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<pre id='vimCodeElement'>
<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>
recipe main [
  <span class="Constant">2</span>:address:array:character<span class="Special"> &lt;- </span>new [<span class="Constant">1</span>:number<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>:literal]
  run-interactive <span class="Constant">2</span>:address:array:character
]
<span class="traceContains">+mem: storing 34 in location 1</span>

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

<span class="Comment">//: run code in 'interactive mode', i.e. with warnings off, and recording</span>
<span class="Comment">//: output in case we want to print it to screen</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>
Recipe_ordinal[<span class="Constant">&quot;run-interactive&quot;</span>] = RUN_INTERACTIVE<span class="Delimiter">;</span>
<span class="CommentedCode">//? cerr &lt;&lt; &quot;run-interactive: &quot; &lt;&lt; RUN_INTERACTIVE &lt;&lt; '\n'; //? 1</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case RUN_INTERACTIVE: <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
  products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
  bool 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>
  if <span class="Delimiter">(</span>!new_code_pushed_to_stack<span class="Delimiter">)</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>warnings_from_trace<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>
  else <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>
bool Running_interactive = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Running_interactive = <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, saving all warnings.</span>
<span class="Comment">// returns true if successfully called (no errors found during load and transform)</span>
bool run_interactive<span class="Delimiter">(</span>long long int address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">.</span>find<span class="Delimiter">(</span><span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span> == Recipe_ordinal<span class="Delimiter">.</span>end<span class="Delimiter">())</span>
    Recipe_ordinal[<span class="Constant">&quot;interactive&quot;</span>] = Next_recipe_ordinal++<span class="Delimiter">;</span>
  string command = trim<span class="Delimiter">(</span>strip_comments<span class="Delimiter">(</span>to_string<span class="Delimiter">(</span>address<span class="Delimiter">)));</span>
  if <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>
<span class="CommentedCode">//?   tb_shutdown(); //? 1</span>
<span class="CommentedCode">//?   cerr &lt;&lt; command &lt;&lt; '\n'; //? 2</span>
  Recipe<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>Recipe_ordinal[<span class="Constant">&quot;interactive&quot;</span>]<span class="Delimiter">);</span>
  Hide_warnings = <span class="Constant">true</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Trace_file = <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>  <span class="Comment">// if there wasn't already a stream we don't want to save it</span>
    Trace_stream = new trace_stream<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Comment">// call run(string) but without the scheduling</span>
  load<span class="Delimiter">(</span><span class="Constant">&quot;recipe interactive [</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">]</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
  transform_all<span class="Delimiter">();</span>
  if <span class="Delimiter">(</span>trace_count<span class="Delimiter">(</span><span class="Constant">&quot;warn&quot;</span><span class="Delimiter">)</span> &gt; <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    Hide_warnings = <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  Running_interactive = <span class="Constant">true</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>Recipe_ordinal[<span class="Constant">&quot;interactive&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="Delimiter">:(after &quot;Starting Reply&quot;)</span>
if <span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">()</span> == <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span> clean_up_interactive<span class="Delimiter">();</span>
<span class="Delimiter">:(after &quot;Falling Through End Of Recipe&quot;)</span>
if <span class="Delimiter">(</span>current_recipe_name<span class="Delimiter">()</span> == <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span> clean_up_interactive<span class="Delimiter">();</span>
<span class="Delimiter">:(code)</span>
void clean_up_interactive<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span class="CommentedCode">//?   static int foo = 0; //? 1</span>
  Hide_warnings = <span class="Constant">false</span><span class="Delimiter">;</span>
  Running_interactive = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="CommentedCode">//?   ++foo; //? 1</span>
<span class="CommentedCode">//?   if (foo == 1) tb_init(); //? 1</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario &quot;run_interactive_returns_stringified_result&quot;)</span>
recipe main [
  <span class="Comment"># try to interactively add 2 and 2</span>
  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new [add <span class="Constant">2</span>:literal<span class="Delimiter">,</span> <span class="Constant">2</span>:literal]
  <span class="Constant">2</span>:address:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:array:character
  <span class="Constant">10</span>:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">2</span>:address:array:character/deref
]
<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_string&quot;)</span>
recipe main [
  <span class="Comment"># try to interactively add 2 and 2</span>
  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new [
    <span class="Constant">100</span>:address:array:character<span class="Special"> &lt;- </span>new [a]
    <span class="Constant">101</span>:address:array:character<span class="Special"> &lt;- </span>new [b]
    <span class="Constant">102</span>:address:array:character<span class="Special"> &lt;- </span>string-append <span class="Constant">100</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">101</span>:address:array:character
  ]
  <span class="Constant">2</span>:address:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:array:character
  <span class="Constant">10</span>:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">2</span>:address:array:character/deref
]
<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_warnings&quot;)</span>
recipe main [
  <span class="Comment"># run a command that generates a warning</span>
  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new [get <span class="Constant">1234</span>:number<span class="Delimiter">,</span> foo:offset]
  <span class="Constant">2</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">3</span>:address:array:character<span class="Special"> &lt;- </span>run-interactive <span class="Constant">1</span>:address:array:character
  <span class="Constant">10</span>:array:character<span class="Special"> &lt;- </span>copy <span class="Constant">3</span>:address:array:character/deref
]
<span class="Comment"># warning 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="Delimiter">:(before &quot;End Globals&quot;)</span>
string Most_recent_results<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Most_recent_results = <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End of Instruction&quot;)</span>
if <span class="Delimiter">(</span>Running_interactive<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  record_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>
void record_products<span class="Delimiter">(</span>const instruction&amp; instruction<span class="Delimiter">,</span> const vector&lt;vector&lt;double&gt; &gt;&amp; products<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  ostringstream out<span class="Delimiter">;</span>
<span class="CommentedCode">//?   cerr &lt;&lt; current_instruction().to_string() &lt;&lt; '\n'; //? 1</span>
  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// string</span>
    if <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="CommentedCode">//?       cerr &lt;&lt; &quot;AA\n&quot;; //? 1</span>
<span class="CommentedCode">//?       cerr &lt;&lt; instruction.products.size() &lt;&lt; &quot; vs &quot; &lt;&lt; i &lt;&lt; '\n'; //? 1</span>
      if <span class="Delimiter">(</span>is_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="CommentedCode">//?         cerr &lt;&lt; &quot;BB\n&quot;; //? 1</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; to_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>
    for <span class="Delimiter">(</span>long long int 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> <span class="Delimiter">{</span>
<span class="CommentedCode">//?       cerr &lt;&lt; &quot;aa: &quot; &lt;&lt; i &lt;&lt; &quot;, &quot; &lt;&lt; j &lt;&lt; &quot;: &quot; &lt;&lt; products.at(i).at(j) &lt;&lt; '\n'; //? 1</span>
        out &lt;&lt; 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>
    <span class="Delimiter">}</span>
    out &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
<span class="CommentedCode">//?   cerr &lt;&lt; &quot;aa: {\n&quot; &lt;&lt; out.str() &lt;&lt; &quot;}\n&quot;; //? 2</span>
  Most_recent_results = out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>
<span class="Delimiter">:(before &quot;Complete Call Fallthrough&quot;)</span>
if <span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>operation == RUN_INTERACTIVE &amp;&amp; !current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">)</span> &lt;= <span class="Constant">2</span><span class="Delimiter">);</span>
  <span class="Comment">// Send the results of the most recently executed instruction, regardless of</span>
  <span class="Comment">// call depth, to be converted to string and potentially printed to string.</span>
  vector&lt;double&gt; result<span class="Delimiter">;</span>
  result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>new_string<span class="Delimiter">(</span>Most_recent_results<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><span class="Constant">0</span><span class="Delimiter">),</span> result<span class="Delimiter">);</span>
  if <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>products<span class="Delimiter">)</span> == <span class="Constant">2</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
    vector&lt;double&gt; warnings<span class="Delimiter">;</span>
    warnings<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>warnings_from_trace<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><span class="Constant">1</span><span class="Delimiter">),</span> warnings<span class="Delimiter">);</span>
  <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>
  for <span class="Delimiter">(</span>long long int i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>in<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    if <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>
    else <span class="Delimiter">{</span>
      while <span class="Delimiter">(</span>i &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="Delimiter">)</span> != <span class="cSpecial">'\n'</span><span class="Delimiter">)</span>
        ++i<span class="Delimiter">;</span>
      if <span class="Delimiter">(</span>i &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="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>

string to_string<span class="Delimiter">(</span>long long int address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  long long int size = Memory[address]<span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>size == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
  ostringstream tmp<span class="Delimiter">;</span>
  for <span class="Delimiter">(</span>long long int curr = address+<span class="Constant">1</span><span class="Delimiter">;</span> curr &lt;= address+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Comment">// todo: unicode</span>
    tmp &lt;&lt; <span class="Delimiter">(</span>char<span class="Delimiter">)(</span>int<span class="Delimiter">)</span>Memory[curr]<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
<span class="CommentedCode">//?   tb_shutdown(); //? 1</span>
<span class="CommentedCode">//?   cerr &lt;&lt; tmp.str() &lt;&lt; '\n'; //? 1</span>
  <span class="Identifier">return</span> tmp<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

long long int stringified_value_of_location<span class="Delimiter">(</span>long long int address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Comment">// convert to string</span>
  ostringstream out<span class="Delimiter">;</span>
<span class="CommentedCode">//?   trace(1, &quot;foo&quot;) &lt;&lt; &quot;a: &quot; &lt;&lt; address; //? 1</span>
  out &lt;&lt; Memory[address]<span class="Delimiter">;</span>
<span class="CommentedCode">//?   trace(1, &quot;foo&quot;) &lt;&lt; &quot;b: &quot; &lt;&lt; Memory[address]; //? 1</span>
  <span class="Identifier">return</span> new_string<span class="Delimiter">(</span>out<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
<span class="Delimiter">}</span>

bool is_string<span class="Delimiter">(</span>const reagent&amp; x<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> x<span class="Delimiter">.</span>types<span class="Delimiter">.</span>size<span class="Delimiter">()</span> == <span class="Constant">3</span>
      &amp;&amp; x<span class="Delimiter">.</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> == Type_ordinal[<span class="Constant">&quot;address&quot;</span>]
      &amp;&amp; x<span class="Delimiter">.</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">)</span> == Type_ordinal[<span class="Constant">&quot;array&quot;</span>]
      &amp;&amp; x<span class="Delimiter">.</span>types<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">)</span> == Type_ordinal[<span class="Constant">&quot;character&quot;</span>]<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

long long int warnings_from_trace<span class="Delimiter">()</span> <span class="Delimiter">{</span>
  if <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  if <span class="Delimiter">(</span>trace_count<span class="Delimiter">(</span><span class="Constant">&quot;warn&quot;</span><span class="Delimiter">)</span> &lt;= <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
  ostringstream out<span class="Delimiter">;</span>
  for <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>
    if <span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>label != <span class="Constant">&quot;warn&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>
    if <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>
  assert<span class="Delimiter">(</span>!out<span class="Delimiter">.</span>str<span class="Delimiter">().</span>empty<span class="Delimiter">());</span>
  <span class="Identifier">return</span> new_string<span class="Delimiter">(</span>out<span class="Delimiter">.</span>str<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 warnings.</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
bool Loading_interactive = <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Setup&quot;)</span>
Loading_interactive = <span class="Constant">false</span><span class="Delimiter">;</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>
Recipe_ordinal[<span class="Constant">&quot;reload&quot;</span>] = RELOAD<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
case RELOAD: <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)));</span>
  Loading_interactive = <span class="Constant">true</span><span class="Delimiter">;</span>
  Hide_warnings = <span class="Constant">true</span><span class="Delimiter">;</span>
  load<span class="Delimiter">(</span>to_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>
<span class="CommentedCode">//?   static int foo = 0;</span>
<span class="CommentedCode">//?   if (++foo == 2) {</span>
<span class="CommentedCode">//?     tb_shutdown();</span>
<span class="CommentedCode">//?     cerr &lt;&lt; Recipe_ordinal[&quot;new-add&quot;] &lt;&lt; '\n';</span>
<span class="CommentedCode">//?     cerr &lt;&lt; Recipe[Recipe_ordinal[&quot;new-add&quot;]].steps[2].to_string() &lt;&lt; '\n';</span>
<span class="CommentedCode">//?     exit(0);</span>
<span class="CommentedCode">//?   }</span>
  transform_all<span class="Delimiter">();</span>
  Hide_warnings = <span class="Constant">false</span><span class="Delimiter">;</span>
  Loading_interactive = <span class="Constant">false</span><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>warnings_from_trace<span class="Delimiter">());</span>
  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>
</pre>
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