1// RUN: %clang_cc1 -fsyntax-only %s -verify 2#ifndef __has_warning 3#error Should have __has_warning 4#endif 5 6#if __has_warning("not valid") // expected-warning {{__has_warning expected option name}} 7#endif 8 9// expected-warning@+2 {{Should have -Wparentheses}} 10#if __has_warning("-Wparentheses") 11#warning Should have -Wparentheses 12#endif 13 14#if __has_warning(-Wfoo) // expected-error {{builtin warning check macro requires a parenthesized string}} 15#endif 16 17// expected-warning@+3 {{Not a valid warning flag}} 18#if __has_warning("-Wnot-a-valid-warning-flag-at-all") 19#else 20#warning Not a valid warning flag 21#endif 22