1 /* $NetBSD: msg_034.c,v 1.6 2022/06/17 18:54:53 rillig Exp $ */ 2 # 3 "msg_034.c" 3 4 // Test for message: nonportable bit-field type '%s' [34] 5 6 /* No -g since GCC allows all integer types as bit-fields. */ 7 /* lint1-flags: -S -p -w */ 8 9 /* 10 * C90 3.5.2.1 allows 'int', 'signed int', 'unsigned int' as bit-field types. 11 * 12 * C99 6.7.2.1 significantly changed the wording of the allowable types for 13 * bit-fields. For example, 6.7.2.1p4 does not mention plain 'int' at all. 14 * The rationale for C99 6.7.2.1 mentions plain int though, and it would have 15 * broken a lot of existing code to disallow plain 'int' as a bit-field type. 16 * Footnote 104 explicitly mentions plain 'int' as well and it even allows 17 * typedef-types for bit-fields. 18 */ 19 struct example { 20 /* expect+1: warning: nonportable bit-field type 'unsigned short' [34] */ 21 unsigned short ushort: 1; 22 23 /* expect+1: warning: bit-field of type plain 'int' has implementation-defined signedness [344] */ 24 int plain_int: 1; 25 26 signed int signed_int: 1; 27 unsigned int portable: 1; 28 }; 29