1 // RUN: %clang_cc1 -fsyntax-only -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-POD type 'P'}} 14 } 15 16 struct Base { int x; }; 17 struct Derived : Base { int y; }; 18 int o = __builtin_offsetof(Derived, x); // expected-warning{{offset of on non-POD type}} 19 20 const int o2 = sizeof(__builtin_offsetof(Derived, x)); 21 22 struct HasArray { 23 int array[17]; 24 }; 25 26 // Constant and non-constant offsetof expressions 27 void test_ice(int i) { 28 int array0[__builtin_offsetof(HasArray, array[5])]; 29 int array1[__builtin_offsetof(HasArray, array[i])]; // expected-error{{variable length arrays are not permitted in C++}} 30 } 31 32 // Bitfields 33 struct has_bitfields { 34 int i : 7; 35 int j : 12; // expected-note{{bit-field is declared here}} 36 }; 37 38 int test3 = __builtin_offsetof(struct has_bitfields, j); // expected-error{{cannot compute offset of bit-field 'j'}} 39