mu - Soul of a tiny new machine. More thorough tests → More comprehensible and rewrite-friendly software → More resilient society.

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//: 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, "$save-trace", _SAVE_TRACE); :(before "End Primitive Recipe Checks") case _SAVE_TRACE: { break; } :(before "End Primitive Recipe Implementations") case _SAVE_TRACE: { if (Save_trace) { ofstream fout("last_trace"); fout << Trace_stream->readable_contents(""); fout.close(); } break; } //:: 'cheating' by using the host system :(before "End Primitive Recipe Declarations") _PRINT, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "$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; }


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