include/__config - chromium/llvm-project/libcxx - Git at Google

 // -*- C++ -*-
 //===--------------------------- __config ---------------------------------===//
 //
 // The LLVM Compiler Infrastructure
 //
 // This file is dual licensed under the MIT and the University of Illinois Open
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #ifndef _LIBCPP_CONFIG
 #define _LIBCPP_CONFIG

 #if !defined(_MSC_VER) || defined(__clang__)
 #pragma GCC system_header
 #endif

 #ifdef __GNUC__
 #define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
 #endif

 #define _LIBCPP_VERSION 1101

 #define _LIBCPP_ABI_VERSION 1

 #define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
 #define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)

 #define _LIBCPP_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)

 #ifdef __LITTLE_ENDIAN__
 #if __LITTLE_ENDIAN__
 #define _LIBCPP_LITTLE_ENDIAN 1
 #define _LIBCPP_BIG_ENDIAN 0
 #endif // __LITTLE_ENDIAN__
 #endif // __LITTLE_ENDIAN__

 #ifdef __BIG_ENDIAN__
 #if __BIG_ENDIAN__
 #define _LIBCPP_LITTLE_ENDIAN 0
 #define _LIBCPP_BIG_ENDIAN 1
 #endif // __BIG_ENDIAN__
 #endif // __BIG_ENDIAN__

 #ifdef __FreeBSD__
 # include <sys/endian.h>
 # if _BYTE_ORDER == _LITTLE_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 1
 # define _LIBCPP_BIG_ENDIAN 0
 # else // _BYTE_ORDER == _LITTLE_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 0
 # define _LIBCPP_BIG_ENDIAN 1
 # endif // _BYTE_ORDER == _LITTLE_ENDIAN
 # ifndef __LONG_LONG_SUPPORTED
 # define _LIBCPP_HAS_NO_LONG_LONG
 # endif // __LONG_LONG_SUPPORTED
 #endif // __FreeBSD__

 #ifdef __NetBSD__
 # include <sys/endian.h>
 # if _BYTE_ORDER == _LITTLE_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 1
 # define _LIBCPP_BIG_ENDIAN 0
 # else // _BYTE_ORDER == _LITTLE_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 0
 # define _LIBCPP_BIG_ENDIAN 1
 # endif // _BYTE_ORDER == _LITTLE_ENDIAN
 # define _LIBCPP_HAS_QUICK_EXIT
 #endif // __NetBSD__

 #ifdef _WIN32
 # define _LIBCPP_LITTLE_ENDIAN 1
 # define _LIBCPP_BIG_ENDIAN 0
 // Compiler intrinsics (GCC or MSVC)
 # if defined(__clang__) \
  || (defined(_MSC_VER) && _MSC_VER >= 1400) \
  || (defined(__GNUC__) && _GNUC_VER > 403)
 # define _LIBCPP_HAS_IS_BASE_OF
 # endif
 # if defined(_MSC_VER) && !defined(__clang__)
 # define _LIBCPP_MSVC // Using Microsoft Visual C++ compiler
 # endif
 # define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
 #endif // _WIN32

 #ifdef __linux__
 # if defined(__GNUC__) && _GNUC_VER >= 403
 # define _LIBCPP_HAS_IS_BASE_OF
 # endif
 #endif

 #ifdef __sun__
 # include <sys/isa_defs.h>
 # ifdef _LITTLE_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 1
 # define _LIBCPP_BIG_ENDIAN 0
 # else
 # define _LIBCPP_LITTLE_ENDIAN 0
 # define _LIBCPP_BIG_ENDIAN 1
 # endif
 #endif // __sun__

 #if !defined(_LIBCPP_LITTLE_ENDIAN) || !defined(_LIBCPP_BIG_ENDIAN)
 # include <endian.h>
 # if __BYTE_ORDER == __LITTLE_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 1
 # define _LIBCPP_BIG_ENDIAN 0
 # elif __BYTE_ORDER == __BIG_ENDIAN
 # define _LIBCPP_LITTLE_ENDIAN 0
 # define _LIBCPP_BIG_ENDIAN 1
 # else // __BYTE_ORDER == __BIG_ENDIAN
 # error unable to determine endian
 # endif
 #endif // !defined(_LIBCPP_LITTLE_ENDIAN) || !defined(_LIBCPP_BIG_ENDIAN)

 #ifdef _WIN32

 // only really useful for a DLL
 #ifdef _LIBCPP_DLL // this should be a compiler builtin define ideally...
 # ifdef cxx_EXPORTS
 # define _LIBCPP_HIDDEN
 # define _LIBCPP_FUNC_VIS __declspec(dllexport)
 # define _LIBCPP_TYPE_VIS __declspec(dllexport)
 # else
 # define _LIBCPP_HIDDEN
 # define _LIBCPP_FUNC_VIS __declspec(dllimport)
 # define _LIBCPP_TYPE_VIS __declspec(dllimport)
 # endif
 #else
 # define _LIBCPP_HIDDEN
 # define _LIBCPP_FUNC_VIS
 # define _LIBCPP_TYPE_VIS
 #endif

 #define _LIBCPP_TYPE_VIS_ONLY
 #define _LIBCPP_FUNC_VIS_ONLY

 #ifndef _LIBCPP_INLINE_VISIBILITY
 # ifdef _LIBCPP_MSVC
 # define _LIBCPP_INLINE_VISIBILITY __forceinline
 # else // MinGW GCC and Clang
 # define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__always_inline__))
 # endif
 #endif

 #ifndef _LIBCPP_EXCEPTION_ABI
 #define _LIBCPP_EXCEPTION_ABI _LIBCPP_TYPE_VIS
 #endif

 #ifndef _LIBCPP_ALWAYS_INLINE
 # ifdef _LIBCPP_MSVC
 # define _LIBCPP_ALWAYS_INLINE __forceinline
 # endif
 #endif

 #endif // _WIN32

 #ifndef __has_attribute
 #define __has_attribute(__x) 0
 #endif

 #ifndef _LIBCPP_HIDDEN
 #define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
 #endif

 #ifndef _LIBCPP_FUNC_VIS
 #define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
 #endif

 #ifndef _LIBCPP_TYPE_VIS
 # if __has_attribute(type_visibility)
 # define _LIBCPP_TYPE_VIS __attribute__ ((__type_visibility__("default")))
 # else
 # define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
 # endif
 #endif

 #ifndef _LIBCPP_TYPE_VIS_ONLY
 # define _LIBCPP_TYPE_VIS_ONLY _LIBCPP_TYPE_VIS
 #endif

 #ifndef _LIBCPP_FUNC_VIS_ONLY
 # define _LIBCPP_FUNC_VIS_ONLY _LIBCPP_FUNC_VIS
 #endif

 #ifndef _LIBCPP_INLINE_VISIBILITY
 #define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__visibility__("hidden"), __always_inline__))
 #endif

 #ifndef _LIBCPP_EXCEPTION_ABI
 #define _LIBCPP_EXCEPTION_ABI _LIBCPP_TYPE_VIS
 #endif

 #ifndef _LIBCPP_ALWAYS_INLINE
 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__visibility__("hidden"), __always_inline__))
 #endif

 #if defined(__clang__)

 #if __has_feature(cxx_alignas)
 # define _ALIGNAS_TYPE(x) alignas(x)
 # define _ALIGNAS(x) alignas(x)
 #else
 # define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
 # define _ALIGNAS(x) __attribute__((__aligned__(x)))
 #endif

 #if !__has_feature(cxx_alias_templates)
 #define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
 #endif

 #ifndef __GXX_EXPERIMENTAL_CXX0X__
 #ifdef __linux__
 #define _LIBCPP_HAS_NO_UNICODE_CHARS
 #else
 typedef __char16_t char16_t;
 typedef __char32_t char32_t;
 #endif
 #endif

 #if !(__has_feature(cxx_exceptions))
 #define _LIBCPP_NO_EXCEPTIONS
 #endif

 #if !(__has_feature(cxx_rtti))
 #define _LIBCPP_NO_RTTI
 #endif

 #if !(__has_feature(cxx_strong_enums))
 #define _LIBCPP_HAS_NO_STRONG_ENUMS
 #endif

 #if !(__has_feature(cxx_decltype))
 #define _LIBCPP_HAS_NO_DECLTYPE
 #endif

 #if __has_feature(cxx_attributes)
 # define _LIBCPP_NORETURN [[noreturn]]
 #else
 # define _LIBCPP_NORETURN __attribute__ ((noreturn))
 #endif

 #if !(__has_feature(cxx_defaulted_functions))
 #define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
 #endif // !(__has_feature(cxx_defaulted_functions))

 #if !(__has_feature(cxx_deleted_functions))
 #define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 #endif // !(__has_feature(cxx_deleted_functions))

 #if !(__has_feature(cxx_lambdas))
 #define _LIBCPP_HAS_NO_LAMBDAS
 #endif

 #if !(__has_feature(cxx_nullptr))
 #define _LIBCPP_HAS_NO_NULLPTR
 #endif

 #if !(__has_feature(cxx_rvalue_references))
 #define _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #endif

 #if !(__has_feature(cxx_static_assert))
 #define _LIBCPP_HAS_NO_STATIC_ASSERT
 #endif

 #if !(__has_feature(cxx_auto_type))
 #define _LIBCPP_HAS_NO_AUTO_TYPE
 #endif

 #if !(__has_feature(cxx_access_control_sfinae)) || !__has_feature(cxx_trailing_return)
 #define _LIBCPP_HAS_NO_ADVANCED_SFINAE
 #endif

 #if !(__has_feature(cxx_variadic_templates))
 #define _LIBCPP_HAS_NO_VARIADICS
 #endif

 #if !(__has_feature(cxx_trailing_return))
 #define _LIBCPP_HAS_NO_TRAILING_RETURN
 #endif

 #if !(__has_feature(cxx_generalized_initializers))
 #define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 #endif

 #if __has_feature(is_base_of)
 # define _LIBCPP_HAS_IS_BASE_OF
 #endif

 // Objective-C++ features (opt-in)
 #if __has_feature(objc_arc)
 #define _LIBCPP_HAS_OBJC_ARC
 #endif

 #if __has_feature(objc_arc_weak)
 #define _LIBCPP_HAS_OBJC_ARC_WEAK
 #define _LIBCPP_HAS_NO_STRONG_ENUMS
 #endif

 #if !(__has_feature(cxx_constexpr))
 #define _LIBCPP_HAS_NO_CONSTEXPR
 #endif

 #if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
 #if defined(__FreeBSD__)
 #define _LIBCPP_HAS_QUICK_EXIT
 #define _LIBCPP_HAS_C11_FEATURES
 #elif defined(__linux__)
 #include <features.h>
 #if __GLIBC_PREREQ(2, 15)
 #define _LIBCPP_HAS_QUICK_EXIT
 #endif
 #if __GLIBC_PREREQ(2, 17)
 #define _LIBCPP_HAS_C11_FEATURES
 #endif
 #endif
 #endif

 #if (__has_feature(cxx_noexcept))
 # define _NOEXCEPT noexcept
 # define _NOEXCEPT_(x) noexcept(x)
 #else
 # define _NOEXCEPT throw()
 # define _NOEXCEPT_(x)
 #endif

 #if __has_feature(underlying_type)
 # define _LIBCXX_UNDERLYING_TYPE(T) __underlying_type(T)
 #endif

 // Inline namespaces are available in Clang regardless of C++ dialect.
 #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
 #define _LIBCPP_END_NAMESPACE_STD } }
 #define _VSTD std::_LIBCPP_NAMESPACE

 namespace std {
  inline namespace _LIBCPP_NAMESPACE {
  }
 }

 #elif defined(__GNUC__)

 #define _ALIGNAS(x) __attribute__((__aligned__(x)))
 #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))

 #define _LIBCPP_NORETURN __attribute__((noreturn))

 #if !__EXCEPTIONS
 #define _LIBCPP_NO_EXCEPTIONS
 #endif

 #define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
 #define _LIBCPP_HAS_NO_CONSTEXPR

 #define _NOEXCEPT throw()
 #define _NOEXCEPT_(x)

 #ifndef __GXX_EXPERIMENTAL_CXX0X__

 #define _LIBCPP_HAS_NO_ADVANCED_SFINAE
 #define _LIBCPP_HAS_NO_DECLTYPE
 #define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
 #define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 #define _LIBCPP_HAS_NO_NULLPTR
 #define _LIBCPP_HAS_NO_STATIC_ASSERT
 #define _LIBCPP_HAS_NO_UNICODE_CHARS
 #define _LIBCPP_HAS_NO_VARIADICS
 #define _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS

 #else // __GXX_EXPERIMENTAL_CXX0X__

 #define _LIBCPP_HAS_NO_TRAILING_RETURN
 #define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS

 #if _GNUC_VER < 403
 #define _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #endif

 #if _GNUC_VER < 403
 #define _LIBCPP_HAS_NO_STATIC_ASSERT
 #endif

 #if _GNUC_VER < 404
 #define _LIBCPP_HAS_NO_ADVANCED_SFINAE
 #define _LIBCPP_HAS_NO_DECLTYPE
 #define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
 #define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 #define _LIBCPP_HAS_NO_UNICODE_CHARS
 #define _LIBCPP_HAS_NO_VARIADICS
 #define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
 #endif // _GNUC_VER < 404

 #if _GNUC_VER < 406
 #define _LIBCPP_HAS_NO_NULLPTR
 #endif

 #endif // __GXX_EXPERIMENTAL_CXX0X__

 #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { namespace _LIBCPP_NAMESPACE {
 #define _LIBCPP_END_NAMESPACE_STD } }
 #define _VSTD std::_LIBCPP_NAMESPACE

 namespace std {
 namespace _LIBCPP_NAMESPACE {
 }
 using namespace _LIBCPP_NAMESPACE __attribute__((__strong__));
 }

 #elif defined(_LIBCPP_MSVC)

 #define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
 #define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
 #define _LIBCPP_HAS_NO_CONSTEXPR
 #define _LIBCPP_HAS_NO_UNICODE_CHARS
 #define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 #define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
 #define __alignof__ __alignof
 #define _LIBCPP_NORETURN __declspec(noreturn)
 #define _ALIGNAS(x) __declspec(align(x))
 #define _LIBCPP_HAS_NO_VARIADICS

 #define _NOEXCEPT throw()
 #define _NOEXCEPT_(x)

 #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {
 #define _LIBCPP_END_NAMESPACE_STD }
 #define _VSTD std

 namespace std {
 }

 #elif defined(__IBMCPP__)

 #define _ALIGNAS(x) __attribute__((__aligned__(x)))
 #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
 #define _ATTRIBUTE(x) __attribute__((x))
 #define _LIBCPP_NORETURN __attribute__((noreturn))

 #define _NOEXCEPT throw()
 #define _NOEXCEPT_(x)

 #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_NULLPTR
 #define _LIBCPP_HAS_NO_UNICODE_CHARS
 #define _LIBCPP_HAS_NO_STRONG_ENUMS
 #define _LIBCPP_HAS_IS_BASE_OF

 #if defined(_AIX)
 #define __MULTILOCALE_API
 #endif

 #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
 #define _LIBCPP_END_NAMESPACE_STD } }
 #define _VSTD std::_LIBCPP_NAMESPACE

 namespace std {
  inline namespace _LIBCPP_NAMESPACE {
  }
 }

 #endif // __clang__ || __GNUC___ || _MSC_VER || __IBMCPP__

 #ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
 typedef unsigned short char16_t;
 typedef unsigned int char32_t;
 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS

 #ifdef _LIBCPP_HAS_NO_STATIC_ASSERT

 template <bool> struct __static_assert_test;
 template <> struct __static_assert_test<true> {};
 template <unsigned> struct __static_assert_check {};
 #define static_assert(__b, __m) \
  typedef __static_assert_check<sizeof(__static_assert_test<(__b)>)> \
  _LIBCPP_CONCAT(__t, __LINE__)

 #endif // _LIBCPP_HAS_NO_STATIC_ASSERT

 #ifdef _LIBCPP_HAS_NO_DECLTYPE
 #define decltype(x) __typeof__(x)
 #endif

 #ifdef _LIBCPP_HAS_NO_CONSTEXPR
 #define _LIBCPP_CONSTEXPR
 #else
 #define _LIBCPP_CONSTEXPR constexpr
 #endif

 #ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
 #define _LIBCPP_DEFAULT {}
 #else
 #define _LIBCPP_DEFAULT = default;
 #endif

 #ifdef __GNUC__
 #define _NOALIAS __attribute__((__malloc__))
 #else
 #define _NOALIAS
 #endif

 #ifndef __has_feature
 #define __has_feature(__x) 0
 #endif

 #if __has_feature(cxx_explicit_conversions)
 # define _LIBCPP_EXPLICIT explicit
 #else
 # define _LIBCPP_EXPLICIT
 #endif

 #ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
 #define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
 #define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
  __lx __v_; \
  _LIBCPP_ALWAYS_INLINE x(__lx __v) : __v_(__v) {} \
  _LIBCPP_ALWAYS_INLINE explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
  _LIBCPP_ALWAYS_INLINE operator int() const {return __v_;} \
  };
 #else // _LIBCPP_HAS_NO_STRONG_ENUMS
 #define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_TYPE_VIS x
 #define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
 #endif // _LIBCPP_HAS_NO_STRONG_ENUMS

 #ifdef _LIBCPP_DEBUG
 # if _LIBCPP_DEBUG == 0
 # define _LIBCPP_DEBUG_LEVEL 1
 # elif _LIBCPP_DEBUG == 1
 # define _LIBCPP_DEBUG_LEVEL 2
 # else
 # error Supported values for _LIBCPP_DEBUG are 0 and 1
 # endif
 # define _LIBCPP_EXTERN_TEMPLATE(...)
 #endif

 #ifndef _LIBCPP_EXTERN_TEMPLATE
 #define _LIBCPP_EXTERN_TEMPLATE(...)
 #endif

 #ifndef _LIBCPP_EXTERN_TEMPLATE2
 #define _LIBCPP_EXTERN_TEMPLATE2(...) extern template __VA_ARGS__;
 #endif

 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(_WIN32) || defined(__sun__) || defined(__NetBSD__)
 #define _LIBCPP_LOCALE__L_EXTENSIONS 1
 #endif
 #ifdef __FreeBSD__
 #define _DECLARE_C99_LDBL_MATH 1
 #endif

 #if defined(__APPLE__) || defined(__FreeBSD__)
 #define _LIBCPP_HAS_DEFAULTRUNELOCALE
 #endif

 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
 #define _LIBCPP_WCTYPE_IS_MASK
 #endif

 #ifndef _LIBCPP_STD_VER
 # if __cplusplus <= 201103L
 # define _LIBCPP_STD_VER 11
 # else
 # define _LIBCPP_STD_VER 13 // current year, or date of c++14 ratification
 # endif
 #endif // _LIBCPP_STD_VER

 #if _LIBCPP_STD_VER <= 11
 #define _LIBCPP_CONSTEXPR_AFTER_CXX11
 #define _LIBCPP_EXPLICIT_AFTER_CXX11
 #else
 #define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
 #define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
 #endif

 #endif // _LIBCPP_CONFIG
	// -- C++ --
	//===--------------------------- __config ---------------------------------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is dual licensed under the MIT and the University of Illinois Open
	// Source Licenses. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#ifndef _LIBCPP_CONFIG
	#define _LIBCPP_CONFIG

	#if !defined(_MSC_VER) \|\| defined(__clang__)
	#pragma GCC system_header
	#endif

	#ifdef __GNUC__
	#define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
	#endif

	#define _LIBCPP_VERSION 1101

	#define _LIBCPP_ABI_VERSION 1

	#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
	#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)

	#define _LIBCPP_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)

	#ifdef __LITTLE_ENDIAN__
	#if __LITTLE_ENDIAN__
	#define _LIBCPP_LITTLE_ENDIAN 1
	#define _LIBCPP_BIG_ENDIAN 0
	#endif // __LITTLE_ENDIAN__
	#endif // __LITTLE_ENDIAN__

	#ifdef __BIG_ENDIAN__
	#if __BIG_ENDIAN__
	#define _LIBCPP_LITTLE_ENDIAN 0
	#define _LIBCPP_BIG_ENDIAN 1
	#endif // __BIG_ENDIAN__
	#endif // __BIG_ENDIAN__

	#ifdef __FreeBSD__
	# include <sys/endian.h>
	# if _BYTE_ORDER == _LITTLE_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 1
	# define _LIBCPP_BIG_ENDIAN 0
	# else // _BYTE_ORDER == _LITTLE_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 0
	# define _LIBCPP_BIG_ENDIAN 1
	# endif // _BYTE_ORDER == _LITTLE_ENDIAN
	# ifndef __LONG_LONG_SUPPORTED
	# define _LIBCPP_HAS_NO_LONG_LONG
	# endif // __LONG_LONG_SUPPORTED
	#endif // __FreeBSD__

	#ifdef __NetBSD__
	# include <sys/endian.h>
	# if _BYTE_ORDER == _LITTLE_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 1
	# define _LIBCPP_BIG_ENDIAN 0
	# else // _BYTE_ORDER == _LITTLE_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 0
	# define _LIBCPP_BIG_ENDIAN 1
	# endif // _BYTE_ORDER == _LITTLE_ENDIAN
	# define _LIBCPP_HAS_QUICK_EXIT
	#endif // __NetBSD__

	#ifdef _WIN32
	# define _LIBCPP_LITTLE_ENDIAN 1
	# define _LIBCPP_BIG_ENDIAN 0
	// Compiler intrinsics (GCC or MSVC)
	# if defined(__clang__) \
	\|\| (defined(_MSC_VER) && _MSC_VER >= 1400) \
	\|\| (defined(__GNUC__) && _GNUC_VER > 403)
	# define _LIBCPP_HAS_IS_BASE_OF
	# endif
	# if defined(_MSC_VER) && !defined(__clang__)
	# define _LIBCPP_MSVC // Using Microsoft Visual C++ compiler
	# endif
	# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
	#endif // _WIN32

	#ifdef __linux__
	# if defined(__GNUC__) && _GNUC_VER >= 403
	# define _LIBCPP_HAS_IS_BASE_OF
	# endif
	#endif

	#ifdef __sun__
	# include <sys/isa_defs.h>
	# ifdef _LITTLE_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 1
	# define _LIBCPP_BIG_ENDIAN 0
	# else
	# define _LIBCPP_LITTLE_ENDIAN 0
	# define _LIBCPP_BIG_ENDIAN 1
	# endif
	#endif // __sun__

	#if !defined(_LIBCPP_LITTLE_ENDIAN) \|\| !defined(_LIBCPP_BIG_ENDIAN)
	# include <endian.h>
	# if __BYTE_ORDER == __LITTLE_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 1
	# define _LIBCPP_BIG_ENDIAN 0
	# elif __BYTE_ORDER == __BIG_ENDIAN
	# define _LIBCPP_LITTLE_ENDIAN 0
	# define _LIBCPP_BIG_ENDIAN 1
	# else // __BYTE_ORDER == __BIG_ENDIAN
	# error unable to determine endian
	# endif
	#endif // !defined(_LIBCPP_LITTLE_ENDIAN) \|\| !defined(_LIBCPP_BIG_ENDIAN)

	#ifdef _WIN32

	// only really useful for a DLL
	#ifdef _LIBCPP_DLL // this should be a compiler builtin define ideally...
	# ifdef cxx_EXPORTS
	# define _LIBCPP_HIDDEN
	# define _LIBCPP_FUNC_VIS __declspec(dllexport)
	# define _LIBCPP_TYPE_VIS __declspec(dllexport)
	# else
	# define _LIBCPP_HIDDEN
	# define _LIBCPP_FUNC_VIS __declspec(dllimport)
	# define _LIBCPP_TYPE_VIS __declspec(dllimport)
	# endif
	#else
	# define _LIBCPP_HIDDEN
	# define _LIBCPP_FUNC_VIS
	# define _LIBCPP_TYPE_VIS
	#endif

	#define _LIBCPP_TYPE_VIS_ONLY
	#define _LIBCPP_FUNC_VIS_ONLY

	#ifndef _LIBCPP_INLINE_VISIBILITY
	# ifdef _LIBCPP_MSVC
	# define _LIBCPP_INLINE_VISIBILITY __forceinline
	# else // MinGW GCC and Clang
	# define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__always_inline__))
	# endif
	#endif

	#ifndef _LIBCPP_EXCEPTION_ABI
	#define _LIBCPP_EXCEPTION_ABI _LIBCPP_TYPE_VIS
	#endif

	#ifndef _LIBCPP_ALWAYS_INLINE
	# ifdef _LIBCPP_MSVC
	# define _LIBCPP_ALWAYS_INLINE __forceinline
	# endif
	#endif

	#endif // _WIN32

	#ifndef __has_attribute
	#define __has_attribute(__x) 0
	#endif

	#ifndef _LIBCPP_HIDDEN
	#define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
	#endif

	#ifndef _LIBCPP_FUNC_VIS
	#define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
	#endif

	#ifndef _LIBCPP_TYPE_VIS
	# if __has_attribute(type_visibility)
	# define _LIBCPP_TYPE_VIS __attribute__ ((__type_visibility__("default")))
	# else
	# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
	# endif
	#endif

	#ifndef _LIBCPP_TYPE_VIS_ONLY
	# define _LIBCPP_TYPE_VIS_ONLY _LIBCPP_TYPE_VIS
	#endif

	#ifndef _LIBCPP_FUNC_VIS_ONLY
	# define _LIBCPP_FUNC_VIS_ONLY _LIBCPP_FUNC_VIS
	#endif

	#ifndef _LIBCPP_INLINE_VISIBILITY
	#define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__visibility__("hidden"), __always_inline__))
	#endif

	#ifndef _LIBCPP_EXCEPTION_ABI
	#define _LIBCPP_EXCEPTION_ABI _LIBCPP_TYPE_VIS
	#endif

	#ifndef _LIBCPP_ALWAYS_INLINE
	#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__visibility__("hidden"), __always_inline__))
	#endif

	#if defined(__clang__)

	#if __has_feature(cxx_alignas)
	# define _ALIGNAS_TYPE(x) alignas(x)
	# define _ALIGNAS(x) alignas(x)
	#else
	# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
	# define _ALIGNAS(x) __attribute__((__aligned__(x)))
	#endif

	#if !__has_feature(cxx_alias_templates)
	#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
	#endif

	#ifndef __GXX_EXPERIMENTAL_CXX0X__
	#ifdef __linux__
	#define _LIBCPP_HAS_NO_UNICODE_CHARS
	#else
	typedef __char16_t char16_t;
	typedef __char32_t char32_t;
	#endif
	#endif

	#if !(__has_feature(cxx_exceptions))
	#define _LIBCPP_NO_EXCEPTIONS
	#endif

	#if !(__has_feature(cxx_rtti))
	#define _LIBCPP_NO_RTTI
	#endif

	#if !(__has_feature(cxx_strong_enums))
	#define _LIBCPP_HAS_NO_STRONG_ENUMS
	#endif

	#if !(__has_feature(cxx_decltype))
	#define _LIBCPP_HAS_NO_DECLTYPE
	#endif

	#if __has_feature(cxx_attributes)
	# define _LIBCPP_NORETURN [[noreturn]]
	#else
	# define _LIBCPP_NORETURN __attribute__ ((noreturn))
	#endif

	#if !(__has_feature(cxx_defaulted_functions))
	#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
	#endif // !(__has_feature(cxx_defaulted_functions))

	#if !(__has_feature(cxx_deleted_functions))
	#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
	#endif // !(__has_feature(cxx_deleted_functions))

	#if !(__has_feature(cxx_lambdas))
	#define _LIBCPP_HAS_NO_LAMBDAS
	#endif

	#if !(__has_feature(cxx_nullptr))
	#define _LIBCPP_HAS_NO_NULLPTR
	#endif

	#if !(__has_feature(cxx_rvalue_references))
	#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
	#endif

	#if !(__has_feature(cxx_static_assert))
	#define _LIBCPP_HAS_NO_STATIC_ASSERT
	#endif

	#if !(__has_feature(cxx_auto_type))
	#define _LIBCPP_HAS_NO_AUTO_TYPE
	#endif

	#if !(__has_feature(cxx_access_control_sfinae)) \|\| !__has_feature(cxx_trailing_return)
	#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
	#endif

	#if !(__has_feature(cxx_variadic_templates))
	#define _LIBCPP_HAS_NO_VARIADICS
	#endif

	#if !(__has_feature(cxx_trailing_return))
	#define _LIBCPP_HAS_NO_TRAILING_RETURN
	#endif

	#if !(__has_feature(cxx_generalized_initializers))
	#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
	#endif

	#if __has_feature(is_base_of)
	# define _LIBCPP_HAS_IS_BASE_OF
	#endif

	// Objective-C++ features (opt-in)
	#if __has_feature(objc_arc)
	#define _LIBCPP_HAS_OBJC_ARC
	#endif

	#if __has_feature(objc_arc_weak)
	#define _LIBCPP_HAS_OBJC_ARC_WEAK
	#define _LIBCPP_HAS_NO_STRONG_ENUMS
	#endif

	#if !(__has_feature(cxx_constexpr))
	#define _LIBCPP_HAS_NO_CONSTEXPR
	#endif

	#if __ISO_C_VISIBLE >= 2011 \|\| __cplusplus >= 201103L
	#if defined(__FreeBSD__)
	#define _LIBCPP_HAS_QUICK_EXIT
	#define _LIBCPP_HAS_C11_FEATURES
	#elif defined(__linux__)
	#include <features.h>
	#if __GLIBC_PREREQ(2, 15)
	#define _LIBCPP_HAS_QUICK_EXIT
	#endif
	#if __GLIBC_PREREQ(2, 17)
	#define _LIBCPP_HAS_C11_FEATURES
	#endif
	#endif
	#endif

	#if (__has_feature(cxx_noexcept))
	# define _NOEXCEPT noexcept
	# define _NOEXCEPT_(x) noexcept(x)
	#else
	# define _NOEXCEPT throw()
	# define _NOEXCEPT_(x)
	#endif

	#if __has_feature(underlying_type)
	# define _LIBCXX_UNDERLYING_TYPE(T) __underlying_type(T)
	#endif

	// Inline namespaces are available in Clang regardless of C++ dialect.
	#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
	#define _LIBCPP_END_NAMESPACE_STD } }
	#define _VSTD std::_LIBCPP_NAMESPACE

	namespace std {
	inline namespace _LIBCPP_NAMESPACE {
	}
	}

	#elif defined(__GNUC__)

	#define _ALIGNAS(x) __attribute__((__aligned__(x)))
	#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))

	#define _LIBCPP_NORETURN __attribute__((noreturn))

	#if !__EXCEPTIONS
	#define _LIBCPP_NO_EXCEPTIONS
	#endif

	#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
	#define _LIBCPP_HAS_NO_CONSTEXPR

	#define _NOEXCEPT throw()
	#define _NOEXCEPT_(x)

	#ifndef __GXX_EXPERIMENTAL_CXX0X__

	#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
	#define _LIBCPP_HAS_NO_DECLTYPE
	#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
	#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
	#define _LIBCPP_HAS_NO_NULLPTR
	#define _LIBCPP_HAS_NO_STATIC_ASSERT
	#define _LIBCPP_HAS_NO_UNICODE_CHARS
	#define _LIBCPP_HAS_NO_VARIADICS
	#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
	#define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS

	#else // __GXX_EXPERIMENTAL_CXX0X__

	#define _LIBCPP_HAS_NO_TRAILING_RETURN
	#define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS

	#if _GNUC_VER < 403
	#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
	#endif

	#if _GNUC_VER < 403
	#define _LIBCPP_HAS_NO_STATIC_ASSERT
	#endif

	#if _GNUC_VER < 404
	#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
	#define _LIBCPP_HAS_NO_DECLTYPE
	#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
	#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
	#define _LIBCPP_HAS_NO_UNICODE_CHARS
	#define _LIBCPP_HAS_NO_VARIADICS
	#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
	#endif // _GNUC_VER < 404

	#if _GNUC_VER < 406
	#define _LIBCPP_HAS_NO_NULLPTR
	#endif

	#endif // __GXX_EXPERIMENTAL_CXX0X__

	#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { namespace _LIBCPP_NAMESPACE {
	#define _LIBCPP_END_NAMESPACE_STD } }
	#define _VSTD std::_LIBCPP_NAMESPACE

	namespace std {
	namespace _LIBCPP_NAMESPACE {
	}
	using namespace _LIBCPP_NAMESPACE __attribute__((__strong__));
	}

	#elif defined(_LIBCPP_MSVC)

	#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
	#define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
	#define _LIBCPP_HAS_NO_CONSTEXPR
	#define _LIBCPP_HAS_NO_UNICODE_CHARS
	#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
	#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
	#define __alignof__ __alignof
	#define _LIBCPP_NORETURN __declspec(noreturn)
	#define _ALIGNAS(x) __declspec(align(x))
	#define _LIBCPP_HAS_NO_VARIADICS

	#define _NOEXCEPT throw()
	#define _NOEXCEPT_(x)

	#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {
	#define _LIBCPP_END_NAMESPACE_STD }
	#define _VSTD std

	namespace std {
	}

	#elif defined(__IBMCPP__)

	#define _ALIGNAS(x) __attribute__((__aligned__(x)))
	#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
	#define _ATTRIBUTE(x) __attribute__((x))
	#define _LIBCPP_NORETURN __attribute__((noreturn))

	#define _NOEXCEPT throw()
	#define _NOEXCEPT_(x)

	#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_NULLPTR
	#define _LIBCPP_HAS_NO_UNICODE_CHARS
	#define _LIBCPP_HAS_NO_STRONG_ENUMS
	#define _LIBCPP_HAS_IS_BASE_OF

	#if defined(_AIX)
	#define __MULTILOCALE_API
	#endif

	#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
	#define _LIBCPP_END_NAMESPACE_STD } }
	#define _VSTD std::_LIBCPP_NAMESPACE

	namespace std {
	inline namespace _LIBCPP_NAMESPACE {
	}
	}

	#endif // __clang__ \|\| __GNUC___ \|\| _MSC_VER \|\| __IBMCPP__

	#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
	typedef unsigned short char16_t;
	typedef unsigned int char32_t;
	#endif // _LIBCPP_HAS_NO_UNICODE_CHARS

	#ifdef _LIBCPP_HAS_NO_STATIC_ASSERT

	template <bool> struct __static_assert_test;
	template <> struct __static_assert_test<true> {};
	template <unsigned> struct __static_assert_check {};
	#define static_assert(__b, __m) \
	typedef __static_assert_check<sizeof(__static_assert_test<(__b)>)> \
	_LIBCPP_CONCAT(__t, __LINE__)

	#endif // _LIBCPP_HAS_NO_STATIC_ASSERT

	#ifdef _LIBCPP_HAS_NO_DECLTYPE
	#define decltype(x) __typeof__(x)
	#endif

	#ifdef _LIBCPP_HAS_NO_CONSTEXPR
	#define _LIBCPP_CONSTEXPR
	#else
	#define _LIBCPP_CONSTEXPR constexpr
	#endif

	#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
	#define _LIBCPP_DEFAULT {}
	#else
	#define _LIBCPP_DEFAULT = default;
	#endif

	#ifdef __GNUC__
	#define _NOALIAS __attribute__((__malloc__))
	#else
	#define _NOALIAS
	#endif

	#ifndef __has_feature
	#define __has_feature(__x) 0
	#endif

	#if __has_feature(cxx_explicit_conversions)
	# define _LIBCPP_EXPLICIT explicit
	#else
	# define _LIBCPP_EXPLICIT
	#endif

	#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
	#define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
	#define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
	__lx __v_; \
	_LIBCPP_ALWAYS_INLINE x(__lx __v) : __v_(__v) {} \
	_LIBCPP_ALWAYS_INLINE explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
	_LIBCPP_ALWAYS_INLINE operator int() const {return __v_;} \
	};
	#else // _LIBCPP_HAS_NO_STRONG_ENUMS
	#define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_TYPE_VIS x
	#define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
	#endif // _LIBCPP_HAS_NO_STRONG_ENUMS

	#ifdef _LIBCPP_DEBUG
	# if _LIBCPP_DEBUG == 0
	# define _LIBCPP_DEBUG_LEVEL 1
	# elif _LIBCPP_DEBUG == 1
	# define _LIBCPP_DEBUG_LEVEL 2
	# else
	# error Supported values for _LIBCPP_DEBUG are 0 and 1
	# endif
	# define _LIBCPP_EXTERN_TEMPLATE(...)
	#endif

	#ifndef _LIBCPP_EXTERN_TEMPLATE
	#define _LIBCPP_EXTERN_TEMPLATE(...)
	#endif

	#ifndef _LIBCPP_EXTERN_TEMPLATE2
	#define _LIBCPP_EXTERN_TEMPLATE2(...) extern template __VA_ARGS__;
	#endif

	#if defined(__APPLE__) \|\| defined(__FreeBSD__) \|\| defined(_WIN32) \|\| defined(__sun__) \|\| defined(__NetBSD__)
	#define _LIBCPP_LOCALE__L_EXTENSIONS 1
	#endif
	#ifdef __FreeBSD__
	#define _DECLARE_C99_LDBL_MATH 1
	#endif

	#if defined(__APPLE__) \|\| defined(__FreeBSD__)
	#define _LIBCPP_HAS_DEFAULTRUNELOCALE
	#endif

	#if defined(__APPLE__) \|\| defined(__FreeBSD__) \|\| defined(__sun__)
	#define _LIBCPP_WCTYPE_IS_MASK
	#endif

	#ifndef _LIBCPP_STD_VER
	# if __cplusplus <= 201103L
	# define _LIBCPP_STD_VER 11
	# else
	# define _LIBCPP_STD_VER 13 // current year, or date of c++14 ratification
	# endif
	#endif // _LIBCPP_STD_VER

	#if _LIBCPP_STD_VER <= 11
	#define _LIBCPP_CONSTEXPR_AFTER_CXX11
	#define _LIBCPP_EXPLICIT_AFTER_CXX11
	#else
	#define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
	#define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
	#endif

	#endif // _LIBCPP_CONFIG