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Diff for /embedaddon/libiconv/srclib/verify.h between versions 1.1.1.1 and 1.1.1.2

version 1.1.1.1, 2012/05/29 09:29:43 version 1.1.1.2, 2021/03/17 13:38:46
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 /* Compile-time assert-like macros.  /* Compile-time assert-like macros.
   
   Copyright (C) 2005-2006, 2009-2011 Free Software Foundation, Inc.   Copyright (C) 2005-2006, 2009-2019 Free Software Foundation, Inc.
   
    This program is free software: you can redistribute it and/or modify     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     it under the terms of the GNU General Public License as published by
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    GNU General Public License for more details.     GNU General Public License for more details.
   
    You should have received a copy of the GNU General Public License     You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
   
 /* Written by Paul Eggert, Bruno Haible, and Jim Meyering.  */  /* Written by Paul Eggert, Bruno Haible, and Jim Meyering.  */
   
 #ifndef _GL_VERIFY_H  #ifndef _GL_VERIFY_H
# define _GL_VERIFY_H#define _GL_VERIFY_H
   
   
/* Define _GL_HAVE__STATIC_ASSERT to 1 if _Static_assert works as per the/* Define _GL_HAVE__STATIC_ASSERT to 1 if _Static_assert works as per C11.
   C1X draft N1548 section 6.7.10.  This is supported by GCC 4.6.0 and   This is supported by GCC 4.6.0 and later, in C mode, and its use
   later, in C mode, and its use here generates easier-to-read diagnostics   here generates easier-to-read diagnostics when verify (R) fails.
   when verify (R) fails. 
   
   Define _GL_HAVE_STATIC_ASSERT to 1 if static_assert works as per the   Define _GL_HAVE_STATIC_ASSERT to 1 if static_assert works as per C++11.
   C++0X draft N3242 section 7.(4).   This is supported by GCC 6.1.0 and later, in C++ mode.
   This will likely be supported by future GCC versions, in C++ mode. 
   
    Use this only with GCC.  If we were willing to slow 'configure'     Use this only with GCC.  If we were willing to slow 'configure'
    down we could also use it with other compilers, but since this     down we could also use it with other compilers, but since this
    affects only the quality of diagnostics, why bother?  */     affects only the quality of diagnostics, why bother?  */
# if (4 < __GNUC__ || (__GNUC__ == 4 && 6 <= __GNUC_MINOR__)) && !defined __cplusplus#if (4 < __GNUC__ + (6 <= __GNUC_MINOR__) \
#  define _GL_HAVE__STATIC_ASSERT 1     && (201112L <= __STDC_VERSION__  || !defined __STRICT_ANSI__) \
# endif     && !defined __cplusplus)
/* The condition (99 < __GNUC__) is temporary, until we know about the# define _GL_HAVE__STATIC_ASSERT 1
   first G++ release that supports static_assert.  */#endif
# if (99 < __GNUC__) && defined __cplusplus#if (6 <= __GNUC__) && defined __cplusplus
#  define _GL_HAVE_STATIC_ASSERT 1# define _GL_HAVE_STATIC_ASSERT 1
# endif#endif
   
   /* FreeBSD 9.1 <sys/cdefs.h>, included by <stddef.h> and lots of other
      system headers, defines a conflicting _Static_assert that is no
      better than ours; override it.  */
   #ifndef _GL_HAVE_STATIC_ASSERT
   # include <stddef.h>
   # undef _Static_assert
   #endif
   
 /* Each of these macros verifies that its argument R is nonzero.  To  /* Each of these macros verifies that its argument R is nonzero.  To
    be portable, R should be an integer constant expression.  Unlike     be portable, R should be an integer constant expression.  Unlike
    assert (R), there is no run-time overhead.     assert (R), there is no run-time overhead.
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        extern int (*dummy (void)) [sizeof (struct {...})];         extern int (*dummy (void)) [sizeof (struct {...})];
   
    * GCC warns about duplicate declarations of the dummy function if     * GCC warns about duplicate declarations of the dummy function if
     -Wredundant_decls is used.  GCC 4.3 and later have a builtin     -Wredundant-decls is used.  GCC 4.3 and later have a builtin
      __COUNTER__ macro that can let us generate unique identifiers for       __COUNTER__ macro that can let us generate unique identifiers for
      each dummy function, to suppress this warning.       each dummy function, to suppress this warning.
   
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      which do not support _Static_assert, also do not warn about the       which do not support _Static_assert, also do not warn about the
      last declaration mentioned above.       last declaration mentioned above.
   
      * GCC warns if -Wnested-externs is enabled and verify() is used
        within a function body; but inside a function, you can always
        arrange to use verify_expr() instead.
   
    * In C++, any struct definition inside sizeof is invalid.     * In C++, any struct definition inside sizeof is invalid.
      Use a template type to work around the problem.  */       Use a template type to work around the problem.  */
   
 /* Concatenate two preprocessor tokens.  */  /* Concatenate two preprocessor tokens.  */
# define _GL_CONCAT(x, y) _GL_CONCAT0 (x, y)#define _GL_CONCAT(x, y) _GL_CONCAT0 (x, y)
# define _GL_CONCAT0(x, y) x##y#define _GL_CONCAT0(x, y) x##y
   
 /* _GL_COUNTER is an integer, preferably one that changes each time we  /* _GL_COUNTER is an integer, preferably one that changes each time we
    use it.  Use __COUNTER__ if it works, falling back on __LINE__     use it.  Use __COUNTER__ if it works, falling back on __LINE__
    otherwise.  __LINE__ isn't perfect, but it's better than a     otherwise.  __LINE__ isn't perfect, but it's better than a
    constant.  */     constant.  */
# if defined __COUNTER__ && __COUNTER__ != __COUNTER__#if defined __COUNTER__ && __COUNTER__ != __COUNTER__
#  define _GL_COUNTER __COUNTER__# define _GL_COUNTER __COUNTER__
# else#else
#  define _GL_COUNTER __LINE__# define _GL_COUNTER __LINE__
# endif#endif
   
 /* Generate a symbol with the given prefix, making it unique if  /* Generate a symbol with the given prefix, making it unique if
    possible.  */     possible.  */
# define _GL_GENSYM(prefix) _GL_CONCAT (prefix, _GL_COUNTER)#define _GL_GENSYM(prefix) _GL_CONCAT (prefix, _GL_COUNTER)
   
 /* Verify requirement R at compile-time, as an integer constant expression  /* Verify requirement R at compile-time, as an integer constant expression
    that returns 1.  If R is false, fail at compile-time, preferably     that returns 1.  If R is false, fail at compile-time, preferably
    with a diagnostic that includes the string-literal DIAGNOSTIC.  */     with a diagnostic that includes the string-literal DIAGNOSTIC.  */
   
# define _GL_VERIFY_TRUE(R, DIAGNOSTIC) \#define _GL_VERIFY_TRUE(R, DIAGNOSTIC) \
    (!!sizeof (_GL_VERIFY_TYPE (R, DIAGNOSTIC)))   (!!sizeof (_GL_VERIFY_TYPE (R, DIAGNOSTIC)))
   
# ifdef __cplusplus#ifdef __cplusplus
#  if !GNULIB_defined_struct__gl_verify_type# if !GNULIB_defined_struct__gl_verify_type
 template <int w>  template <int w>
   struct _gl_verify_type {    struct _gl_verify_type {
     unsigned int _gl_verify_error_if_negative: w;      unsigned int _gl_verify_error_if_negative: w;
   };    };
#   define GNULIB_defined_struct__gl_verify_type 1#  define GNULIB_defined_struct__gl_verify_type 1
#  endif 
#  define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \ 
    _gl_verify_type<(R) ? 1 : -1> 
# elif defined _GL_HAVE__STATIC_ASSERT 
#  define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \ 
     struct {                                   \ 
       _Static_assert (R, DIAGNOSTIC);          \ 
       int _gl_dummy;                          \ 
     } 
# else 
#  define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \ 
     struct { unsigned int _gl_verify_error_if_negative: (R) ? 1 : -1; } 
 # endif  # endif
   # define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
       _gl_verify_type<(R) ? 1 : -1>
   #elif defined _GL_HAVE__STATIC_ASSERT
   # define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
       struct {                                   \
         _Static_assert (R, DIAGNOSTIC);          \
         int _gl_dummy;                          \
       }
   #else
   # define _GL_VERIFY_TYPE(R, DIAGNOSTIC) \
       struct { unsigned int _gl_verify_error_if_negative: (R) ? 1 : -1; }
   #endif
   
 /* Verify requirement R at compile-time, as a declaration without a  /* Verify requirement R at compile-time, as a declaration without a
    trailing ';'.  If R is false, fail at compile-time, preferably     trailing ';'.  If R is false, fail at compile-time, preferably
    with a diagnostic that includes the string-literal DIAGNOSTIC.     with a diagnostic that includes the string-literal DIAGNOSTIC.
   
   Unfortunately, unlike C1X, this implementation must appear as an   Unfortunately, unlike C11, this implementation must appear as an
    ordinary declaration, and cannot appear inside struct { ... }.  */     ordinary declaration, and cannot appear inside struct { ... }.  */
   
# ifdef _GL_HAVE__STATIC_ASSERT#ifdef _GL_HAVE__STATIC_ASSERT
#  define _GL_VERIFY _Static_assert# define _GL_VERIFY _Static_assert
# else#else
#  define _GL_VERIFY(R, DIAGNOSTIC)                                       \# define _GL_VERIFY(R, DIAGNOSTIC)                                       \
     extern int (*_GL_GENSYM (_gl_verify_function) (void))             \    extern int (*_GL_GENSYM (_gl_verify_function) (void))              \
       [_GL_VERIFY_TRUE (R, DIAGNOSTIC)]      [_GL_VERIFY_TRUE (R, DIAGNOSTIC)]
# endif#endif
   
 /* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h.  */  /* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h.  */
# ifdef _GL_STATIC_ASSERT_H#ifdef _GL_STATIC_ASSERT_H
#  if !defined _GL_HAVE__STATIC_ASSERT && !defined _Static_assert# if !defined _GL_HAVE__STATIC_ASSERT && !defined _Static_assert
#   define _Static_assert(R, DIAGNOSTIC) _GL_VERIFY (R, DIAGNOSTIC)#  define _Static_assert(R, DIAGNOSTIC) _GL_VERIFY (R, DIAGNOSTIC)
#  endif 
#  if !defined _GL_HAVE_STATIC_ASSERT && !defined static_assert 
#   define static_assert _Static_assert /* Draft C1X requires this #define.  */ 
#  endif 
 # endif  # endif
   # if !defined _GL_HAVE_STATIC_ASSERT && !defined static_assert
   #  define static_assert _Static_assert /* C11 requires this #define.  */
   # endif
   #endif
   
 /* @assert.h omit start@  */  /* @assert.h omit start@  */
   
Line 225  template <int w> Line 235  template <int w>
   
    verify_true is obsolescent; please use verify_expr instead.  */     verify_true is obsolescent; please use verify_expr instead.  */
   
# define verify_true(R) _GL_VERIFY_TRUE (R, "verify_true (" #R ")")#define verify_true(R) _GL_VERIFY_TRUE (R, "verify_true (" #R ")")
   
 /* Verify requirement R at compile-time.  Return the value of the  /* Verify requirement R at compile-time.  Return the value of the
    expression E.  */     expression E.  */
   
# define verify_expr(R, E) \#define verify_expr(R, E) \
    (_GL_VERIFY_TRUE (R, "verify_expr (" #R ", " #E ")") ? (E) : (E))   (_GL_VERIFY_TRUE (R, "verify_expr (" #R ", " #E ")") ? (E) : (E))
   
 /* Verify requirement R at compile-time, as a declaration without a  /* Verify requirement R at compile-time, as a declaration without a
    trailing ';'.  */     trailing ';'.  */
   
   #ifdef __GNUC__
 # define verify(R) _GL_VERIFY (R, "verify (" #R ")")  # define verify(R) _GL_VERIFY (R, "verify (" #R ")")
   #else
   /* PGI barfs if R is long.  Play it safe.  */
   # define verify(R) _GL_VERIFY (R, "verify (...)")
   #endif
   
   #ifndef __has_builtin
   # define __has_builtin(x) 0
   #endif
   
   /* Assume that R always holds.  This lets the compiler optimize
      accordingly.  R should not have side-effects; it may or may not be
      evaluated.  Behavior is undefined if R is false.  */
   
   #if (__has_builtin (__builtin_unreachable) \
        || 4 < __GNUC__ + (5 <= __GNUC_MINOR__))
   # define assume(R) ((R) ? (void) 0 : __builtin_unreachable ())
   #elif 1200 <= _MSC_VER
   # define assume(R) __assume (R)
   #elif ((defined GCC_LINT || defined lint) \
          && (__has_builtin (__builtin_trap) \
              || 3 < __GNUC__ + (3 < __GNUC_MINOR__ + (4 <= __GNUC_PATCHLEVEL__))))
     /* Doing it this way helps various packages when configured with
        --enable-gcc-warnings, which compiles with -Dlint.  It's nicer
        when 'assume' silences warnings even with older GCCs.  */
   # define assume(R) ((R) ? (void) 0 : __builtin_trap ())
   #else
     /* Some tools grok NOTREACHED, e.g., Oracle Studio 12.6.  */
   # define assume(R) ((R) ? (void) 0 : /*NOTREACHED*/ (void) 0)
   #endif
   
 /* @assert.h omit end@  */  /* @assert.h omit end@  */
   
Removed from v.1.1.1.1  
changed lines
  Added in v.1.1.1.2

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