diff options
Diffstat (limited to 'lib/verify.h')
| -rw-r--r-- | lib/verify.h | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/lib/verify.h b/lib/verify.h index d4beccad96a..f0b3fc5851b 100644 --- a/lib/verify.h +++ b/lib/verify.h @@ -37,7 +37,7 @@ && (4 < __GNUC__ + (6 <= __GNUC_MINOR__) || 5 <= __clang_major__))) # define _GL_HAVE__STATIC_ASSERT 1 # endif -# if (202000 <= __STDC_VERSION__ \ +# if (202311 <= __STDC_VERSION__ \ || (!defined __STRICT_ANSI__ && 9 <= __GNUC__)) # define _GL_HAVE__STATIC_ASSERT1 1 # endif @@ -222,10 +222,32 @@ template <int w> /* _GL_STATIC_ASSERT_H is defined if this code is copied into assert.h. */ #ifdef _GL_STATIC_ASSERT_H -# if !defined _GL_HAVE__STATIC_ASSERT1 && !defined _Static_assert -# define _Static_assert(R, ...) \ - _GL_VERIFY ((R), "static assertion failed", -) +/* Define _Static_assert if needed. */ +/* With clang ≥ 3.8.0 in C++ mode, _Static_assert already works and accepts + 1 or 2 arguments. We better don't override it, because clang's standard + C++ library uses static_assert inside classes in several places, and our + replacement via _GL_VERIFY does not work in these contexts. */ +# if (defined __cplusplus && defined __clang__ \ + && (4 <= __clang_major__ + (8 <= __clang_minor__))) +# if 5 <= __clang_major__ +/* Avoid "warning: 'static_assert' with no message is a C++17 extension". */ +# pragma clang diagnostic ignored "-Wc++17-extensions" +# else +/* Avoid "warning: static_assert with no message is a C++1z extension". */ +# pragma clang diagnostic ignored "-Wc++1z-extensions" +# endif +# elif !defined _GL_HAVE__STATIC_ASSERT1 && !defined _Static_assert +# if !defined _MSC_VER || defined __clang__ +# define _Static_assert(...) \ + _GL_VERIFY (__VA_ARGS__, "static assertion failed", -) +# else + /* Work around MSVC preprocessor incompatibility with ISO C; see + <https://stackoverflow.com/questions/5134523/>. */ +# define _Static_assert(R, ...) \ + _GL_VERIFY ((R), "static assertion failed", -) +# endif # endif +/* Define static_assert if needed. */ # if (!defined static_assert \ && __STDC_VERSION__ < 202311 \ && (!defined __cplusplus \ @@ -235,15 +257,16 @@ template <int w> /* MSVC 14 in C++ mode supports the two-arguments static_assert but not the one-argument static_assert, and it does not support _Static_assert. We have to play preprocessor tricks to distinguish the two cases. - Since the MSVC preprocessor is not ISO C compliant (cf. - <https://stackoverflow.com/questions/5134523/>), the solution is specific - to MSVC. */ + Since the MSVC preprocessor is not ISO C compliant (see above),. + the solution is specific to MSVC. */ # define _GL_EXPAND(x) x # define _GL_SA1(a1) static_assert ((a1), "static assertion failed") # define _GL_SA2 static_assert # define _GL_SA3 static_assert # define _GL_SA_PICK(x1,x2,x3,x4,...) x4 # define static_assert(...) _GL_EXPAND(_GL_SA_PICK(__VA_ARGS__,_GL_SA3,_GL_SA2,_GL_SA1)) (__VA_ARGS__) +/* Avoid "fatal error C1189: #error: The C++ Standard Library forbids macroizing keywords." */ +# define _ALLOW_KEYWORD_MACROS 1 # else # define static_assert _Static_assert /* C11 requires this #define. */ # endif @@ -252,7 +275,9 @@ template <int w> /* @assert.h omit start@ */ -#if 3 < __GNUC__ + (3 < __GNUC_MINOR__ + (4 <= __GNUC_PATCHLEVEL__)) +#if defined __clang_major__ && __clang_major__ < 5 +# define _GL_HAS_BUILTIN_TRAP 0 +#elif 3 < __GNUC__ + (3 < __GNUC_MINOR__ + (4 <= __GNUC_PATCHLEVEL__)) # define _GL_HAS_BUILTIN_TRAP 1 #elif defined __has_builtin # define _GL_HAS_BUILTIN_TRAP __has_builtin (__builtin_trap) @@ -260,7 +285,9 @@ template <int w> # define _GL_HAS_BUILTIN_TRAP 0 #endif -#if 4 < __GNUC__ + (5 <= __GNUC_MINOR__) +#if defined __clang_major__ && __clang_major__ < 5 +# define _GL_HAS_BUILTIN_UNREACHABLE 0 +#elif 4 < __GNUC__ + (5 <= __GNUC_MINOR__) # define _GL_HAS_BUILTIN_UNREACHABLE 1 #elif defined __has_builtin # define _GL_HAS_BUILTIN_UNREACHABLE __has_builtin (__builtin_unreachable) |