generic-library/cxx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Factor definition of std::nullptr_t out of <cstddef> into a header that can also be used by <stddef.h>.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@249737 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Smith
2015-10-08 20:34:11 +00:00
parent d20ca91968
commit 72d7577b34
2 changed files with 67 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
include/cstddef
View File

@@ -34,6 +34,7 @@ Types:
*/
#include <__config>
#include <__nullptr>
#include <stddef.h>
@@ -53,50 +54,6 @@ using ::max_align_t;
typedef long double max_align_t;
#endif
#ifdef _LIBCPP_HAS_NO_NULLPTR
struct _LIBCPP_TYPE_VIS_ONLY nullptr_t
{
void* __lx;
struct __nat {int __for_bool_;};
_LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t() : __lx(0) {}
_LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t(int __nat::*) : __lx(0) {}
_LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR operator int __nat::*() const {return 0;}
template <class _Tp>
_LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR
operator _Tp* () const {return 0;}
template <class _Tp, class _Up>
_LIBCPP_ALWAYS_INLINE
operator _Tp _Up::* () const {return 0;}
friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator==(nullptr_t, nullptr_t) {return true;}
friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator!=(nullptr_t, nullptr_t) {return false;}
friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator<(nullptr_t, nullptr_t) {return false;}
friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator<=(nullptr_t, nullptr_t) {return true;}
friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator>(nullptr_t, nullptr_t) {return false;}
friend _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR bool operator>=(nullptr_t, nullptr_t) {return true;}
};
inline _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t __get_nullptr_t() {return nullptr_t(0);}
#define nullptr _VSTD::__get_nullptr_t()
#endif // _LIBCPP_HAS_NO_NULLPTR
_LIBCPP_END_NAMESPACE_STD
#ifndef _LIBCPP_HAS_NO_NULLPTR
namespace std
{
typedef decltype(nullptr) nullptr_t;
}
#endif // _LIBCPP_HAS_NO_NULLPTR
#endif // _LIBCPP_CSTDDEF