boost/multiprecision/detail/standalone_config.hpp
///////////////////////////////////////////////////////////////
// Copyright 2010 - 2021 Douglas Gregor
// Copyright 2021 Matt Borland.
// Distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
//
// Used to support configuration options depending on standalone context
// by providing either required support or disabling functionality
#ifndef BOOST_MP_STANDALONE_CONFIG_HPP
#define BOOST_MP_STANDALONE_CONFIG_HPP
#include <climits>
// Boost.Config is dependency free so it is considered a requirement to use Boost.Multiprecision in standalone mode
#ifdef __has_include
# if __has_include(<boost/config.hpp>)
# include <boost/config.hpp>
# include <boost/config/workaround.hpp>
# else
# error "Boost.Config is considered a requirement to use Boost.Multiprecision in standalone mode. A package is provided at https://github.com/boostorg/multiprecision/releases"
# endif
#else
// Provides the less helpful fatal error: 'boost/config.hpp' file not found if not available
# include <boost/config.hpp>
# include <boost/config/workaround.hpp>
#endif
// Minimum language standard transition
#ifdef _MSVC_LANG
# if _MSVC_LANG < 201402L
# pragma warning("The minimum language standard to use Boost.Math will be C++14 starting in July 2023 (Boost 1.82 release)");
# endif
#else
# if __cplusplus < 201402L
# warning "The minimum language standard to use Boost.Math will be C++14 starting in July 2023 (Boost 1.82 release)"
# endif
#endif
// If any of the most frequently used boost headers are missing assume that standalone mode is supposed to be used
#ifdef __has_include
#if !__has_include(<boost/assert.hpp>) || !__has_include(<boost/lexical_cast.hpp>) || \
!__has_include(<boost/throw_exception.hpp>) || !__has_include(<boost/predef/other/endian.h>)
# ifndef BOOST_MP_STANDALONE
# define BOOST_MP_STANDALONE
# endif
#endif
#endif
#ifndef BOOST_MP_STANDALONE
#include <boost/integer.hpp>
#include <boost/integer_traits.hpp>
// Required typedefs for interoperability with standalone mode
#if defined(BOOST_HAS_INT128) && defined(__cplusplus)
namespace boost { namespace multiprecision {
using int128_type = boost::int128_type;
using uint128_type = boost::uint128_type;
}}
#endif
#if defined(BOOST_HAS_FLOAT128) && defined(__cplusplus)
namespace boost { namespace multiprecision {
using float128_type = boost::float128_type;
}}
#endif
// Boost.Math available by default
#define BOOST_MP_MATH_AVAILABLE
#else // Standalone mode
#ifdef BOOST_MATH_STANDALONE
# define BOOST_MP_MATH_AVAILABLE
#endif
#ifndef BOOST_MP_MATH_AVAILABLE
# define BOOST_MATH_INSTRUMENT_CODE(x)
#endif
// Prevent Macro sub
#ifndef BOOST_PREVENT_MACRO_SUBSTITUTION
# define BOOST_PREVENT_MACRO_SUBSTITUTION
#endif
#if defined(BOOST_HAS_INT128) && defined(__cplusplus)
namespace boost { namespace multiprecision {
# ifdef __GNUC__
__extension__ typedef __int128 int128_type;
__extension__ typedef unsigned __int128 uint128_type;
# else
typedef __int128 int128_type;
typedef unsigned __int128 uint128_type;
# endif
}}
#endif
// same again for __float128:
#if defined(BOOST_HAS_FLOAT128) && defined(__cplusplus)
namespace boost { namespace multiprecision {
# ifdef __GNUC__
__extension__ typedef __float128 float128_type;
# else
typedef __float128 float128_type;
# endif
}}
#endif
#endif // BOOST_MP_STANDALONE
// Workarounds for numeric limits on old compilers
#ifdef BOOST_HAS_INT128
# ifndef INT128_MAX
# define INT128_MAX static_cast<boost::multiprecision::int128_type>((static_cast<boost::multiprecision::uint128_type>(1) << ((__SIZEOF_INT128__ * __CHAR_BIT__) - 1)) - 1)
# endif
# ifndef INT128_MIN
# define INT128_MIN (-INT128_MAX - 1)
# endif
# ifndef UINT128_MAX
# define UINT128_MAX ((2 * static_cast<boost::multiprecision::uint128_type>(INT128_MAX)) + 1)
# endif
#endif
#endif // BOOST_MP_STANDALONE_CONFIG_HPP