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67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
#ifndef BOOST_NUMERIC_NATIVE_HPP
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#define BOOST_NUMERIC_NATIVE_HPP
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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// Copyright (c) 2012 Robert Ramey
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <type_traits>
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#include <limits>
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#include "concept/promotion_policy.hpp"
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// policy which creates results types and values equal to that of C++ promotions.
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// When used in conjunction with a desired exception policy, traps errors but
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// does not otherwise alter the results produced by the program using it.
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namespace boost {
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namespace numeric {
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// forward declaration - safe type
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template<
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class BaseType,
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class PromotionPolicy,
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class ExceptionPolicy
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>
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struct safe;
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struct native {
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template<typename T, typename U, typename P, typename E>
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struct addition_result {
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typedef typename base_type<T>::type base_type_t;
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typedef typename base_type<U>::type base_type_u;
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typedef decltype(base_type_t() + base_type_u()) result_base_type;
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typedef safe<result_base_type, P, E> type;
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};
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template<typename T, typename U, typename P, typename E>
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struct subtraction_result {
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typedef typename base_type<T>::type base_type_t;
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typedef typename base_type<U>::type base_type_u;
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typedef decltype(base_type_t() - base_type_u()) result_base_type;
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typedef safe<result_base_type, P, E> type;
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};
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template<typename T, typename U, typename P, typename E>
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struct multiplication_result {
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typedef typename base_type<T>::type base_type_t;
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typedef typename base_type<U>::type base_type_u;
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typedef decltype(base_type_t() * base_type_u()) result_base_type;
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typedef safe<result_base_type, P, E> type;
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};
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template<typename T, typename U, typename P, typename E>
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struct division_result {
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typedef typename base_type<T>::type base_type_t;
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typedef typename base_type<U>::type base_type_u;
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typedef decltype(base_type_t() / base_type_u()) result_base_type;
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typedef safe<result_base_type, P, E> type;
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};
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};
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} // numeric
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} // boost
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#endif // BOOST_NUMERIC_NATIVE_HPP
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