment">/*</span><span class="Comment">only when called in the run loop above to save results; -1 otherwise</span><span class="Comment">*/</span> product_index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// Begin Preprocess write_memory(x, data)</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!x<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    raise &lt;&lt; <span class="Constant">&quot;can't write to '&quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>x<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;'; no type</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="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_dummy<span class="Delimiter">(</span>x<span class="Delimiter">))</span> <span class="Identifier">return</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="Delimiter">;</span>
  <span class="Comment">// End Preprocess write_memory(x, data)</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>x<span class="Delimiter">.</span>value == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>size_mismatch<span class="Delimiter">(</span>x<span class="Delimiter">,</span> data<span class="Delimiter">))</span> <span class="Delimiter">{</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">())</span> &lt;&lt; <span class="Constant">&quot;size mismatch in storing to '&quot;</span> &lt;&lt; x<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' (&quot;</span> &lt;&lt; size_of<span class="Delimiter">(</span>x<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot; vs &quot;</span> &lt;&lt; SIZE<span class="Delimiter">(</span>data<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;) at '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>current_instruction<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="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// End write_memory(x) Special-cases</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> offset = <span class="Constant">0</span><span class="Delimiter">;</span> offset &lt; SIZE<span class="Delimiter">(</span>data<span class="Delimiter">);</span> ++offset<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    assert<span class="Delimiter">(</span>x<span class="Delimiter">.</span>value+offset &gt; <span class="Constant">0</span><span class="Delimiter">);</span>
    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;mem&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;storing &quot;</span> &lt;&lt; no_scientific<span class="Delimiter">(</span>data<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot; in location &quot;</span> &lt;&lt; x<span class="Delimiter">.</span>value+offset &lt;&lt; end<span class="Delimiter">();</span>
    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> x<span class="Delimiter">.</span>value+offset<span class="Delimiter">,</span> data<span class="Delimiter">.</span>at<span class="Delimiter">(</span>offset<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">int</span> size_of<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!r<span class="Delimiter">.</span>type<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Comment">// End size_of(reagent r) Cases</span>
  <span class="Identifier">return</span> size_of<span class="Delimiter">(</span>r<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">int</span> size_of<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* type<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!type<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Comment">// End size_of(type) Cases</span>
  <span class="Identifier">return</span> <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> size_mismatch<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; x<span class="Delimiter">,</span> <span class="Normal">const</span> vector&lt;<span class="Normal">double</span>&gt;&amp; data<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="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Comment">// End size_mismatch(x) Cases</span>
<span class="CommentedCode">//?   if (size_of(x) != SIZE(data)) cerr &lt;&lt; size_of(x) &lt;&lt; &quot; vs &quot; &lt;&lt; SIZE(data) &lt;&lt; '\n';</span>
  <span class="Identifier">return</span> size_of<span class="Delimiter">(</span>x<span class="Delimiter">)</span> != SIZE<span class="Delimiter">(</span>data<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">inline</span> <span class="Normal">bool</span> is_literal<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!r<span class="Delimiter">.</span>type<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>r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span><span class="Delimiter">)</span>
    assert<span class="Delimiter">(</span>!r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>left &amp;&amp; !r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>right<span class="Delimiter">);</span>
  <span class="Identifier">return</span> r<span class="Delimiter">.</span>type<span class="Delimiter">-&gt;</span>value == <span class="Constant">0</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">inline</span> <span class="Normal">bool</span> scalar<span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;<span class="Normal">int</span>&gt;&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> SIZE<span class="Delimiter">(</span>x<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Normal">inline</span> <span class="Normal">bool</span> scalar<span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;<span class="Normal">double</span>&gt;&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> SIZE<span class="Delimiter">(</span>x<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">// helper for tests</span>
<span class="Normal">void</span> run<span class="Delimiter">(</span>string form<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  vector&lt;recipe_ordinal&gt; tmp = load<span class="Delimiter">(</span>form<span class="Delimiter">);</span>
  transform_all<span class="Delimiter">();</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>tmp<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>trace_count<span class="Delimiter">(</span><span class="Constant">&quot;error&quot;</span><span class="Delimiter">)</span> &gt; <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
  <span class="Comment">// if a test defines main, it probably wants to start there regardless of</span>
  <span class="Comment">// definition order</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">)))</span>
    run<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">));</span>
  <span class="Normal">else</span>
    run<span class="Delimiter">(</span>tmp<span class="Delimiter">.</span>front<span class="Delimiter">());</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario run_label)</span>
def main [
  +foo
  <span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">23</span>
  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>:number
]
<span class="traceContains">+run: {1: &quot;number&quot;} &lt;- copy {23: &quot;literal&quot;}</span>
<span class="traceContains">+run: {2: &quot;number&quot;} &lt;- copy {1: &quot;number&quot;}</span>
<span class="traceAbsent">-run: +foo</span>

<span class="Delimiter">:(scenario run_dummy)</span>
def main [
  _<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
]
<span class="traceContains">+run: _ &lt;- copy {0: &quot;literal&quot;}</span>

<span class="Delimiter">:(scenario write_to_0_disallowed)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  <span class="Constant">0</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
]
<span class="traceAbsent">-mem: storing 34 in location 0</span>

<span class="Comment">//: mu is robust to various combinations of commas and spaces. You just have</span>
<span class="Comment">//: to put spaces around the '&lt;-'.</span>

<span class="Delimiter">:(scenario comma_without_space)</span>
def main [
  <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">2</span><span class="Delimiter">,</span><span class="Constant">2</span>
]
<span class="traceContains">+mem: storing 2 in location 1</span>

<span class="Delimiter">:(scenario space_without_comma)</span>
def main [
  <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">2</span> <span class="Constant">2</span>
]
<span class="traceContains">+mem: storing 2 in location 1</span>

<span class="Delimiter">:(scenario comma_before_space)</span>
def main [
  <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">2</span>
]
<span class="traceContains">+mem: storing 2 in location 1</span>

<span class="Delimiter">:(scenario comma_after_space)</span>
def main [
  <span class="Constant">1</span>:number<span class="Delimiter">,</span> <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">2</span> <span class="Delimiter">,</span><span class="Constant">2</span>
]
<span class="traceContains">+mem: storing 2 in location 1</span>
</pre>
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