1 files changed, 31 insertions, 0 deletions
diff --git a/027trace.cc b/027trace.cc
new file mode 100644
index 00000000..71a113ba
--- /dev/null
+++ b/027trace.cc
@@ -0,0 +1,31 @@
+//: Allow mu programs to log facts just like we've been doing in C++ so far.
+
+:(scenario trace)
+recipe main [
+  trace [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")
+Recipe_ordinal["trace"] = TRACE;
+:(before "End Primitive Recipe Implementations")
+case TRACE: {
+  assert(is_literal(current_instruction().ingredients.at(0)));
+  string label = current_instruction().ingredients.at(0).name;
+  assert(is_literal(current_instruction().ingredients.at(1)));
+  string message = current_instruction().ingredients.at(1).name;
+  trace(1, label) << message;
+  break;
+}
+
+:(before "End Primitive Recipe Declarations")
+HIDE_WARNINGS,
+:(before "End Primitive Recipe Numbers")
+Recipe_ordinal["hide-warnings"] = HIDE_WARNINGS;
+:(before "End Primitive Recipe Implementations")
+case HIDE_WARNINGS: {
+  Hide_warnings = true;
+  break;
+}