1 files changed, 56 insertions, 7 deletions
diff --git a/compiler/LlbcAstUtils.ml b/compiler/LlbcAstUtils.ml
index 1111c297..ffdce481 100644
--- a/compiler/LlbcAstUtils.ml
+++ b/compiler/LlbcAstUtils.ml
@@ -1,14 +1,63 @@
+open Types
 open LlbcAst
 include Charon.LlbcAstUtils
+open Collections
+
+module FunIdOrderedType : OrderedType with type t = fun_id = struct
+  type t = fun_id
+
+  let compare = compare_fun_id
+  let to_string = show_fun_id
+  let pp_t = pp_fun_id
+  let show_t = show_fun_id
+end
+
+module FunIdMap = Collections.MakeMap (FunIdOrderedType)
+module FunIdSet = Collections.MakeSet (FunIdOrderedType)
 
 let lookup_fun_sig (fun_id : fun_id) (fun_decls : fun_decl FunDeclId.Map.t) :
     fun_sig =
   match fun_id with
-  | Regular id -> (FunDeclId.Map.find id fun_decls).signature
-  | Assumed aid -> Assumed.get_assumed_sig aid
+  | FRegular id -> (FunDeclId.Map.find id fun_decls).signature
+  | FAssumed aid -> Assumed.get_assumed_fun_sig aid
 
-let lookup_fun_name (fun_id : fun_id) (fun_decls : fun_decl FunDeclId.Map.t) :
-    Names.fun_name =
-  match fun_id with
-  | Regular id -> (FunDeclId.Map.find id fun_decls).name
-  | Assumed aid -> Assumed.get_assumed_name aid
+(** Return the opaque declarations found in the crate, which are also *not builtin*.
+
+    [filter_assumed]: if [true], do not consider as opaque the external definitions
+    that we will map to definitions from the standard library.
+
+    Remark: the list of functions also contains the list of opaque global bodies.
+ *)
+let crate_get_opaque_non_builtin_decls (k : crate) (filter_assumed : bool) :
+    type_decl list * fun_decl list =
+  let open ExtractBuiltin in
+  let ctx : Charon.NameMatcher.ctx =
+    {
+      type_decls = k.type_decls;
+      global_decls = k.global_decls;
+      trait_decls = k.trait_decls;
+    }
+  in
+  let is_opaque_fun (d : fun_decl) : bool =
+    d.body = None
+    (* Something to pay attention to: we must ignore trait method *declarations*
+       (which don't have a body but must not be considered as opaque) *)
+    && (match d.kind with TraitMethodDecl _ -> false | _ -> true)
+    && ((not filter_assumed)
+       || (not (NameMatcherMap.mem ctx d.name builtin_globals_map))
+          && not (NameMatcherMap.mem ctx d.name (builtin_funs_map ())))
+  in
+  let is_opaque_type (d : type_decl) : bool =
+    d.kind = Opaque
+    && ((not filter_assumed)
+       || not (NameMatcherMap.mem ctx d.name (builtin_types_map ())))
+  in
+  (* Note that by checking the function bodies we also the globals *)
+  ( List.filter is_opaque_type (TypeDeclId.Map.values k.type_decls),
+    List.filter is_opaque_fun (FunDeclId.Map.values k.fun_decls) )
+
+(** Return true if the crate contains opaque declarations, ignoring the assumed
+    definitions. *)
+let crate_has_opaque_non_builtin_decls (k : crate) (filter_assumed : bool) :
+    bool =
+  crate_get_opaque_non_builtin_decls k filter_assumed <> ([], [])