src/arg_unused.h

   1 /* $Id: arg_unused.h,v 1.1 2000/01/07 06:33:43 tell Exp $
   2  * (C) 1999, Greg J. Badros
   3  */
   4
   5 #ifndef ARG_UNUSED_H__
   6 #define ARG_UNUSED_H__
   7
   8
   9 /* Can mark unused formals as ARG_IGNORE or ARG_UNUSED and avoid warning;
  10    uses a gcc feature, but C++ also can do this by just
  11    not giving a formal name.
  12    ARG_IGNORE is for arguments that really won't be used.
  13    whereas ARG_UNUSED just comments that the argument is not used at present
  14      and might be worth revisiting to see if we can generalize the code
  15      to use it. (Or if alternate implementations might use the variable) */
  16 #ifdef __GNUC__
  17 /* do not use the variable name as given-- paste an
  18    "_unused" on to the end so we force an error if
  19    it is used. */
  20 #define ARG_IGNORE(x) x ## _ignore __attribute__ ((unused))
  21 #define ARG_UNUSED(x) x ## _unused __attribute__ ((unused))
  22 #elif defined(__cplusplus)
  23 #define ARG_IGNORE(x) /* empty */
  24 #define ARG_UNUSED(x) /* empty */
  25 #else
  26 #define ARG_IGNORE(x) x ## _ignore
  27 #define ARG_UNUSED(x) x ## _unused
  28 #endif
  29
  30
  31 #endif