1 // RUN: %clang_cc1 -verify %s 2 3 /* WG14 N1356: Yes 4 * _Bool bit-fields 5 */ 6 7 // C does not allow the bit-width of a bit-field to exceed the width of the 8 // bit-field type, and _Bool is only required to be able to store 0 and 1 9 // (and thus is implicitly unsigned), which only requires a single bit. 10 #if __BOOL_WIDTH__ < __CHAR_BIT__ 11 struct S { 12 _Bool b : __CHAR_BIT__; // expected-error {{width of bit-field 'b' (8 bits) exceeds the width of its type (1 bit)}} 13 }; 14 #else 15 // expected-no-diagnostics 16 #endif 17 18