clang/test/C/drs/dr491.c

   1 /* RUN: %clang_cc1 -std=c89 -verify -Wreserved-macro-identifier %s
   2    RUN: %clang_cc1 -std=c99 -verify -Wreserved-macro-identifier %s
   3    RUN: %clang_cc1 -std=c11 -verify -Wreserved-macro-identifier %s
   4    RUN: %clang_cc1 -std=c17 -verify -Wreserved-macro-identifier %s
   5    RUN: %clang_cc1 -std=c2x -verify -Wreserved-macro-identifier %s
   6  */
   7
   8 /* WG14 DR491: partial
   9  * Concern with Keywords that Match Reserved Identifiers
  10  *
  11  * Claiming this as partial because we do not reject code using a reserved
  12  * identifier, but our reserved identifier code incorrectly identifies some
  13  * keywords as reserved identifiers for macro names, but not others.
  14  */
  15
  16 #define const const
  17 #define int int
  18 #define restrict restrict
  19
  20 /* FIXME: none of these should diagnose the macro name as a reserved
  21  * identifier per C2x 6.4.2p7 (similar wording existed in earlier standard
  22  * versions).
  23  */
  24 #define _Static_assert _Static_assert  /* expected-warning {{macro name is a reserved identifier}} */
  25 #define _Alignof(x) _Alignof(x)        /* expected-warning {{macro name is a reserved identifier}} */
  26 #define _Bool _Bool                    /* expected-warning {{macro name is a reserved identifier}} */
  27 #define __has_c_attribute __has_c_attribute /* expected-warning {{macro name is a reserved identifier}}
  28                                                expected-warning {{redefining builtin macro}}
  29                                              */
  30 #define __restrict__ __restrict__      /* expected-warning {{macro name is a reserved identifier}} */