forked from OSchip/llvm-project
86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -verify %s -Winvalid-offsetof
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struct NonPOD {
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virtual void f();
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int m;
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};
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struct P {
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NonPOD fieldThatPointsToANonPODType;
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};
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void f() {
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int i = __builtin_offsetof(P, fieldThatPointsToANonPODType.m); // expected-warning{{offset of on non-POD type 'P'}}
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}
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struct Base { int x; };
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struct Derived : Base { int y; };
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int o = __builtin_offsetof(Derived, x); // expected-warning{{offset of on non-POD type}}
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const int o2 = sizeof(__builtin_offsetof(Derived, x));
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struct HasArray {
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int array[17];
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};
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// Constant and non-constant offsetof expressions
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void test_ice(int i) {
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int array0[__builtin_offsetof(HasArray, array[5])];
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int array1[__builtin_offsetof(HasArray, array[i])];
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}
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// Bitfields
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struct has_bitfields {
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int i : 7;
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int j : 12; // expected-note{{bit-field is declared here}}
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};
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int test3 = __builtin_offsetof(struct has_bitfields, j); // expected-error{{cannot compute offset of bit-field 'j'}}
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// offsetof referring to members of a base class.
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struct Base1 {
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int x;
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};
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struct Base2 {
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int y;
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};
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struct Derived2 : public Base1, public Base2 {
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int z;
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};
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int derived1[__builtin_offsetof(Derived2, x) == 0? 1 : -1];
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int derived2[__builtin_offsetof(Derived2, y) == 4? 1 : -1];
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int derived3[__builtin_offsetof(Derived2, z) == 8? 1 : -1];
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// offsetof referring to anonymous struct in base.
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// PR7769
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struct foo {
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struct {
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int x;
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};
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};
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struct bar : public foo {
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};
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int anonstruct[__builtin_offsetof(bar, x) == 0 ? 1 : -1];
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struct LtoRCheck {
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int a[10];
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int f();
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};
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int ltor = __builtin_offsetof(struct LtoRCheck, a[LtoRCheck().f]); // \
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expected-error {{reference to non-static member function must be called}}
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namespace PR17578 {
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struct Base {
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int Field;
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};
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struct Derived : virtual Base {
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void Fun() { (void)__builtin_offsetof(Derived, Field); } // expected-warning {{offset of on non-POD type}} \
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expected-error {{invalid application of 'offsetof' to a field of a virtual base}}
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};
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}
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