-/* Copyright (C) 1991,92,94,95,96,97,98,99,2000 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
/*
- * ISO C
Standard: 4.2 DIAGNOSTICS <assert.h>
+ * ISO C
99 Standard: 7.2 Diagnostics <assert.h>
*/
#ifdef _ASSERT_H
# undef _ASSERT_H
# undef assert
+# undef __ASSERT_VOID_CAST
# ifdef __USE_GNU
# undef assert_perror
#define _ASSERT_H 1
#include <features.h>
+#if defined __cplusplus && __GNUC_PREREQ (2,95)
+# define __ASSERT_VOID_CAST static_cast<void>
+#else
+# define __ASSERT_VOID_CAST (void)
+#endif
+
/* void assert (int expression);
If NDEBUG is defined, do nothing.
#ifdef NDEBUG
-# define assert(expr) ((void) 0)
+# define assert(expr) (__ASSERT_VOID_CAST (0))
/* void assert_perror (int errnum);
(This is a GNU extension.) */
# ifdef __USE_GNU
-# define assert_perror(errnum) ((void) 0)
+# define assert_perror(errnum) (__ASSERT_VOID_CAST (0))
# endif
#else /* Not NDEBUG. */
__BEGIN_DECLS
/* This prints an "Assertion failed" message and aborts. */
-extern void __assert_fail (__const char *__assertion, __const char *__file,
- unsigned int __line, __const char *__function)
+extern void __assert_fail (const char *__assertion, const char *__file,
+ unsigned int __line, const char *__function)
__THROW __attribute__ ((__noreturn__));
/* Likewise, but prints the error text for ERRNUM. */
-extern void __assert_perror_fail (int __errnum, __const char *__file,
- unsigned int __line,
- __const char *__function)
+extern void __assert_perror_fail (int __errnum, const char *__file,
+ unsigned int __line, const char *__function)
__THROW __attribute__ ((__noreturn__));
__END_DECLS
-# define assert(expr) \
- ((void) ((expr) ? 0 : \
- (__assert_fail (__STRING(expr), \
- __FILE__, __LINE__, __ASSERT_FUNCTION), 0)))
+/* When possible, define assert so that it does not add extra
+ parentheses around EXPR. Otherwise, those added parentheses would
+ suppress warnings we'd expect to be detected by gcc's -Wparentheses. */
+# if defined __cplusplus
+# define assert(expr) \
+ (static_cast <bool> (expr) \
+ ? void (0) \
+ : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))
+# elif !defined __GNUC__ || defined __STRICT_ANSI__
+# define assert(expr) \
+ ((expr) \
+ ? __ASSERT_VOID_CAST (0) \
+ : __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION))
+# else
+/* The first occurrence of EXPR is not evaluated due to the sizeof,
+ but will trigger any pedantic warnings masked by the __extension__
+ for the second occurrence. The ternary operator is required to
+ support function pointers and bit fields in this context, and to
+ suppress the evaluation of variable length arrays. */
+# define assert(expr) \
+ ((void) sizeof ((expr) ? 1 : 0), __extension__ ({ \
+ if (expr) \
+ ; /* empty */ \
+ else \
+ __assert_fail (#expr, __FILE__, __LINE__, __ASSERT_FUNCTION); \
+ }))
+# endif
# ifdef __USE_GNU
-# define assert_perror(errnum) \
- ((void) (!(errnum) ? 0 : (__assert_perror_fail ((errnum), \
- __FILE__, __LINE__, \
- __ASSERT_FUNCTION), 0)))
+# define assert_perror(errnum) \
+ (!(errnum) \
+ ? __ASSERT_VOID_CAST (0) \
+ : __assert_perror_fail ((errnum), __FILE__, __LINE__, __ASSERT_FUNCTION))
# endif
/* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
C9x has a similar variable called __func__, but prefer the GCC one since
it demangles C++ function names. */
# if defined __cplusplus ? __GNUC_PREREQ (2, 6) : __GNUC_PREREQ (2, 4)
-# define __ASSERT_FUNCTION __PRETTY_FUNCTION__
+# define __ASSERT_FUNCTION __extension__ __PRETTY_FUNCTION__
# else
# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
# define __ASSERT_FUNCTION __func__
# else
-# define __ASSERT_FUNCTION ((__const char *) 0)
+# define __ASSERT_FUNCTION ((const char *) 0)
# endif
# endif
#endif /* NDEBUG. */
+
+
+#if defined __USE_ISOC11 && !defined __cplusplus
+# undef static_assert
+# define static_assert _Static_assert
+#endif
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