| /* Test of <stdbool.h> substitute. |
| Copyright (C) 2002-2007, 2009-2021 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ |
| |
| /* Define ADDRESS_CHECK_OKAY if it is OK to assign an address to a 'bool' |
| and this does not generate a warning (because we want this test to succeed |
| even when using gcc's -Werror). */ |
| #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) \ |
| || (__clang_major__ >= 4) |
| /* We can silence the warning. */ |
| # pragma GCC diagnostic ignored "-Waddress" |
| # define ADDRESS_CHECK_OKAY |
| #elif defined __GNUC__ || defined __clang__ |
| /* There may be a warning. */ |
| #else |
| /* Ignore warnings from other compilers. */ |
| # define ADDRESS_CHECK_OKAY |
| #endif |
| |
| #include <config.h> |
| |
| #include <stdbool.h> |
| |
| #ifndef bool |
| "error: bool is not defined" |
| #endif |
| #ifndef false |
| "error: false is not defined" |
| #endif |
| #if false |
| "error: false is not 0" |
| #endif |
| #ifndef true |
| "error: true is not defined" |
| #endif |
| #if true != 1 |
| "error: true is not 1" |
| #endif |
| #ifndef __bool_true_false_are_defined |
| "error: __bool_true_false_are_defined is not defined" |
| #endif |
| |
| /* Several tests cannot be guaranteed with gnulib's <stdbool.h>, at |
| least, not for all compilers and compiler options. */ |
| #if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ |
| struct s { _Bool s: 1; _Bool t; } s; |
| #endif |
| |
| char a[true == 1 ? 1 : -1]; |
| char b[false == 0 ? 1 : -1]; |
| char c[__bool_true_false_are_defined == 1 ? 1 : -1]; |
| #if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above. */ |
| char d[(bool) 0.5 == true ? 1 : -1]; |
| # ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */ |
| /* C99 may plausibly be interpreted as not requiring support for a cast from |
| a variable's address to bool in a static initializer. So treat it like a |
| GCC extension. */ |
| # if defined __GNUC__ || defined __clang__ |
| bool e = &s; |
| # endif |
| # endif |
| char f[(_Bool) 0.0 == false ? 1 : -1]; |
| #endif |
| char g[true]; |
| char h[sizeof (_Bool)]; |
| #if HAVE_STDBOOL_H || 3 <= __GNUC__ || 4 <= __clang_major__ /* See above. */ |
| char i[sizeof s.t]; |
| #endif |
| enum { j = false, k = true, l = false * true, m = true * 256 }; |
| _Bool n[m]; |
| char o[sizeof n == m * sizeof n[0] ? 1 : -1]; |
| char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; |
| /* Catch a bug in an HP-UX C compiler. See |
| https://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html |
| https://lists.gnu.org/r/bug-coreutils/2005-11/msg00161.html |
| */ |
| _Bool q = true; |
| _Bool *pq = &q; |
| |
| int |
| main () |
| { |
| int error = 0; |
| |
| #if HAVE_STDBOOL_H || 3 <= __GNUC_ || 4 <= __clang_major___ /* See above. */ |
| # ifdef ADDRESS_CHECK_OKAY /* Avoid gcc warning. */ |
| /* A cast from a variable's address to bool is valid in expressions. */ |
| { |
| bool e1 = &s; |
| if (!e1) |
| error = 1; |
| } |
| # endif |
| #endif |
| |
| /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 |
| reported by James Lemley on 2005-10-05; see |
| https://lists.gnu.org/r/bug-coreutils/2005-10/msg00086.html |
| This is a runtime test, since a corresponding compile-time |
| test would rely on initializer extensions. */ |
| { |
| char digs[] = "0123456789"; |
| if (&(digs + 5)[-2 + (bool) 1] != &digs[4]) |
| error = 1; |
| } |
| |
| return error; |
| } |