From 69f04c3fb0136778b80f7f64e16ae37cf8d22907 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Sun, 15 Mar 2015 09:49:23 -0700
Subject: 929 - recipes again take ingredients and reply with results

---
 cpp/.traces/calling_recipe  |  2 +-
 cpp/.traces/next_ingredient |  6 ------
 cpp/021call_ingredient      | 44 ++++++++++++++++++++++++++++++++++++++++++++
 cpp/022call_reply           | 39 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 84 insertions(+), 7 deletions(-)
 create mode 100644 cpp/021call_ingredient
 create mode 100644 cpp/022call_reply

diff --git a/cpp/.traces/calling_recipe b/cpp/.traces/calling_recipe
index c0538ca8..3c220e09 100644
--- a/cpp/.traces/calling_recipe
+++ b/cpp/.traces/calling_recipe
@@ -1,4 +1,4 @@
-parse/0: instruction: 23
+parse/0: instruction: 25
 parse/0: instruction: 2
 parse/0:   ingredient: {name: "2", type: 0}
 parse/0:   ingredient: {name: "2", type: 0}
diff --git a/cpp/.traces/next_ingredient b/cpp/.traces/next_ingredient
index 1970698a..8ded3d51 100644
--- a/cpp/.traces/next_ingredient
+++ b/cpp/.traces/next_ingredient
@@ -16,9 +16,3 @@ run/0: ingredient 1 is 12
 mem/0: location 12 is 2
 run/0: product 0 is 3
 mem/0: storing in location 13
-run/0: instruction main/1
-run/0: ingredient 0 is 1
-run/0: ingredient 1 is 12
-mem/0: location 12 is 2
-run/0: product 0 is 3
-mem/0: storing in location 13
diff --git a/cpp/021call_ingredient b/cpp/021call_ingredient
new file mode 100644
index 00000000..f42f0b48
--- /dev/null
+++ b/cpp/021call_ingredient
@@ -0,0 +1,44 @@
+// Calls can take ingredients just like primitives. To access a recipe's
+// ingredients, use 'next_ingredient'.
+:(scenario "next_ingredient")
+recipe main [
+  f 2:literal
+]
+recipe f [
+  12:integer <- next_ingredient
+  13:integer <- add 1:literal, 12:integer
+]
++run: instruction f/1
++mem: location 12 is 2
++mem: storing in location 13
+
+:(before "End Call Fields")
+vector<vector<int> > ingredient_atoms;
+size_t next_ingredient_to_process;
+:(replace{} "call(recipe_number r)")
+call(recipe_number r) :running_recipe(r), pc(0), next_ingredient_to_process(0) {}
+
+:(replace "rr.calls.push(call(instructions[pc].operation))" following "End Primitive Recipe Implementations")
+call callee(instructions[pc].operation);
+for (vector<reagent>::iterator p = instructions[pc].ingredients.begin(); p != instructions[pc].ingredients.end(); ++p) {
+  callee.ingredient_atoms.push_back(read_memory(*p));
+}
+rr.calls.push(callee);
+
+:(before "End Globals")
+const int NEXT_INGREDIENT = 22;
+:(before "End Primitive Recipe Numbers")
+Recipe_number["next_ingredient"] = NEXT_INGREDIENT;
+assert(Next_recipe_number == NEXT_INGREDIENT);
+Next_recipe_number++;
+:(before "End Primitive Recipe Implementations")
+case NEXT_INGREDIENT: {
+  if (rr.calls.top().next_ingredient_to_process < rr.calls.top().ingredient_atoms.size()) {
+    trace("run") << "product 0 is "
+        << rr.calls.top().ingredient_atoms[rr.calls.top().next_ingredient_to_process][0];
+    write_memory(instructions[pc].products[0],
+        rr.calls.top().ingredient_atoms[rr.calls.top().next_ingredient_to_process]);
+    ++rr.calls.top().next_ingredient_to_process;
+  }
+  break;
+}
diff --git a/cpp/022call_reply b/cpp/022call_reply
new file mode 100644
index 00000000..0d0149cb
--- /dev/null
+++ b/cpp/022call_reply
@@ -0,0 +1,39 @@
+// Calls can also generate results, using 'reply'.
+:(scenario "reply")
+recipe main [
+  3:integer, 4:integer <- f 2:literal
+]
+recipe f [
+  12:integer <- next_ingredient
+  13:integer <- add 1:literal, 12:integer
+  reply 12:integer, 13:integer
+]
++run: instruction main/0
++run: result 0 is 1[2...]
++mem: storing in location 3
++run: result 1 is 1[3...]
++mem: storing in location 4
+
+:(before "End Globals")
+const int REPLY = 23;
+:(before "End Primitive Recipe Numbers")
+Recipe_number["reply"] = REPLY;
+assert(Next_recipe_number == REPLY);
+Next_recipe_number++;
+:(before "End Primitive Recipe Implementations")
+case REPLY: {
+  vector<vector<int> > callee_results;
+  for (size_t i = 0; i < instructions[pc].ingredients.size(); ++i) {
+    callee_results.push_back(read_memory(instructions[pc].ingredients[i]));
+  }
+  rr.calls.pop();
+  size_t& caller_pc = rr.calls.top().pc;
+  instruction& caller_instruction = Recipe[rr.calls.top().running_recipe].steps[caller_pc];
+  assert(caller_instruction.products.size() <= callee_results.size());
+  for (size_t i = 0; i < caller_instruction.products.size(); ++i) {
+    trace("run") << "result " << i << " is " << callee_results[i].size() << "[" << callee_results[i][0] << "...]";
+    write_memory(caller_instruction.products[i], callee_results[i]);
+  }
+  ++caller_pc;
+  break;
+}
-- 
cgit 1.4.1-2-gfad0