From 83ed1022f9fb4e2042d048d6576898d5d4bef26b Mon Sep 17 00:00:00 2001
From: Son Ho
Date: Wed, 8 Dec 2021 16:00:06 +0100
Subject: Generate iterators for Contexts.env

---
 src/Contexts.ml | 43 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/src/Contexts.ml b/src/Contexts.ml
index 2d09cb25..cc28dd27 100644
--- a/src/Contexts.ml
+++ b/src/Contexts.ml
@@ -13,10 +13,45 @@ type binder = {
 (** Environment value: mapping from variable to value, abstraction (only
     used in symbolic mode) or stack frame delimiter.
  *)
-type env_elem = Var of binder * typed_value | Abs of abs | Frame
-[@@deriving show]
-
-type env = env_elem list [@@deriving show]
+type env_elem = Var of (binder[@opaque]) * typed_value | Abs of abs | Frame
+[@@deriving
+  show,
+    visitors
+      {
+        name = "iter_env_elem";
+        variety = "iter";
+        ancestors = [ "iter_abs" ];
+        nude = true (* Don't inherit [VisitorsRuntime.iter] *);
+        concrete = true;
+      },
+    visitors
+      {
+        name = "map_env_elem";
+        variety = "map";
+        ancestors = [ "map_abs" ];
+        nude = true (* Don't inherit [VisitorsRuntime.iter] *);
+        concrete = true;
+      }]
+
+type env = env_elem list
+[@@deriving
+  show,
+    visitors
+      {
+        name = "iter_env";
+        variety = "iter";
+        ancestors = [ "iter_env_elem" ];
+        nude = true (* Don't inherit [VisitorsRuntime.iter] *);
+        concrete = true;
+      },
+    visitors
+      {
+        name = "map_env";
+        variety = "map";
+        ancestors = [ "map_env_elem" ];
+        nude = true (* Don't inherit [VisitorsRuntime.iter] *);
+        concrete = true;
+      }]
 
 type interpreter_mode = ConcreteMode | SymbolicMode [@@deriving show]
 
-- 
cgit v1.2.3