lib/unused-parameter.h

   1 /* A C macro for declaring that specific function parameters are not used.
   2    Copyright (C) 2008-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify it
   5    under the terms of the GNU Lesser General Public License as published
   6    by the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* _GL_UNUSED_PARAMETER is a marker that can be prepended to function parameter
  18    declarations for parameters that are not used.  This helps to reduce
  19    warnings, such as from GCC -Wunused-parameter.  The syntax is as follows:
  20        _GL_UNUSED_PARAMETER type param
  21    or more generally
  22        _GL_UNUSED_PARAMETER param_decl
  23    For example:
  24        _GL_UNUSED_PARAMETER int param
  25        _GL_UNUSED_PARAMETER int *(*param) (void)
  26  */
  27 #ifndef _GL_UNUSED_PARAMETER
  28 # define _GL_UNUSED_PARAMETER _GL_ATTRIBUTE_MAYBE_UNUSED
  29 #endif