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[libcxx] Enable noexcept for GCC 4.6 and greater 

Summary:
This patch allows GCC 4.6 and above to use `noexcept` as opposed to `throw()`. 

Is it an ABI safe change to suddenly switch on `noexcept`? I imagine it must be because it's disabled in w/ clang in C++03 but not C++11.


Reviewers: danalbert, jroelofs, mclow.lists

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D15516

llvm-svn: 255683
This commit is contained in:
Eric Fiselier 2015-12-15 22:16:47 +00:00
parent 3ecc84afb3
commit 8dcfcf79ab
1 changed files with 15 additions and 19 deletions
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34
libcxx/include/__config
View File

@ -401,14 +401,8 @@ typedef __char32_t char32_t;
#endif // __linux__
#endif
#if (__has_feature(cxx_noexcept))
# define _NOEXCEPT noexcept
# define _NOEXCEPT_(x) noexcept(x)
# define _NOEXCEPT_OR_FALSE(x) noexcept(x)
#else
# define _NOEXCEPT throw()
# define _NOEXCEPT_(x)
# define _NOEXCEPT_OR_FALSE(x) false
#if !(__has_feature(cxx_noexcept))
#define _LIBCPP_HAS_NO_NOEXCEPT
#endif
#if __has_feature(underlying_type)
@ -476,10 +470,6 @@ namespace std {
#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
#endif
#define _NOEXCEPT throw()
#define _NOEXCEPT_(x)
#define _NOEXCEPT_OR_FALSE(x) false
#ifndef __GXX_EXPERIMENTAL_CXX0X__
#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
@ -493,6 +483,7 @@ namespace std {
#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
#define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS
#define _LIBCPP_HAS_NO_STRONG_ENUMS
#define _LIBCPP_HAS_NO_NOEXCEPT
#else // __GXX_EXPERIMENTAL_CXX0X__
@ -516,6 +507,7 @@ namespace std {
#endif // _GNUC_VER < 404
#if _GNUC_VER < 406
#define _LIBCPP_HAS_NO_NOEXCEPT
#define _LIBCPP_HAS_NO_NULLPTR
#endif
@ -549,15 +541,14 @@ using namespace _LIBCPP_NAMESPACE __attribute__((__strong__));
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
#define _LIBCPP_HAS_NO_NOEXCEPT
#define __alignof__ __alignof
#define _LIBCPP_NORETURN __declspec(noreturn)
#define _LIBCPP_UNUSED
#define _ALIGNAS(x) __declspec(align(x))
#define _LIBCPP_HAS_NO_VARIADICS
#define _NOEXCEPT throw ()
#define _NOEXCEPT_(x)
#define _NOEXCEPT_OR_FALSE(x) false
#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {
#define _LIBCPP_END_NAMESPACE_STD }
@ -577,14 +568,11 @@ namespace std {
#define _LIBCPP_NORETURN __attribute__((noreturn))
#define _LIBCPP_UNUSED
#define _NOEXCEPT throw()
#define _NOEXCEPT_(x)
#define _NOEXCEPT_OR_FALSE(x) false
#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
#define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS
#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
#define _LIBCPP_HAS_NO_NOEXCEPT
#define _LIBCPP_HAS_NO_NULLPTR
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#define _LIBCPP_HAS_IS_BASE_OF
@ -608,6 +596,14 @@ namespace std {
#endif // __clang__ || __GNUC__ || _MSC_VER || __IBMCPP__
#ifndef _LIBCPP_HAS_NO_NOEXCEPT
# define _NOEXCEPT noexcept
# define _NOEXCEPT_(x) noexcept(x)
#else
# define _NOEXCEPT throw()
# define _NOEXCEPT_(x)
#endif
#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
typedef unsigned short char16_t;
typedef unsigned int char32_t;