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<title>Mu - 091run_interactive.cc</title>
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<pre>
<span class="Comment">//: Helper for various programming environments: run arbitrary mu code and</span>
<span class="Comment">//: return some result in string form.</span>

<span class="Delimiter">:(scenario run_interactive_code)</span>
def main [
  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>copy <span class="Constant">0</span>
  <span class="Constant">2</span>:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [<span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>copy <span class="Constant">34</span>]
  run-interactive <span class="Constant">2</span>:address:shared:array:character
  <span class="Constant">3</span>:number/<span class="Special">raw &lt;- </span>copy <span class="Constant">1</span>:number/<span class="Special">raw</span>
]
<span class="traceContains">+mem: storing 34 in location 3</span>

<span class="Delimiter">:(scenario run_interactive_empty)</span>
def main [
  <span class="Constant">1</span>:address:shared:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/unsafe
  <span class="Constant">2</span>:address:shared:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:shared:array:character
]
<span class="Comment"># result is null</span>
<span class="traceContains">+mem: storing 0 in location 2</span>

<span class="Comment">//: run code in 'interactive mode', i.e. with errors off and return:</span>
<span class="Comment">//:   stringified output in case we want to print it to screen</span>
<span class="Comment">//:   any errors encountered</span>
<span class="Comment">//:   simulated screen any prints went to</span>
<span class="Comment">//:   any 'app' layer traces generated</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
RUN_INTERACTIVE<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;run-interactive&quot;</span><span class="Delimiter">,</span> RUN_INTERACTIVE<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> RUN_INTERACTIVE: <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">1</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;'run-interactive' requires exactly one ingredient, but got &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_string<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> <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;first ingredient of 'run-interactive' should be a string, but got &quot;</span> &lt;&lt; to_string<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> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> RUN_INTERACTIVE: <span class="Delimiter">{</span>
  <span class="Normal">bool</span> new_code_pushed_to_stack = run_interactive<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!new_code_pushed_to_stack<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">5</span><span class="Delimiter">);</span>
    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>trace_error_contents<span class="Delimiter">());</span>
    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">);</span>
    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">3</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>trace_app_contents<span class="Delimiter">());</span>
    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">4</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>  <span class="Comment">// completed</span>
    run_code_end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>  <span class="Comment">// done with this instruction</span>
  <span class="Delimiter">}</span>
  <span class="Normal">else</span> <span class="Delimiter">{</span>
    <span class="Identifier">continue</span><span class="Delimiter">;</span>  <span class="Comment">// not done with caller; don't increment current_step_index()</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span class="Normal">bool</span> Track_most_recent_products = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Tracing&quot;)</span>
trace_stream* Save_trace_stream = <span class="Constant">NULL</span><span class="Delimiter">;</span>
string Save_trace_file<span class="Delimiter">;</span>
vector&lt;recipe_ordinal&gt; Save_recently_added_recipes<span class="Delimiter">;</span>
vector&lt;recipe_ordinal&gt; Save_recently_added_shape_shifting_recipes<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Track_most_recent_products = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(code)</span>
<span class="Comment">// reads a string, tries to call it as code (treating it as a test), saving</span>
<span class="Comment">// all errors.</span>
<span class="Comment">// returns true if successfully called (no errors found during load and transform)</span>
<span class="Normal">bool</span> run_interactive<span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span> &amp;&amp; get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span> != <span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Comment">// try to sandbox the run as best you can</span>
  <span class="Comment">// todo: test this</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!Current_scenario<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">1</span><span class="Delimiter">;</span> i &lt; Reserved_for_tests<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span>
      Memory<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
  <span class="Delimiter">}</span>
  string command = trim<span class="Delimiter">(</span>strip_comments<span class="Delimiter">(</span>read_mu_string<span class="Delimiter">(</span>address<span class="Delimiter">)));</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>command<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  Name[get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span>]<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  run_code_begin<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">snapshot_recently_added_recipes</span><span class="Comment">*/</span><span class="Constant">true</span><span class="Delimiter">);</span>
  <span class="Comment">// don't kill the current routine on parse errors</span>
  routine* save_current_routine = Current_routine<span class="Delimiter">;</span>
  Current_routine = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  <span class="Comment">// call run(string) but without the scheduling</span>
  load<span class="Delimiter">(</span>string<span class="Delimiter">(</span><span class="Constant">&quot;recipe! interactive [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">)</span> +
          <span class="Constant">&quot;local-scope</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
          <span class="Constant">&quot;screen:address:shared:screen &lt;- next-ingredient</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
          <span class="Constant">&quot;$start-tracking-products</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
          command + <span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
          <span class="Constant">&quot;$stop-tracking-products</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
          <span class="Constant">&quot;return screen</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
       <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  transform_all<span class="Delimiter">();</span>
  Current_routine = save_current_routine<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="Constant">false</span><span class="Delimiter">;</span>
  <span class="Comment">// now call 'sandbox' which will run 'interactive' in a separate routine,</span>
  <span class="Comment">// and wait for it</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>Save_trace_stream<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    ++Save_trace_stream<span class="Delimiter">-&gt;</span>callstack_depth<span class="Delimiter">;</span>
    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;trace&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;run-interactive: incrementing callstack depth to &quot;</span> &lt;&lt; Save_trace_stream<span class="Delimiter">-&gt;</span>callstack_depth &lt;&lt; end<span class="Delimiter">();</span>
    assert<span class="Delimiter">(</span>Save_trace_stream<span class="Delimiter">-&gt;</span>callstack_depth &lt; <span class="Constant">9000</span><span class="Delimiter">);</span>  <span class="Comment">// 9998-101 plus cushion</span>
  <span class="Delimiter">}</span>
  Current_routine<span class="Delimiter">-&gt;</span>calls<span class="Delimiter">.</span>push_front<span class="Delimiter">(</span>call<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;sandbox&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="Normal">void</span> run_code_begin<span class="Delimiter">(</span><span class="Normal">bool</span> snapshot_recently_added_recipes<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// stuff to undo later, in run_code_end()</span>
  Hide_errors = <span class="Constant">true</span><span class="Delimiter">;</span>
  Disable_redefine_checks = <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>snapshot_recently_added_recipes<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Save_recently_added_recipes = Recently_added_recipes<span class="Delimiter">;</span>
    Recently_added_recipes<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
    Save_recently_added_shape_shifting_recipes = Recently_added_shape_shifting_recipes<span class="Delimiter">;</span>
    Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
  Save_trace_stream = Trace_stream<span class="Delimiter">;</span>
  Save_trace_file = Trace_file<span class="Delimiter">;</span>
  Trace_file = <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
  Trace_stream = <span class="Normal">new</span> trace_stream<span class="Delimiter">;</span>
  Trace_stream<span class="Delimiter">-&gt;</span>collect_depth = App_depth<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> run_code_end<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  Hide_errors = <span class="Constant">false</span><span class="Delimiter">;</span>
  Disable_redefine_checks = <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">delete</span> Trace_stream<span class="Delimiter">;</span>
  Trace_stream = Save_trace_stream<span class="Delimiter">;</span>
  Save_trace_stream = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  Trace_file = Save_trace_file<span class="Delimiter">;</span>
  Save_trace_file<span class="Delimiter">.</span>clear<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;interactive&quot;</span><span class="Delimiter">));</span>  <span class="Comment">// keep past sandboxes from inserting errors</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!Save_recently_added_recipes<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
    clear_recently_added_recipes<span class="Delimiter">();</span>
    Recently_added_recipes = Save_recently_added_recipes<span class="Delimiter">;</span>
    Save_recently_added_recipes<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
    Recently_added_shape_shifting_recipes = Save_recently_added_shape_shifting_recipes<span class="Delimiter">;</span>
    Save_recently_added_shape_shifting_recipes<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Load Recipes&quot;)</span>
load<span class="Delimiter">(</span>string<span class="Delimiter">(</span>
<span class="Constant">&quot;recipe interactive [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">)</span> +  <span class="Comment">// just a dummy version to initialize the Recipe_ordinal and so on</span>
<span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
<span class="Constant">&quot;recipe sandbox [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;local-scope</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;screen:address:shared:screen &lt;- new-fake-screen 30, 5</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;r:number/routine_id &lt;- start-running interactive, screen</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;limit-time r, 100000/instructions</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;wait-for-routine r</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;sandbox-state:number &lt;- routine-state r/routine_id</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;completed?:boolean &lt;- equal sandbox-state, 1/completed</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;output:address:shared:array:character &lt;- $most-recent-products</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;errors:address:shared:array:character &lt;- save-errors</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;stashes:address:shared:array:character &lt;- save-app-trace</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;$cleanup-run-interactive</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
  <span class="Constant">&quot;return output, errors, screen, stashes, completed?</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> +
<span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
transform_all<span class="Delimiter">();</span>
Recently_added_recipes<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>

<span class="Comment">//: adjust errors in the sandbox</span>
<span class="Delimiter">:(after &quot;string maybe(string s)&quot;)</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>s == <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>

<span class="Delimiter">:(scenario run_interactive_comments)</span>
def main [
  <span class="Constant">1</span>:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [<span class="Comment"># ab</span>
add <span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">2</span>]
  <span class="Constant">2</span>:address:shared:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:shared:array:character
  <span class="Constant">3</span>:array:character<span class="Special"> &lt;- </span>copy *<span class="Constant">2</span>:address:shared:array:character
]
<span class="traceContains">+mem: storing 52 in location 4</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
_START_TRACKING_PRODUCTS<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;$start-tracking-products&quot;</span><span class="Delimiter">,</span> _START_TRACKING_PRODUCTS<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> _START_TRACKING_PRODUCTS: <span class="Delimiter">{</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> _START_TRACKING_PRODUCTS: <span class="Delimiter">{</span>
  Track_most_recent_products = <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
_STOP_TRACKING_PRODUCTS<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;$stop-tracking-products&quot;</span><span class="Delimiter">,</span> _STOP_TRACKING_PRODUCTS<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> _STOP_TRACKING_PRODUCTS: <span class="Delimiter">{</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> _STOP_TRACKING_PRODUCTS: <span class="Delimiter">{</span>
  Track_most_recent_products = <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
_MOST_RECENT_PRODUCTS<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;$most-recent-products&quot;</span><span class="Delimiter">,</span> _MOST_RECENT_PRODUCTS<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> _MOST_RECENT_PRODUCTS: <span class="Delimiter">{</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> _MOST_RECENT_PRODUCTS: <span class="Delimiter">{</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>new_mu_string<span class="Delimiter">(</span>Most_recent_products<span class="Delimiter">));</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
SAVE_ERRORS<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;save-errors&quot;</span><span class="Delimiter">,</span> SAVE_ERRORS<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> SAVE_ERRORS: <span class="Delimiter">{</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> SAVE_ERRORS: <span class="Delimiter">{</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>trace_error_contents<span class="Delimiter">());</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
SAVE_APP_TRACE<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;save-app-trace&quot;</span><span class="Delimiter">,</span> SAVE_APP_TRACE<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> SAVE_APP_TRACE: <span class="Delimiter">{</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> SAVE_APP_TRACE: <span class="Delimiter">{</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>trace_app_contents<span class="Delimiter">());</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
_CLEANUP_RUN_INTERACTIVE<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;$cleanup-run-interactive&quot;</span><span class="Delimiter">,</span> _CLEANUP_RUN_INTERACTIVE<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> _CLEANUP_RUN_INTERACTIVE: <span class="Delimiter">{</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> _CLEANUP_RUN_INTERACTIVE: <span class="Delimiter">{</span>
  run_code_end<span class="Delimiter">();</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario &quot;run_interactive_converts_result_to_text&quot;)</span>
def main [
  <span class="Comment"># try to interactively add 2 and 2</span>
  <span class="Constant">1</span>:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [add <span class="Constant">2</span><span class="Delimiter">,</span> <span class="Constant">2</span>]
  <span class="Constant">2</span>:address:shared:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:shared:array:character
  <span class="Constant">10</span>:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">2</span>:address:shared:array:character/lookup
]
<span class="Comment"># first letter in the output should be '4' in unicode</span>
<span class="traceContains">+mem: storing 52 in location 11</span>

<span class="Delimiter">:(scenario &quot;run_interactive_returns_text&quot;)</span>
def main [
  <span class="Comment"># try to interactively add 2 and 2</span>
  <span class="Constant">1</span>:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [
    x:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [a]
    y:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [b]
    z:address:shared:array:character<span class="Special"> &lt;- </span>append x:address:shared:array:character<span class="Delimiter">,</span> y:address:shared:array:character
  ]
  <span class="Constant">2</span>:address:shared:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:shared:array:character
  <span class="Constant">10</span>:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">2</span>:address:shared:array:character/lookup
]
<span class="Comment"># output contains &quot;ab&quot;</span>
<span class="traceContains">+mem: storing 97 in location 11</span>
<span class="traceContains">+mem: storing 98 in location 12</span>

<span class="Delimiter">:(scenario &quot;run_interactive_returns_errors&quot;)</span>
def main [
  <span class="Comment"># run a command that generates an error</span>
  <span class="Constant">1</span>:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [x:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
get x:number<span class="Delimiter">,</span> foo:offset]
  <span class="Constant">2</span>:address:shared:array:character<span class="Delimiter">,</span> <span class="Constant">3</span>:address:shared:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:shared:array:character
  <span class="Constant">10</span>:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">3</span>:address:shared:array:character/lookup
]
<span class="Comment"># error should be &quot;unknown element foo in container number&quot;</span>
<span class="traceContains">+mem: storing 117 in location 11</span>
<span class="traceContains">+mem: storing 110 in location 12</span>
<span class="traceContains">+mem: storing 107 in location 13</span>
<span class="traceContains">+mem: storing 110 in location 14</span>
<span class="Comment"># ...</span>

<span class="Delimiter">:(scenario run_interactive_with_comment)</span>
def main [
  <span class="Comment"># 2 instructions, with a comment after the first</span>
  <span class="Constant">1</span>:address:shared:array:number<span class="Special"> &lt;- </span><span class="Normal">new</span> [a:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>  <span class="Comment"># abc</span>
b:number<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
]
  <span class="Constant">2</span>:address:shared:array:character<span class="Delimiter">,</span> <span class="Constant">3</span>:address:shared:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:shared:array:character
]
<span class="Comment"># no errors</span>
<span class="traceContains">+mem: storing 0 in location 3</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> test_run_interactive_cleans_up_any_created_specializations<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// define a generic recipe</span>
  assert<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;foo&quot;</span><span class="Delimiter">));</span>
  load<span class="Delimiter">(</span><span class="Constant">&quot;recipe foo x:_elem -&gt; n:number [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
       <span class="Constant">&quot;  return 34</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
       <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  assert<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Recently_added_recipes<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">);</span>  <span class="Comment">// foo</span>
  assert<span class="Delimiter">(</span>variant_count<span class="Delimiter">(</span><span class="Constant">&quot;foo&quot;</span><span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">);</span>
  <span class="Comment">// run-interactive a call that specializes this recipe</span>
  run<span class="Delimiter">(</span><span class="Constant">&quot;recipe main [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
       <span class="Constant">&quot;  1:number/raw &lt;- copy 0</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
       <span class="Constant">&quot;  2:address:shared:array:character &lt;- new [foo 1:number/raw]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
       <span class="Constant">&quot;  run-interactive 2:address:shared:array:character</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
       <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  assert<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Recently_added_recipes<span class="Delimiter">)</span> == <span class="Constant">2</span><span class="Delimiter">);</span>  <span class="Comment">// foo, main</span>
  <span class="Comment">// check that number of variants doesn't change</span>
  CHECK_EQ<span class="Delimiter">(</span>variant_count<span class="Delimiter">(</span><span class="Constant">&quot;foo&quot;</span><span class="Delimiter">),</span> <span class="Constant">1</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> variant_count<span class="Delimiter">(</span>string recipe_name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> recipe_name<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Identifier">return</span> non_ghost_size<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> recipe_name<span class="Delimiter">));</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
string Most_recent_products<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Most_recent_products = <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End of Instruction&quot;)</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>Track_most_recent_products<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  track_most_recent_products<span class="Delimiter">(</span>current_instruction<span class="Delimiter">(),</span> products<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> track_most_recent_products<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; instruction<span class="Delimiter">,</span> <span class="Normal">const</span> vector&lt;vector&lt;<span class="Normal">double</span>&gt; &gt;&amp; products<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  ostringstream out<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// string</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>i &lt; SIZE<span class="Delimiter">(</span>instruction<span class="Delimiter">.</span>products<span class="Delimiter">))</span> <span class="Delimiter">{</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_string<span class="Delimiter">(</span>instruction<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
        <span class="Normal">if</span> <span class="Delimiter">(</span>!scalar<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
          tb_shutdown<span class="Delimiter">();</span>
          cerr &lt;&lt; read_mu_string<span class="Delimiter">(</span>trace_error_contents<span class="Delimiter">())</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
          cerr &lt;&lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">&quot;: &quot;</span><span class="Delimiter">;</span>
          <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j &lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span> ++j<span class="Delimiter">)</span>
            cerr &lt;&lt; no_scientific<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>at<span class="Delimiter">(</span>j<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">' '</span><span class="Delimiter">;</span>
          cerr &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
        <span class="Delimiter">}</span>
        assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)));</span>
        out &lt;&lt; read_mu_string<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><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>
      <span class="Comment">// End Record Product Special-cases</span>
    <span class="Delimiter">}</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> j = <span class="Constant">0</span><span class="Delimiter">;</span> j &lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span> ++j<span class="Delimiter">)</span>
      out &lt;&lt; no_scientific<span class="Delimiter">(</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>at<span class="Delimiter">(</span>j<span class="Delimiter">))</span> &lt;&lt; <span class="Constant">' '</span><span class="Delimiter">;</span>
    out &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  Most_recent_products = out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
string strip_comments<span class="Delimiter">(</span>string in<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  ostringstream result<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>in<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>in<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> != <span class="Constant">'#'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      result &lt;&lt; in<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
    <span class="Delimiter">}</span>
    <span class="Normal">else</span> <span class="Delimiter">{</span>
      <span class="Normal">while</span> <span class="Delimiter">(</span>i+<span class="Constant">1</span> &lt; SIZE<span class="Delimiter">(</span>in<span class="Delimiter">)</span> &amp;&amp; in<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i+<span class="Constant">1</span><span class="Delimiter">)</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span>
        ++i<span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> result<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> stringified_value_of_location<span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// convert to string</span>
  ostringstream out<span class="Delimiter">;</span>
  out &lt;&lt; no_scientific<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address<span class="Delimiter">));</span>
  <span class="Identifier">return</span> new_mu_string<span class="Delimiter">(</span>out<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
<span class="Delimiter">}</span>

<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> trace_error_contents<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  ostringstream out<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>label != <span class="Constant">&quot;error&quot;</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    out &lt;&lt; p<span class="Delimiter">-&gt;</span>contents<span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>*--p<span class="Delimiter">-&gt;</span>contents<span class="Delimiter">.</span>end<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> out &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  string result = out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  truncate<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
  <span class="Identifier">return</span> new_mu_string<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> trace_app_contents<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  ostringstream out<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>depth != App_depth<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    out &lt;&lt; p<span class="Delimiter">-&gt;</span>contents<span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>*--p<span class="Delimiter">-&gt;</span>contents<span class="Delimiter">.</span>end<span class="Delimiter">()</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> out &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  string result = out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  truncate<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
  <span class="Identifier">return</span> new_mu_string<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Normal">void</span> truncate<span class="Delimiter">(</span>string&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>x<span class="Delimiter">)</span> &gt; <span class="Constant">512</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    x<span class="Delimiter">.</span>erase<span class="Delimiter">(</span><span class="Constant">512</span><span class="Delimiter">);</span>
    *x<span class="Delimiter">.</span>rbegin<span class="Delimiter">()</span> = <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
    *++x<span class="Delimiter">.</span>rbegin<span class="Delimiter">()</span> = <span class="Constant">'.'</span><span class="Delimiter">;</span>
    *++++x<span class="Delimiter">.</span>rbegin<span class="Delimiter">()</span> = <span class="Constant">'.'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Comment">//: simpler version of run-interactive: doesn't do any running, just loads</span>
<span class="Comment">//: recipes and reports errors.</span>

<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
RELOAD<span class="Delimiter">,</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;reload&quot;</span><span class="Delimiter">,</span> RELOAD<span class="Delimiter">);</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span class="Normal">case</span> RELOAD: <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">1</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;'reload' requires exactly one ingredient, but got &quot;</span> &lt;&lt; to_string<span class="Delimiter">(</span>inst<span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!is_mu_string<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> <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;first ingredient of 'reload' should be a string, but got &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>original_string &lt;&lt; <span class="cSpecial">'\n'</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Identifier">break</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span class="Normal">case</span> RELOAD: <span class="Delimiter">{</span>
  <span class="Comment">// clear any containers in advance</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>Recently_added_types<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> Recently_added_types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    Type_ordinal<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Type<span class="Delimiter">,</span> Recently_added_types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)).</span>name<span class="Delimiter">);</span>
    Type<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>Recently_added_types<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>map&lt;string<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt; &gt;::iterator p = Recipe_variants<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != Recipe_variants<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    vector&lt;recipe_ordinal&gt;&amp; variants = p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">;</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>second<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>find<span class="Delimiter">(</span>Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>begin<span class="Delimiter">(),</span> Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>end<span class="Delimiter">(),</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> != Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
        variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> = -<span class="Constant">1</span><span class="Delimiter">;</span>  <span class="Comment">// ghost</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>Recently_added_shape_shifting_recipes<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Recipe_ordinal<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)).</span>name<span class="Delimiter">);</span>
    Recipe<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  Recently_added_shape_shifting_recipes<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
  string code = read_mu_string<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">));</span>
  run_code_begin<span class="Delimiter">(</span><span class="Comment">/*</span><span class="Comment">snapshot_recently_added_recipes</span><span class="Comment">*/</span><span class="Constant">false</span><span class="Delimiter">);</span>
  routine* save_current_routine = Current_routine<span class="Delimiter">;</span>
  Current_routine = <span class="Constant">NULL</span><span class="Delimiter">;</span>
  vector&lt;recipe_ordinal&gt; recipes_reloaded = load<span class="Delimiter">(</span>code<span class="Delimiter">);</span>
  <span class="Comment">// clear a few things from previous runs</span>
  <span class="Comment">// ad hoc list; we've probably missed a few</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">long</span> <span class="Normal">long</span> <span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>recipes_reloaded<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
    Name<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>recipes_reloaded<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  transform_all<span class="Delimiter">();</span>
  Trace_stream<span class="Delimiter">-&gt;</span>newline<span class="Delimiter">();</span>  <span class="Comment">// flush trace</span>
  Current_routine = save_current_routine<span class="Delimiter">;</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
  products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>trace_error_contents<span class="Delimiter">());</span>
  run_code_end<span class="Delimiter">();</span>  <span class="Comment">// wait until we're done with the trace contents</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario reload_continues_past_error)</span>
def main [
  local-scope
  x:address:shared:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [recipe foo [
  get <span class="Constant">1234</span>:number<span class="Delimiter">,</span> foo:offset
]]
  reload x
  <span class="Constant">1</span>:number/<span class="Special">raw &lt;- </span>copy <span class="Constant">34</span>
]
<span class="traceContains">+mem: storing 34 in location 1</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> test_reload_cleans_up_any_created_specializations<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  <span class="Comment">// define a generic recipe and a call to it</span>
  assert<span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;foo&quot;</span><span class="Delimiter">));</span>
  assert<span class="Delimiter">(</span>variant_count<span class="Delimiter">(</span><span class="Constant">&quot;foo&quot;</span><span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">);</span>
  <span class="Comment">// a call that specializes this recipe</span>
  run<span class="Delimiter">(</span><span class="Constant">&quot;recipe main [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  local-scope</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  x:address:shared:array:character &lt;- new [recipe foo x:_elem -&gt; n:number [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;local-scope</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;load-ingredients</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;return 34</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;recipe main2 [</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;local-scope</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;load-ingredients</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;x:number &lt;- copy 34</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;foo x:number</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;]]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;  reload x</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span>
      <span class="Constant">&quot;]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  <span class="Comment">// check that number of variants includes specialization</span>
  assert<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>Recently_added_recipes<span class="Delimiter">)</span> == <span class="Constant">4</span><span class="Delimiter">);</span>  <span class="Comment">// foo, main, main2, foo specialization</span>
  CHECK_EQ<span class="Delimiter">(</span>variant_count<span class="Delimiter">(</span><span class="Constant">&quot;foo&quot;</span><span class="Delimiter">),</span> <span class="Constant">2</span><span class="Delimiter">);</span>
<span class="Delimiter">}</span>
</pre>
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