Change the way nested structs are translated

Summary:
public
Reuse logic in cFrontend.ml to deal with nested structs. This allows to have less duplicated logic which will result
in less bugs.
As a bonus, it fixes the problem of nested template class (which wasn't be handled right).
And one random fix in c_type -> sil_type conversion (I'm amazed it worked before)

Reviewed By: dulmarod

Differential Revision: D2773687

fb-gh-sync-id: e312599

infer/src/clang/cFrontend.ml

@@ -96,14 +96,17 @@ let rec translate_one_declaration tenv cg cfg parent_dec dec =
      | dec -> ());
   match dec with
   (* Currently C/C++ record decl treated in the same way *)
-  | ClassTemplateSpecializationDecl (_, _, _, _, decl_list, _, _, _)
-  | CXXRecordDecl (_, _, _, _, decl_list, _, _, _)
-  | RecordDecl (_, _, _, _, decl_list, _, _) ->
+  | ClassTemplateSpecializationDecl (decl_info, _, _, _, decl_list, _, _, _)
+  | CXXRecordDecl (decl_info, _, _, _, decl_list, _, _, _)
+  | RecordDecl (decl_info, _, _, _, decl_list, _, _) when not decl_info.di_is_implicit ->
+      let is_method_decl decl = match decl with
+        | CXXMethodDecl _ | CXXConstructorDecl _ | CXXDestructorDecl _ | FunctionTemplateDecl _ ->
+            true
+        | _ -> false in
+      let method_decls, no_method_decls = IList.partition is_method_decl decl_list in
+      IList.iter (translate_one_declaration tenv cg cfg dec) no_method_decls;
       ignore (CTypes_decl.add_types_from_decl_to_tenv tenv dec);
-      let method_decls = CTypes_decl.get_method_decls dec decl_list in
-      let tranlate_method (parent, decl) =
-        translate_one_declaration tenv cg cfg parent decl in
-      IList.iter tranlate_method method_decls
+      IList.iter (translate_one_declaration tenv cg cfg dec) method_decls
   | EnumDecl _ -> ignore (CEnum_decl.enum_decl dec)
   | LinkageSpecDecl (decl_info, decl_list, decl_context_info) ->
       Printing.log_out "ADDING: LinkageSpecDecl decl list\n";

infer/src/clang/cType_to_sil_type.ml

@@ -132,6 +132,7 @@ and decl_ptr_to_sil_type translate_decl tenv decl_ptr =
     match Ast_utils.get_decl decl_ptr with
     | Some (CXXRecordDecl _ as d)
     | Some (RecordDecl _ as d)
+    | Some (ClassTemplateSpecializationDecl _ as d)
     | Some (ObjCInterfaceDecl _ as d)
     | Some (ObjCImplementationDecl _ as d)
     | Some (ObjCProtocolDecl _ as d)

infer/src/clang/cTypes_decl.ml

@@ -99,20 +99,6 @@ let get_record_name_csu decl =
 
 let get_record_name decl = snd (get_record_name_csu decl)
 
-let get_method_decls parent decl_list =
-  let open Clang_ast_t in
-  let rec traverse_decl parent decl = match decl with
-    | CXXMethodDecl _ | CXXConstructorDecl _ | CXXDestructorDecl _ -> [(parent, decl)]
-    | FunctionTemplateDecl (_, _, template_decl_info) ->
-        let decl_list' = template_decl_info.Clang_ast_t.tdi_specializations in
-        traverse_decl_list parent decl_list'
-    | ClassTemplateSpecializationDecl (_, _, _, _, decl_list', _, _, _)
-    | CXXRecordDecl (_, _, _, _, decl_list', _, _, _)
-    | RecordDecl (_, _, _, _, decl_list', _, _) -> traverse_decl_list decl decl_list'
-    | _ -> []
-  and traverse_decl_list parent decl_list = IList.flatten (IList.map (traverse_decl parent) decl_list)  in
-  traverse_decl_list parent decl_list
-
 let get_class_methods tenv class_name decl_list =
   let process_method_decl = function
     | Clang_ast_t.CXXMethodDecl (decl_info, name_info, tp, function_decl_info, _)
@@ -167,12 +153,6 @@ let rec get_struct_fields tenv decl =
         let typ = type_ptr_to_sil_type tenv type_ptr in
         let annotation_items = [] in (* For the moment we don't use them*)
         [(id, typ, annotation_items)]
-    | ClassTemplateSpecializationDecl (decl_info, _, _, _, _, _, _, _)
-    | CXXRecordDecl (decl_info, _, _, _, _, _, _, _)
-    | RecordDecl (decl_info, _, _, _, _, _, _) ->
-        (* C++/C Records treated in the same way*)
-        if not decl_info.Clang_ast_t.di_is_implicit then
-          ignore (add_types_from_decl_to_tenv tenv decl); []
     | _ -> [] in
   let base_decls = get_superclass_decls decl in
   let base_class_fields = IList.map (get_struct_fields tenv) base_decls in

infer/src/clang/cTypes_decl.mli

@@ -13,8 +13,6 @@ val add_struct_to_tenv : Sil.tenv -> Sil.typ -> unit
 
 val get_record_name : Clang_ast_t.decl -> string
 
-val get_method_decls : Clang_ast_t.decl -> Clang_ast_t.decl list -> (Clang_ast_t.decl * Clang_ast_t.decl) list
-
 val add_types_from_decl_to_tenv : Sil.tenv -> Clang_ast_t.decl -> Sil.typ
 
 (* Adds the predefined types objc_class which is a struct, *)