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151pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
#!/bin/sh
# returns 0 on successful build or nothing to build
# non-zero exit status only on error during building
set -e  # stop i
//: Allow Mu programs to log facts just like we've been doing in C++ so far.

:(scenario trace)
def main [
  trace 1, [foo], [this is a trace in Mu]
]
+foo: this is a trace in Mu

:(before "End Primitive Recipe Declarations")
TRACE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "trace", TRACE);
:(before "End Primitive Recipe Checks")
case TRACE: {
  if (SIZE(inst.ingredients) < 3) {
    raise << maybe(get(Recipe, r).name) << "'trace' takes three or more ingredients rather than '" << to_original_string(inst) << "'\n" << end();
    break;
  }
  if (!is_mu_number(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of 'trace' should be a number (depth), but got '" << inst.ingredients.at(0).original_string << "'\n" << end();
    break;
  }
  if (!is_literal_text(inst.ingredients.at(1))) {
    raise << maybe(get(Recipe, r).name) << "second ingredient of 'trace' should be a literal string (label), but got '" << inst.ingredients.at(1).original_string << "'\n" << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case TRACE: {
  int depth = ingredients.at(0).at(0);
  string label = current_instruction().ingredients.at(1).name;
  ostringstream out;
  for (int i = 2;  i < SIZE(current_instruction().ingredients);  ++i) {
    if (i > 2) out << ' ';
    out << inspect(current_instruction().ingredients.at(i), ingredients.at(i));
  }
  trace(depth, label) << out.str() << end();
  break;
}

//: simpler limited version of 'trace'

:(before "End Primitive Recipe Declarations")
STASH,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "stash", STASH);
:(before "End Primitive Recipe Checks")
case STASH: {
  break;
}
:(before "End Primitive Recipe Implementations")
case STASH: {
  ostringstream out;
  for (int i = 0;  i < SIZE(current_instruction().ingredients);  ++i) {
    if (i) out << ' ';
    out << inspect(current_instruction().ingredients.at(i), ingredients.at(i));
  }
  trace(2, "app") << out.str() << end();
  break;
}

:(scenario stash_literal_string)
def main [
  stash [foo]
]
+app: foo

:(scenario stash_literal_number)
def main [
  stash [foo:], 4
]
+app: foo: 4

:(scenario stash_number)
def main [
  1:num <- copy 34
  stash [foo:], 1:num
]
+app: foo: 34

:(code)
string inspect(const reagent& r, const vector<double>& data) {
  if (is_literal(r))
    return r.name;
  // End inspect Special-cases(r, data)
  ostringstream out;
  for (long long i = 0;  i < SIZE(data);  ++i) {
    if (i) out << ' ';
    out << no_scientific(data.at(i));
  }
  return out.str();
}

:(before "End Primitive Recipe Declarations")
HIDE_ERRORS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "hide-errors", HIDE_ERRORS);
:(before "End Primitive Recipe Checks")
case HIDE_ERRORS: {
  break;
}
:(before "End Primitive Recipe Implementations")
case HIDE_ERRORS: {
  Hide_errors = true;
  break;
}

:(before "End Primitive Recipe Declarations")
SHOW_ERRORS,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "show-errors", SHOW_ERRORS);
:(before "End Primitive Recipe Checks")
case SHOW_ERRORS: {
  break;
}
:(before "End Primitive Recipe Implementations")
case SHOW_ERRORS: {
  Hide_errors = false;
  break;
}

:(before "End Primitive Recipe Declarations")
TRACE_UNTIL,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "trace-until", TRACE_UNTIL);
:(before "End Primitive Recipe Checks")
case TRACE_UNTIL: {
  break;
}
:(before "End Primitive Recipe Implementations")
case TRACE_UNTIL: {
  if (Trace_stream) {
    Trace_stream->collect_depth = ingredients.at(0).at(0);
  }
  break;
}

:(before "End Primitive Recipe Declarations")
_DUMP_TRACE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$dump-trace", _DUMP_TRACE);
:(before "End Primitive Recipe Checks")
case _DUMP_TRACE: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _DUMP_TRACE: {
  if (ingredients.empty()) {
    DUMP("");
  }
  else {
    DUMP(current_instruction().ingredients.at(0).name);
  }
  break;
}

:(before "End Primitive Recipe Declarations")
_CLEAR_TRACE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$clear-trace", _CLEAR_TRACE);
:(before "End Primitive Recipe Checks")
case _CLEAR_TRACE: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _CLEAR_TRACE: {
  if (Trace_stream) Trace_stream->past_lines.clear();
  break;
}

:(before "End Primitive Recipe Declarations")
_SAVE_TRACE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$save-trace", _SAVE_TRACE);
:(before "End Primitive Recipe Checks")
case _SAVE_TRACE: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _SAVE_TRACE: {
  if (Save_trace) Trace_stream->dump();
  break;
}

//:: 'cheating' by using the host system

:(before "End Primitive Recipe Declarations")
_PRINT,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$print", _PRINT);
:(before "End Primitive Recipe Checks")
case _PRINT: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _PRINT: {
  for (int i = 0;  i < SIZE(ingredients);  ++i) {
    if (is_literal(current_instruction().ingredients.at(i))) {
      trace(9998, "run") << "$print: " << current_instruction().ingredients.at(i).name << end();
      if (!has_property(current_instruction().ingredients.at(i), "newline")) {
        cout << current_instruction().ingredients.at(i).name;
      }
      // hack: '$print 10' prints '10', but '$print 10/newline' prints '\n'
      // End $print 10/newline Special-cases
      else {
        cout << '\n';
      }
    }
    // End $print Special-cases
    else {
      for (int j = 0;  j < SIZE(ingredients.at(i));  ++j) {
        trace(9998, "run") << "$print: " << ingredients.at(i).at(j) << end();
        if (j > 0) cout << " ";
        cout << no_scientific(ingredients.at(i).at(j));
      }
    }
  }
  cout.flush();
  break;
}

:(before "End Primitive Recipe Declarations")
_EXIT,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$exit", _EXIT);
:(before "End Primitive Recipe Checks")
case _EXIT: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _EXIT: {
  exit(0);
  break;
}

:(before "End Primitive Recipe Declarations")
_SYSTEM,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$system", _SYSTEM);
:(before "End Primitive Recipe Checks")
case _SYSTEM: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$system' requires exactly one ingredient, but got '" << to_string(inst) << "'\n" << end();
    break;
  }
  if (!is_literal_text(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "ingredient to '$system' must be a literal text, but got '" << to_string(inst) << "'\n" << end();
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case _SYSTEM: {
  int status = system(current_instruction().ingredients.at(0).name.c_str());
  products.resize(1);
  products.at(0).push_back(status);
  break;
}

:(before "End Primitive Recipe Declarations")
_DUMP_MEMORY,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$dump-memory", _DUMP_MEMORY);
:(before "End Primitive Recipe Checks")
case _DUMP_MEMORY: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _DUMP_MEMORY: {
  dump_memory();
  break;
}

//: In times of real extremis we need to create a whole new modality for debug
//: logs, independent of other changes to the screen or Trace_stream.

:(before "End Globals")
ofstream LOG;
:(before "End One-time Setup")
//? LOG.open("log");

:(before "End Primitive Recipe Declarations")
_LOG,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$log", _LOG);
:(before "End Primitive Recipe Checks")
case _LOG: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _LOG: {
  ostringstream out;
  for (int i = 0;  i < SIZE(current_instruction().ingredients);  ++i) {
    out << inspect(current_instruction().ingredients.at(i), ingredients.at(i));
  }
  LOG << out.str() << '\n';
  break;
}

//: set a variable from within Mu code
//: useful for selectively tracing or printing after some point
:(before "End Globals")
bool Foo = false;
:(before "End Primitive Recipe Declarations")
_FOO,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$foo", _FOO);
:(before "End Primitive Recipe Checks")
case _FOO: {
  break;
}
:(before "End Primitive Recipe Implementations")
case _FOO: {
  Foo = true;
  break;
}