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Diffstat (limited to 'src/third_party/boost-1.56.0/boost/math/tools/promotion.hpp')
-rw-r--r-- | src/third_party/boost-1.56.0/boost/math/tools/promotion.hpp | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/src/third_party/boost-1.56.0/boost/math/tools/promotion.hpp b/src/third_party/boost-1.56.0/boost/math/tools/promotion.hpp deleted file mode 100644 index b3ad2040779..00000000000 --- a/src/third_party/boost-1.56.0/boost/math/tools/promotion.hpp +++ /dev/null @@ -1,175 +0,0 @@ -// boost\math\tools\promotion.hpp - -// Copyright John Maddock 2006. -// Copyright Paul A. Bristow 2006. - -// Use, modification and distribution are subject to the -// Boost Software License, Version 1.0. -// (See accompanying file LICENSE_1_0.txt -// or copy at http://www.boost.org/LICENSE_1_0.txt) - -// Promote arguments functions to allow math functions to have arguments -// provided as integer OR real (floating-point, built-in or UDT) -// (called ArithmeticType in functions that use promotion) -// that help to reduce the risk of creating multiple instantiations. -// Allows creation of an inline wrapper that forwards to a foo(RT, RT) function, -// so you never get to instantiate any mixed foo(RT, IT) functions. - -#ifndef BOOST_MATH_PROMOTION_HPP -#define BOOST_MATH_PROMOTION_HPP - -#ifdef _MSC_VER -#pragma once -#endif - -// Boost type traits: -#include <boost/math/tools/config.hpp> -#include <boost/type_traits/is_floating_point.hpp> // for boost::is_floating_point; -#include <boost/type_traits/is_integral.hpp> // for boost::is_integral -#include <boost/type_traits/is_convertible.hpp> // for boost::is_convertible -#include <boost/type_traits/is_same.hpp>// for boost::is_same -#include <boost/type_traits/remove_cv.hpp>// for boost::remove_cv -// Boost Template meta programming: -#include <boost/mpl/if.hpp> // for boost::mpl::if_c. -#include <boost/mpl/and.hpp> // for boost::mpl::if_c. -#include <boost/mpl/or.hpp> // for boost::mpl::if_c. -#include <boost/mpl/not.hpp> // for boost::mpl::if_c. - -#ifdef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS -#include <boost/static_assert.hpp> -#endif - -namespace boost -{ - namespace math - { - namespace tools - { - // If either T1 or T2 is an integer type, - // pretend it was a double (for the purposes of further analysis). - // Then pick the wider of the two floating-point types - // as the actual signature to forward to. - // For example: - // foo(int, short) -> double foo(double, double); - // foo(int, float) -> double foo(double, double); - // Note: NOT float foo(float, float) - // foo(int, double) -> foo(double, double); - // foo(double, float) -> double foo(double, double); - // foo(double, float) -> double foo(double, double); - // foo(any-int-or-float-type, long double) -> foo(long double, long double); - // but ONLY float foo(float, float) is unchanged. - // So the only way to get an entirely float version is to call foo(1.F, 2.F), - // But since most (all?) the math functions convert to double internally, - // probably there would not be the hoped-for gain by using float here. - - // This follows the C-compatible conversion rules of pow, etc - // where pow(int, float) is converted to pow(double, double). - - template <class T> - struct promote_arg - { // If T is integral type, then promote to double. - typedef typename mpl::if_<is_integral<T>, double, T>::type type; - }; - // These full specialisations reduce mpl::if_ usage and speed up - // compilation: - template <> struct promote_arg<float> { typedef float type; }; - template <> struct promote_arg<double>{ typedef double type; }; - template <> struct promote_arg<long double> { typedef long double type; }; - template <> struct promote_arg<int> { typedef double type; }; - - template <class T1, class T2> - struct promote_args_2 - { // Promote, if necessary, & pick the wider of the two floating-point types. - // for both parameter types, if integral promote to double. - typedef typename promote_arg<T1>::type T1P; // T1 perhaps promoted. - typedef typename promote_arg<T2>::type T2P; // T2 perhaps promoted. - - typedef typename mpl::if_< - typename mpl::and_<is_floating_point<T1P>, is_floating_point<T2P> >::type, // both T1P and T2P are floating-point? - typename mpl::if_< typename mpl::or_<is_same<long double, T1P>, is_same<long double, T2P> >::type, // either long double? - long double, // then result type is long double. - typename mpl::if_< typename mpl::or_<is_same<double, T1P>, is_same<double, T2P> >::type, // either double? - double, // result type is double. - float // else result type is float. - >::type - >::type, - // else one or the other is a user-defined type: - typename mpl::if_< typename mpl::and_<mpl::not_<is_floating_point<T2P> >, ::boost::is_convertible<T1P, T2P> >, T2P, T1P>::type>::type type; - }; // promote_arg2 - // These full specialisations reduce mpl::if_ usage and speed up - // compilation: - template <> struct promote_args_2<float, float> { typedef float type; }; - template <> struct promote_args_2<double, double>{ typedef double type; }; - template <> struct promote_args_2<long double, long double> { typedef long double type; }; - template <> struct promote_args_2<int, int> { typedef double type; }; - template <> struct promote_args_2<int, float> { typedef double type; }; - template <> struct promote_args_2<float, int> { typedef double type; }; - template <> struct promote_args_2<int, double> { typedef double type; }; - template <> struct promote_args_2<double, int> { typedef double type; }; - template <> struct promote_args_2<int, long double> { typedef long double type; }; - template <> struct promote_args_2<long double, int> { typedef long double type; }; - template <> struct promote_args_2<float, double> { typedef double type; }; - template <> struct promote_args_2<double, float> { typedef double type; }; - template <> struct promote_args_2<float, long double> { typedef long double type; }; - template <> struct promote_args_2<long double, float> { typedef long double type; }; - template <> struct promote_args_2<double, long double> { typedef long double type; }; - template <> struct promote_args_2<long double, double> { typedef long double type; }; - - template <class T1, class T2=float, class T3=float, class T4=float, class T5=float, class T6=float> - struct promote_args - { - typedef typename promote_args_2< - typename remove_cv<T1>::type, - typename promote_args_2< - typename remove_cv<T2>::type, - typename promote_args_2< - typename remove_cv<T3>::type, - typename promote_args_2< - typename remove_cv<T4>::type, - typename promote_args_2< - typename remove_cv<T5>::type, typename remove_cv<T6>::type - >::type - >::type - >::type - >::type - >::type type; - -#ifdef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS - // - // Guard against use of long double if it's not supported: - // - BOOST_STATIC_ASSERT_MSG((0 == ::boost::is_same<type, long double>::value), "Sorry, but this platform does not have sufficient long double support for the special functions to be reliably implemented."); -#endif - }; - - // - // This struct is the same as above, but has no static assert on long double usage, - // it should be used only on functions that can be implemented for long double - // even when std lib support is missing or broken for that type. - // - template <class T1, class T2=float, class T3=float, class T4=float, class T5=float, class T6=float> - struct promote_args_permissive - { - typedef typename promote_args_2< - typename remove_cv<T1>::type, - typename promote_args_2< - typename remove_cv<T2>::type, - typename promote_args_2< - typename remove_cv<T3>::type, - typename promote_args_2< - typename remove_cv<T4>::type, - typename promote_args_2< - typename remove_cv<T5>::type, typename remove_cv<T6>::type - >::type - >::type - >::type - >::type - >::type type; - }; - - } // namespace tools - } // namespace math -} // namespace boost - -#endif // BOOST_MATH_PROMOTION_HPP - |