1 files changed, 29 insertions, 0 deletions
diff --git a/compiler/LlbcAstUtils.ml b/compiler/LlbcAstUtils.ml
index 1111c297..a982af30 100644
--- a/compiler/LlbcAstUtils.ml
+++ b/compiler/LlbcAstUtils.ml
@@ -12,3 +12,32 @@ let lookup_fun_name (fun_id : fun_id) (fun_decls : fun_decl FunDeclId.Map.t) :
   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.
+
+    [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_decls (k : crate) (filter_assumed : bool) :
+    T.type_decl list * fun_decl list =
+  let open ExtractAssumed in
+  let is_opaque_fun (d : fun_decl) : bool =
+    let sname = name_to_simple_name d.name in
+    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 (SimpleNameMap.mem sname assumed_globals_map))
+  in
+  let is_opaque_type (d : T.type_decl) : bool = d.kind = T.Opaque in
+  (* Note that by checking the function bodies we also the globals *)
+  ( List.filter is_opaque_type (T.TypeDeclId.Map.values k.types),
+    List.filter is_opaque_fun (FunDeclId.Map.values k.functions) )
+
+(** Return true if the crate contains opaque declarations, ignoring the assumed
+    definitions. *)
+let crate_has_opaque_decls (k : crate) (filter_assumed : bool) : bool =
+  crate_get_opaque_decls k filter_assumed <> ([], [])