[PATCH] D79009: [AST] Preserve the incomplete-type member expr.

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: sammccall.
Herald added a project: clang.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D79009

Files:
  clang/lib/Sema/SemaExprCXX.cpp
  clang/test/AST/ast-dump-recovery.cpp


Index: clang/test/AST/ast-dump-recovery.cpp
===================================================================
--- clang/test/AST/ast-dump-recovery.cpp
+++ clang/test/AST/ast-dump-recovery.cpp
@@ -104,6 +104,16 @@
 // CHECK-NEXT:|   `-UnresolvedLookupExpr {{.*}} 'invalid'
 struct alignas(invalid()) Aligned {};
 
+struct Incomplete;
+Incomplete make_incomplete();
+// CHECK: FunctionDecl {{.*}} test2
+// CHECK-NEXT: `-CompoundStmt
+// CHECK-NEXT:  `-RecoveryExpr {{.*}} contains-errors
+// CHECK-NEXT:   `-UnresolvedLookupExpr {{.*}} 'make_incomplete'
+void test2() {
+  make_incomplete();
+}
+
 void InvalidInitalizer(int x) {
   struct Bar { Bar(); };
   // CHECK:     `-VarDecl {{.*}} a1 'Bar'
Index: clang/lib/Sema/SemaExprCXX.cpp
===================================================================
--- clang/lib/Sema/SemaExprCXX.cpp
+++ clang/lib/Sema/SemaExprCXX.cpp
@@ -7219,8 +7219,11 @@
   //   the member function body.
   if (!BaseType->isDependentType() &&
       !isThisOutsideMemberFunctionBody(BaseType) &&
-      RequireCompleteType(OpLoc, BaseType, diag::err_incomplete_member_access))
+      RequireCompleteType(OpLoc, BaseType, diag::err_incomplete_member_access)) {
+    if (Base->containsErrors())
+      return Base;
     return ExprError();
+  }
 
   // C++ [basic.lookup.classref]p2:
   //   If the id-expression in a class member access (5.2.5) is an


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