73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify=silent %s
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// RUN: %clang_cc1 -fsyntax-only -verify=cpp -x c++ %s
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// RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-comment -verify %s
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// RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-comment -std=c89 -verify %s
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// RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-comment -std=c99 -verify %s
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// RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-comment -std=c11 -verify %s
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// RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-comment -std=c17 -verify %s
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// RUN: %clang_cc1 -fsyntax-only -pedantic -Wno-comment -std=c2x -verify %s
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// silent-no-diagnostics
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// Reject definitions in __builtin_offsetof
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// https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2350.htm
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int simple(void) {
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return __builtin_offsetof(struct A // cpp-error {{'A' cannot be defined in a type specifier}} \
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expected-warning {{defining a type within '__builtin_offsetof' is a Clang extension}}
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{
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int a;
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struct B // expected-warning {{defining a type within '__builtin_offsetof' is a Clang extension}}
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{
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int c;
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int d;
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} x;
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}, a);
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}
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int anonymous_struct(void) {
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return __builtin_offsetof(struct // cpp-error-re {{'(unnamed struct at {{.*}})' cannot be defined in a type specifier}} \
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expected-warning {{defining a type within '__builtin_offsetof' is a Clang extension}}
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{
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int a;
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int b;
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}, a);
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}
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int struct_in_second_param(void) {
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struct A {
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int a, b;
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int x[20];
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};
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return __builtin_offsetof(struct A, x[sizeof(struct B{int a;})]); // cpp-error {{'B' cannot be defined in a type specifier}}
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}
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#define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
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int macro(void) {
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return offsetof(struct A // cpp-error {{'A' cannot be defined in a type specifier}} \
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expected-warning 2 {{defining a type within 'offsetof' is a Clang extension}}
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{
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int a;
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struct B // verifier seems to think the error is emitted by the macro
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// In fact the location of the error is "B" on the line above
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{
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int c;
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int d;
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} x;
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}, a);
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}
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#undef offsetof
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#define offsetof(TYPE, MEMBER) (&((TYPE *)0)->MEMBER)
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// no warning for traditional offsetof as a function-like macro
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int * macro_func(void) {
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return offsetof(struct A // cpp-error {{'A' cannot be defined in a type specifier}}
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{
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int a;
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int b;
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}, a);
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}
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