clang/test/SemaCXX/offsetof-0x.cpp

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -std=c++11 -verify %s -Winvalid-offsetof
   2
   3 struct NonPOD {
   4   virtual void f();
   5   int m;
   6 };
   7
   8 struct P {
   9   NonPOD fieldThatPointsToANonPODType;
  10 };
  11
  12 void f() {
  13   int i = __builtin_offsetof(P, fieldThatPointsToANonPODType.m); // expected-warning{{offset of on non-standard-layout type 'P'}}
  14 }
  15
  16 struct StandardLayout {
  17   int x;
  18   StandardLayout() {}
  19 };
  20 int o = __builtin_offsetof(StandardLayout, x); // no-warning