1 /* $NetBSD: msg_344.c,v 1.2 2022/06/17 18:54:53 rillig Exp $ */ 2 # 3 "msg_344.c" 3 4 // Test for message: bit-field of type plain 'int' has implementation-defined signedness [344] 5 6 /* lint1-extra-flags: -p */ 7 8 /* 9 * C90 3.5.2.1 allows 'int', 'signed int', 'unsigned int' as bit-field types. 10 * 11 * C99 6.7.2.1 significantly changed the wording of the allowable types for 12 * bit-fields. For example, 6.7.2.1p4 does not mention plain 'int' at all. 13 * The rationale for C99 6.7.2.1 mentions plain 'int' though, and it would 14 * have broken a lot of existing code to disallow plain 'int' as a bit-field 15 * type. Footnote 104 explicitly mentions plain 'int' as well and it even 16 * allows typedef-types for bit-fields. 17 */ 18 struct example { 19 /* expect+1: warning: bit-field of type plain 'int' has implementation-defined signedness [344] */ 20 int plain_int: 1; 21 22 signed int signed_int: 1; 23 unsigned int unsigned_int: 1; 24 }; 25