2 files changed, 56 insertions, 2 deletions
diff --git a/src/CfimOfJson.ml b/src/CfimOfJson.ml
index 156cf42a..2ce70ea3 100644
--- a/src/CfimOfJson.ml
+++ b/src/CfimOfJson.ml
@@ -160,6 +160,60 @@ let rec ty_of_json (r_of_json : json -> ('r, string) result) (js : json) :
       Ok (Assumed (assumed_ty, regions, types))
   | _ -> Error ("ty_of_json failed on:" ^ show js)
 
+let rty_of_json (js : json) : (rty, string) result =
+  ty_of_json region_of_json js
+
+let ety_of_json (js : json) : (ety, string) result =
+  ty_of_json erased_region_of_json js
+
+let field_of_json (js : json) : (field, string) result =
+  match js with
+  | `Assoc [ ("name", name); ("ty", ty) ] ->
+      let* name = string_of_json name in
+      let* ty = rty_of_json ty in
+      Ok { field_name = name; field_ty = ty }
+  | _ -> Error ("field_of_json failed on:" ^ show js)
+
+let variant_of_json (js : json) : (variant, string) result =
+  match js with
+  | `Assoc [ ("name", name); ("fields", fields) ] ->
+      let* name = string_of_json name in
+      let* fields = FieldId.vector_of_json field_of_json fields in
+      Ok { variant_name = name; fields }
+  | _ -> Error ("variant_of_json failed on:" ^ show js)
+
+let type_def_kind_of_json (js : json) : (type_def_kind, string) result =
+  match js with
+  | `Variant ("Struct", Some fields) ->
+      let* fields = FieldId.vector_of_json field_of_json fields in
+      Ok (Struct fields)
+  | `Variant ("Enum", Some variants) ->
+      let* variants = VariantId.vector_of_json variant_of_json variants in
+      Ok (Enum variants)
+  | _ -> Error ("type_def_kind_of_json failed on:" ^ show js)
+
+let type_def_of_json (js : json) : (type_def, string) result =
+  match js with
+  | `Assoc
+      [
+        ("def_id", def_id);
+        ("name", name);
+        ("region_params", region_params);
+        ("type_params", type_params);
+        ("kind", kind);
+      ] ->
+      let* def_id = TypeDefId.id_of_json def_id in
+      let* name = name_of_json name in
+      let* region_params =
+        RegionVarId.vector_of_json region_var_of_json region_params
+      in
+      let* type_params =
+        TypeVarId.vector_of_json type_var_of_json type_params
+      in
+      let* kind = type_def_kind_of_json kind in
+      Ok { def_id; name; region_params; type_params; kind }
+  | _ -> Error ("type_def_of_json failed on:" ^ show js)
+
 (*
 open Values
 open Expressions
diff --git a/src/Types.ml b/src/Types.ml
index cf416750..826531f6 100644
--- a/src/Types.ml
+++ b/src/Types.ml
@@ -85,9 +85,9 @@ type ety = erased_region ty [@@deriving yojson]
     Used in function bodies, "general" value types, etc.
  *)
 
-type field = { name : string; ty : rty } [@@deriving yojson]
+type field = { field_name : string; field_ty : rty } [@@deriving yojson]
 
-type variant = { name : string; fields : field FieldId.vector }
+type variant = { variant_name : string; fields : field FieldId.vector }
 [@@deriving yojson]
 
 type type_def_kind =