//	Distributed under the Boost Software License Version 1.0 https://www.boost.org/LICENSE_1_0.txt
//	Copyright Gero Peterhoff

#ifndef BOOST_CONFIG_MORE_HPP
#define BOOST_CONFIG_MORE_HPP

#include <boost/config.hpp>



//	C++17
#if !defined(__cpp_constexpr) || (__cpp_constexpr < 201603L)
	#define BOOST_NO_CXX17_CONSTEXPR
#endif

#if defined(BOOST_NO_CXX17_CONSTEXPR)
	#define BOOST_CXX17_CONSTEXPR
#else
	#define BOOST_CXX17_CONSTEXPR constexpr
#endif



//	C++20
#if (BOOST_CXX_VERSION < 202002L)
	#define BOOST_NO_CXX20
#endif

#if !defined(__cpp_constexpr) || (__cpp_constexpr < 202002L)
	#define BOOST_NO_CXX20_CONSTEXPR
#endif

#if defined(BOOST_NO_CXX20_CONSTEXPR)
	#define BOOST_CXX20_CONSTEXPR
#else
	#define BOOST_CXX20_CONSTEXPR constexpr
#endif

#if !defined(__cpp_consteval) || (__cpp_consteval < 201811L)
	#define BOOST_CXX20_NO_CONSTEVAL
#endif



//	C++23
#if (BOOST_CXX_VERSION < 202100L)
	#define BOOST_NO_CXX23
#endif

#if !defined(__cpp_constexpr) || (__cpp_constexpr < 202211L)
	#define BOOST_NO_CXX23_CONSTEXPR
#endif

#if defined(BOOST_NO_CXX23_CONSTEXPR)
	#define BOOST_CXX23_CONSTEXPR
#else
	#define BOOST_CXX23_CONSTEXPR constexpr
#endif

#if !defined(__cpp_consteval) || (__cpp_consteval < 202211L)
	#define BOOST_CXX23_NO_CONSTEVAL
#endif

#if !__has_include(<expected>)
	#define BOOST_NO_CXX23_HDR_EXPECTED
#endif

#if !__has_include(<flat_map>)
	#define BOOST_NO_CXX23_HDR_FLAT_MAP
#endif

#if !__has_include(<flat_set>)
	#define BOOST_NO_CXX23_HDR_FLAT_SET
#endif

#if !__has_include(<generator>)
	#define BOOST_NO_CXX23_HDR_GENERATOR
#endif

#if !__has_include(<mdspan>)
	#define BOOST_NO_CXX23_HDR_MDSPAN
#endif

#if !__has_include(<print>)
	#define BOOST_NO_CXX23_HDR_PRINT
#endif

#if !__has_include(<spanstream>)
	#define BOOST_NO_CXX23_HDR_SPANSTREAM
#endif

#if !__has_include(<stacktrace>)
	#define BOOST_NO_CXX23_HDR_STACKTRACE
#endif

#if !__has_include(<stdfloat>)
	#define BOOST_NO_CXX23_HDR_STDFLOAT
#endif



//	more
#if defined(__cpp_inline_variables)
	#define BOOST_INLINE_STATIC_CONSTEXPR	inline BOOST_STATIC_CONSTEXPR
#else
	#define BOOST_INLINE_STATIC_CONSTEXPR	BOOST_STATIC_CONSTEXPR
#endif

#if defined(__cpp_consteval) || defined(__cpp_constexpr)
	#if defined(__cpp_consteval)
		#define BOOST_CONSTEVAL_OR_CONSTEXPR	consteval
	#else
		#define BOOST_CONSTEVAL_OR_CONSTEXPR	constexpr
	#endif
#else
	#define BOOST_CONSTEVAL_OR_CONSTEXPR const
#endif

#endif	//	BOOST_CONFIG_MORE_HPP