bits/iscanonical.h

   1 /* Define iscanonical macro.
   2    Copyright (C) 2016-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _MATH_H
  20 # error "Never use <bits/iscanonical.h> directly; include <math.h> instead."
  21 #endif
  22
  23 /* Return nonzero value if X is canonical.  By default, we only have
  24    IEEE interchange binary formats, in which all values are canonical,
  25    but the argument must still be converted to its semantic type for
  26    any exceptions arising from the conversion, before being
  27    discarded.  */
  28 #define iscanonical(x) ((void) (__typeof (x)) (x), 1)