1 files changed, 187 insertions, 0 deletions
diff --git a/cpp/020run b/cpp/020run
new file mode 100644
index 00000000..91e242a7
--- /dev/null
+++ b/cpp/020run
@@ -0,0 +1,187 @@
+:(scenarios run)
+:(scenario copy_literal)
+recipe main [
+  1:integer <- copy 23:literal
+]
++run: instruction main/0
++run: ingredient 0 is 23
++mem: storing 23 in location 1
+
+:(scenario copy)
+recipe main [
+  1:integer <- copy 23:literal
+  2:integer <- copy 1:integer
+]
++run: instruction main/1
++run: ingredient 0 is 1
++mem: location 1 is 23
++mem: storing 23 in location 2
+
+:(before "End Types")
+// Book-keeping while running a recipe.
+//: Later layers will change this.
+struct routine {
+  recipe_number running_recipe;
+  size_t running_at;
+  routine(recipe_number r) :running_recipe(r), running_at(0) {}
+};
+
+:(before "End Globals")
+routine* Current_routine = NULL;
+
+:(code)
+void run(recipe_number r) {
+  run(routine(r));
+}
+
+void run(routine rr) {
+  Current_routine = &rr;
+  while (!done(rr)) {
+    vector<instruction>& instructions = steps(rr);
+    size_t& pc = running_at(rr);
+    // Running one instruction.
+    if (instructions[pc].is_label) { ++pc; continue; }
+//?     cout << "AAA " << Trace_stream << " ^" << Trace_stream->dump_layer << "$\n"; //? 1
+    trace("run") << "instruction " << recipe_name(rr) << '/' << pc;
+//?     cout << "operation " << instructions[pc].operation << '\n'; //? 3
+//?     if (!instructions[pc].products.empty()) trace("foo") << "AAA product 0 is " << instructions[pc].products[0].to_string(); //? 1
+    switch (instructions[pc].operation) {
+      // Primitive Recipe Implementations
+      case COPY: {
+        trace("run") << "ingredient 0 is " << instructions[pc].ingredients[0].name;
+        vector<int> data = read_memory(instructions[pc].ingredients[0]);
+        write_memory(instructions[pc].products[0], data);
+        break;
+      }
+      // End Primitive Recipe Implementations
+      default: {
+        cout << "not a primitive op: " << instructions[pc].operation << '\n';
+      }
+    }
+    ++pc;
+  }
+  Current_routine = NULL;
+}
+
+//: Some helpers.
+//: We'll need to override these later as we change the definition of routine.
+//: Important that they return referrences into the routine.
+inline size_t& running_at(routine& rr) {
+  return rr.running_at;
+}
+
+inline string recipe_name(routine& rr) {
+  return Recipe[rr.running_recipe].name;
+}
+
+inline vector<instruction>& steps(routine& rr) {
+  return Recipe[rr.running_recipe].steps;
+}
+
+inline bool done(routine& rr) {
+  return running_at(rr) >= steps(rr).size();
+}
+
+:(before "End Main")
+if (argc > 1) {
+  setup();
+  for (int i = 1; i < argc; ++i) {
+    load(argv[i]);
+  }
+
+  Trace_stream = new trace_stream;
+//?   Trace_stream->dump_layer = "all"; //? 2
+  transform_all();
+  recipe_number r = Recipe_number[string("main")];
+  if (r) run(r);
+  dump_memory();
+}
+
+:(code)
+void load(string filename) {
+  ifstream fin(filename.c_str());
+  if (!fin) {
+    raise << "no such file " << filename << '\n';
+    return;
+  }
+  fin >> std::noskipws;
+  add_recipes(fin);
+  transform_all();
+  fin.close();
+}
+
+//: On startup, load everything in core.mu
+:(before "End Load Recipes")
+load("core.mu");
+recently_added_recipes.clear();  // freeze everything so it doesn't get cleared by tests
+
+//: helper for tests
+
+:(code)
+void run(string form) {
+  vector<recipe_number> tmp = add_recipes(form);
+  transform_all();
+  run(tmp.front());
+}
+
+:(code)
+vector<int> read_memory(reagent x) {
+//?   cout << "read_memory: " << x.to_string() << '\n'; //? 1
+  vector<int> result;
+  if (isa_literal(x)) {
+    result.push_back(x.value);
+    return result;
+  }
+  int base = x.value;
+  size_t size = size_of(x);
+  for (size_t offset = 0; offset < size; ++offset) {
+    int val = Memory[base+offset];
+    trace("mem") << "location " << base+offset << " is " << val;
+    result.push_back(val);
+  }
+  return result;
+}
+
+void write_memory(reagent x, vector<int> data) {
+  if (is_dummy(x)) return;
+  int base = x.value;
+  if (size_of(x) != data.size())
+    raise << "size mismatch in storing to " << x.to_string() << '\n';
+  for (size_t offset = 0; offset < data.size(); ++offset) {
+    trace("mem") << "storing " << data[offset] << " in location " << base+offset;
+    Memory[base+offset] = data[offset];
+  }
+}
+
+:(code)
+size_t size_of(const reagent& r) {
+  return size_of(r.types);
+}
+size_t size_of(const vector<type_number>& types) {
+  // End size_of(types) Cases
+  return 1;
+}
+
+bool is_dummy(const reagent& x) {
+  return x.name == "_";
+}
+
+bool isa_literal(const reagent& r) {
+  return r.types.size() == 1 && r.types[0] == 0;
+}
+
+:(scenario run_label)
+recipe main [
+  +foo
+  1:integer <- copy 23:literal
+  2:integer <- copy 1:integer
+]
++run: instruction main/1
++run: instruction main/2
+-run: instruction main/0
+
+:(scenario run_dummy)
+recipe main [
+  _ <- copy 0:literal
+]
++run: instruction main/0