38 lines · c
1// RUN: %clang_cc1 -fsyntax-only -verify %s2#if !__has_attribute(warning)3#warning "warning attribute missing"4#endif5 6__attribute__((warning("don't call me!"))) int good0(void);7 8__attribute__((warning)) // expected-error {{'warning' attribute takes one argument}}9int10bad0(void);11 12int bad1(__attribute__((warning("bad1"))) int param); // expected-error {{'warning' attribute only applies to functions}}13 14int bad2(void) {15 __attribute__((warning("bad2"))); // expected-error {{'warning' attribute cannot be applied to a statement}}16}17 18__attribute__((warning(3))) // expected-error {{expected string literal as argument of 'warning' attribute}}19int20bad3(void);21 22__attribute__((warning("foo"), warning("foo"))) int good1(void);23__attribute__((warning("foo"))) int good1(void);24__attribute__((warning("foo"))) int good1(void) {}25 26__attribute__((warning("foo"), error("foo"))) // expected-error {{'error' and 'warning' attributes are not compatible}}27int28bad4(void);29// expected-note@-3 {{conflicting attribute is here}}30 31/*32 * Note: we differ from GCC here; rather than support redeclarations that add33 * or remove this fn attr, we diagnose such differences.34 */35 36void foo(void); // expected-note {{previous declaration is here}}37__attribute__((warning("oh no foo"))) void foo(void); // expected-error {{'warning' attribute does not appear on the first declaration}}38