gl/tests/test-stdbool.c

   1 /* Test of <stdbool.h> substitute.
   2    Copyright (C) 2002-2007, 2009-2010 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include <stdbool.h>
  22
  23 #ifndef bool
  24  "error: bool is not defined"
  25 #endif
  26 #ifndef false
  27  "error: false is not defined"
  28 #endif
  29 #if false
  30  "error: false is not 0"
  31 #endif
  32 #ifndef true
  33  "error: true is not defined"
  34 #endif
  35 #if true != 1
  36  "error: true is not 1"
  37 #endif
  38 #ifndef __bool_true_false_are_defined
  39  "error: __bool_true_false_are_defined is not defined"
  40 #endif
  41
  42 #if 0 /* Cannot be guaranteed with gnulib's <stdbool.h>.  */
  43 struct s { _Bool s: 1; _Bool t; } s;
  44 #endif
  45
  46 char a[true == 1 ? 1 : -1];
  47 char b[false == 0 ? 1 : -1];
  48 char c[__bool_true_false_are_defined == 1 ? 1 : -1];
  49 #if 0 /* Cannot be guaranteed with gnulib's <stdbool.h>, at least,
  50 not for all compilers.  */
  51 char d[(bool) 0.5 == true ? 1 : -1];
  52 bool e = &s;
  53 char f[(_Bool) 0.0 == false ? 1 : -1];
  54 #endif
  55 char g[true];
  56 char h[sizeof (_Bool)];
  57 #if 0 /* See above.  */
  58 char i[sizeof s.t];
  59 #endif
  60 enum { j = false, k = true, l = false * true, m = true * 256 };
  61 _Bool n[m];
  62 char o[sizeof n == m * sizeof n[0] ? 1 : -1];
  63 char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
  64 #if 0 /* Cannot be guaranteed with gnulib's <stdbool.h>.  */
  65 #if defined __xlc__ || defined __GNUC__
  66  /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0
  67     reported by James Lemley on 2005-10-05; see
  68     http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
  69     This test is not quite right, since xlc is allowed to
  70     reject this program, as the initializer for xlcbug is
  71     not one of the forms that C requires support for.
  72     However, doing the test right would require a run-time
  73     test, and that would make cross-compilation harder.
  74     Let us hope that IBM fixes the xlc bug, and also adds
  75     support for this kind of constant expression.  In the
  76     meantime, this test will reject xlc, which is OK, since
  77     our stdbool.h substitute should suffice.  We also test
  78     this with GCC, where it should work, to detect more
  79     quickly whether someone messes up the test in the
  80     future.  */
  81  char digs[] = "0123456789";
  82  int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1);
  83 #endif
  84 #endif
  85 /* Catch a bug in an HP-UX C compiler.  See
  86    http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
  87    http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
  88  */
  89 _Bool q = true;
  90 _Bool *pq = &q;
  91
  92 int
  93 main ()
  94 {
  95   return 0;
  96 }