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

#ifndef BOOST_MATH_CONSTANTS_MORE_HPP
#define BOOST_MATH_CONSTANTS_MORE_HPP

#include <type_traits>

#include <boost/math/cstdfloat/cstdfloat_types_more.hpp>
#include <boost/math/constants/constants.hpp>
#include <boost/lexical_cast.hpp>



namespace boost
{
namespace math
{
namespace constants
{
#if defined(__cpp_concepts)

#define BOOST_MAKE_MATH_CONSTANT(NAME, VALUE_F, VALUE_S)	\
	/* make non-constexpr constant in static_constants */	\
	namespace static_constants { template <typename Type> requires (!std::is_floating_point_v<Type>) static const Type NAME##_v = boost::lexical_cast<Type>(VALUE_S); }	\
	/* make inline constexpr constant */	\
	template <typename Type> requires (std::is_floating_point_v<Type>)	inline constexpr Type NAME##_v = Type(BOOST_JOIN(VALUE_F, BOOST_FLOATMAX_SUFFIX));	\
	/* getter for non-constexpr constant */	\
	template <typename Type> requires (!std::is_floating_point_v<Type>)	\
	BOOST_FORCEINLINE Type	NAME()	noexcept {	return static_constants::NAME##_v<Type>; }	\
	/* getter for constexpr constant */	\
	template <typename Type> requires (std::is_floating_point_v<Type>)	\
	BOOST_FORCEINLINE constexpr Type	NAME()	noexcept {	return NAME##_v<Type>; }

#else	//	__cpp_concepts

//	helper: make inline constexpr constant if available
#if defined(BOOST_NO_CXX17_INLINE_VARIABLES)
	#define BOOST_MAKE_MATH_CONSTANT_INLINE(NAME, VALUE_F)
#else
	#define BOOST_MAKE_MATH_CONSTANT_INLINE(NAME, VALUE_F)	\
		template <typename Type, typename std::enable_if<std::is_floating_point<Type>::value, bool>::type = true>	\
		inline constexpr Type NAME##_v = Type(BOOST_JOIN(VALUE_F, BOOST_FLOATMAX_SUFFIX));
#endif

#define BOOST_MAKE_MATH_CONSTANT(NAME, VALUE_F, VALUE_S)	\
	/* make non-constexpr constant in static_constants */	\
	namespace static_constants { template <typename Type, typename std::enable_if<!std::is_floating_point<Type>::value, bool>::type = true> static const Type NAME##_v = boost::lexical_cast<Type>(VALUE_S); }	\
	/* make inline constexpr constant */	\
	BOOST_MAKE_MATH_CONSTANT_INLINE(NAME, VALUE_F)	\
	/* getter for non-constexpr constant */	\
	template <typename Type, typename std::enable_if<!std::is_floating_point<Type>::value, bool>::type = true>	\
	BOOST_FORCEINLINE Type	NAME()	noexcept {	return static_constants::NAME##_v<Type>; }	\
	/* getter for constexpr constant */	\
	template <typename Type, typename std::enable_if<std::is_floating_point<Type>::value, bool>::type = true>	\
	BOOST_FORCEINLINE BOOST_CONSTEXPR Type	NAME()	noexcept { return Type(BOOST_JOIN(VALUE_F, BOOST_FLOATMAX_SUFFIX));	}

#endif	//	__cpp_concepts


BOOST_MAKE_MATH_CONSTANT(psi,       -0.61803398874989484820458683436563811772030917980576286213544862270526046281890244970720720418939113748475408808, "-0.61803398874989484820458683436563811772030917980576286213544862270526046281890244970720720418939113748475408808")
BOOST_MAKE_MATH_CONSTANT(root_five,  2.23606797749978969640917366873127631939404588074105727133751596842430563183423686268724850378930568695068359375,  "2.23606797749978969640917366873127631939404588074105727133751596842430563183423686268724850378930568695068359375")

//BOOST_DEFINE_MATH_CONSTANT(psi,       -0.61803398874989484820458683436563811772030917980576286213544862270526046281890244970720720418939113748475408808, "-0.61803398874989484820458683436563811772030917980576286213544862270526046281890244970720720418939113748475408808")
//BOOST_DEFINE_MATH_CONSTANT(root_five,  2.23606797749978969640917366873127631939404588074105727133751596842430563183423686268724850378930568695068359375,  "2.23606797749978969640917366873127631939404588074105727133751596842430563183423686268724850378930568695068359375")
}	//	constants
}	//	math
}	//	boost

#endif	//	BOOST_MATH_CONSTANTS_MORE_HPP