1046 - mu programs can now add to the trace

Still just raw strings, but interpolation is coming.

2 files changed, 28 insertions, 0 deletions

diff --git a/cpp/.traces/trace b/cpp/.traces/trace
new file mode 100644
index 00000000..fb4fd081
--- /dev/null
+++ b/cpp/.traces/trace
@@ -0,0 +1,7 @@
+parse/0: instruction: 32
+parse/0:   ingredient: {name: "foo", value: 0, type: 0, properties: ["foo": "literal-string"]}
+parse/0:   ingredient: {name: "this is a trace in mu", value: 0, type: 0, properties: ["this is a trace in mu": "literal-string"]}
+after-brace/0: recipe main
+after-brace/0: trace ...
+run/0: instruction main/0
+foo/0: this is a trace in mu
diff --git a/cpp/032trace b/cpp/032trace
new file mode 100644
index 00000000..3a7b0b0e
--- /dev/null
+++ b/cpp/032trace
@@ -0,0 +1,21 @@
+:(scenario "trace")
+recipe main [
+  trace [foo], [this is a trace in mu]
+]
++foo: this is a trace in mu
+
+:(before "End Globals")
+const int TRACE = 32;
+:(before "End Primitive Recipe Numbers")
+Recipe_number["trace"] = TRACE;
+assert(Next_recipe_number == TRACE);
+Next_recipe_number++;
+:(before "End Primitive Recipe Implementations")
+case TRACE: {
+  assert(isa_literal(instructions[pc].ingredients[0]));
+  string label = instructions[pc].ingredients[0].name;
+  assert(isa_literal(instructions[pc].ingredients[1]));
+  string message = instructions[pc].ingredients[1].name;
+  trace(label) << message;
+  break;
+}