3359

1 files changed, 145 insertions, 0 deletions

diff --git a/062convert_ingredients_to_text.cc b/062convert_ingredients_to_text.cc
new file mode 100644
index 00000000..78765501
--- /dev/null
+++ b/062convert_ingredients_to_text.cc
@@ -0,0 +1,145 @@
+//: make some functions more friendly by trying to auto-convert their ingredients to text
+
+:(scenarios transform)
+:(scenario rewrite_stashes_to_text)
+recipe main [
+  local-scope
+  n:number <- copy 34
+  stash n
+]
++transform: {stash_2_0: ("address" "array" "character")} <- to-text-line {n: "number"}
++transform: stash {stash_2_0: ("address" "array" "character")}
+
+:(scenario rewrite_traces_to_text)
+recipe main [
+  local-scope
+  n:number <- copy 34
+  trace 2, [app], n
+]
++transform: {trace_2_2: ("address" "array" "character")} <- to-text-line {n: "number"}
++transform: trace {2: "literal"}, {"app": "literal-string"}, {trace_2_2: ("address" "array" "character")}
+
+//: special case: rewrite attempts to stash contents of most arrays to avoid
+//: passing addresses around
+
+:(scenario rewrite_stashes_of_arrays)
+recipe main [
+  local-scope
+  n:address:array:number <- new number:type, 3
+  stash *n
+]
++transform: {stash_2_0: ("address" "array" "character")} <- array-to-text-line {n: ("address" "array" "number")}
++transform: stash {stash_2_0: ("address" "array" "character")}
+
+:(scenario ignore_stashes_of_static_arrays)
+recipe main [
+  local-scope
+  n:array:number:3 <- create-array
+  stash n
+]
++transform: stash {n: ("array" "number" "3")}
+
+:(scenario rewrite_stashes_of_recipe_header_products)
+container foo [
+  x:number
+]
+recipe bar -> x:foo [
+  local-scope
+  load-ingredients
+  x <- merge 34
+  stash x
+]
++transform: stash {stash_2_0: ("address" "array" "character")}
+
+//: misplaced; should be in instruction inserting/deleting transforms, but has
+//: prerequisites: deduce_types_from_header and check_or_set_types_by_name
+:(after "Transform.push_back(deduce_types_from_header)")
+Transform.push_back(convert_ingredients_to_text);
+
+:(code)
+void convert_ingredients_to_text(recipe_ordinal r) {
+  recipe& caller = get(Recipe, r);
+  trace(9991, "transform") << "--- convert some ingredients to text in recipe " << caller.name << end();
+  // in recipes without named locations, 'stash' is still not extensible
+  if (contains_numeric_locations(caller)) return;
+  convert_ingredients_to_text(caller);
+}
+
+void convert_ingredients_to_text(recipe& caller) {
+  vector<instruction> new_instructions;
+  for (int i = 0; i < SIZE(caller.steps); ++i) {
+    instruction& inst = caller.steps.at(i);
+    if (inst.name == "stash") {
+      for (int j = 0; j < SIZE(inst.ingredients); ++j) {
+        ostringstream ingredient_name;
+        ingredient_name << "stash_" << i << '_' << j << ":address:array:character";
+        convert_ingredient_to_text(inst.ingredients.at(j), new_instructions, ingredient_name.str());
+      }
+    }
+    else if (inst.name == "trace") {
+      for (int j = /*skip*/2; j < SIZE(inst.ingredients); ++j) {
+        ostringstream ingredient_name;
+        ingredient_name << "trace_" << i << '_' << j << ":address:array:character";
+        convert_ingredient_to_text(inst.ingredients.at(j), new_instructions, ingredient_name.str());
+      }
+    }
+    trace(9993, "transform") << to_string(inst) << end();
+    new_instructions.push_back(inst);
+  }
+  caller.steps.swap(new_instructions);
+}
+
+// add an instruction to convert reagent 'r' to text in list 'out', then
+// replace r with converted text
+void convert_ingredient_to_text(reagent& r, vector<instruction>& out, const string& tmp_var) {
+  if (!r.type) return;  // error; will be handled elsewhere
+  if (is_literal(r)) return;
+  if (is_mu_string(r)) return;
+  // don't try to extend static arrays
+  if (is_static_array(r)) return;
+  instruction def;
+  if (is_lookup_of_address_of_array(r)) {
+    def.name = "array-to-text-line";
+    reagent/*copy*/ tmp = r;
+    drop_one_lookup(tmp);
+    def.ingredients.push_back(tmp);
+  }
+  else {
+    def.name = "to-text-line";
+    def.ingredients.push_back(r);
+  }
+  def.products.push_back(reagent(tmp_var));
+  trace(9993, "transform") << to_string(def) << end();
+  out.push_back(def);
+  r.clear();  // reclaim old memory
+  r = reagent(tmp_var);
+}
+
+bool is_lookup_of_address_of_array(reagent/*copy*/ x) {
+  if (x.type->atom) return false;
+  if (x.type->left->name != "address") return false;
+  if (!canonize_type(x)) return false;
+  return is_mu_array(x);
+}
+
+bool is_static_array(const reagent& x) {
+  // no canonize_type()
+  return !x.type->atom && x.type->left->atom && x.type->left->name == "array";
+}
+
+//: Make sure that the new system is strictly better than just the 'stash'
+//: primitive by itself.
+
+:(scenarios run)
+:(scenario rewrite_stash_continues_to_fall_back_to_default_implementation)
+# type without a to-text implementation
+container foo [
+  x:number
+  y:number
+]
+recipe main [
+  local-scope
+  x:foo <- merge 34, 35
+  stash x
+]
++app: 34 35