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100 lines
2.9 KiB
C++
100 lines
2.9 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 "checked.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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struct native {
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template<typename T, typename U>
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using additive_operator_type =
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decltype(
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typename base_type<T>::type()
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+ typename base_type<U>::type()
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);
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template<typename T, typename U>
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using multiplicative_operator_type =
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decltype(
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typename base_type<T>::type()
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* typename base_type<U>::type()
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);
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// note: right/left shift require integer arguments
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template<typename T, typename U>
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using bitwise_shift_operator_type =
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decltype(
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typename base_type<T>::type()
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<< typename base_type<U>::type()
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);
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template<typename T, typename U>
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using bitwise_logic_operator_type =
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decltype(
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typename base_type<T>::type()
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& typename base_type<U>::type()
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);
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template<typename T, typename U>
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struct addition_result {
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using type = additive_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct subtraction_result {
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using type = additive_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct multiplication_result {
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using type = multiplicative_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct division_result {
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using type = multiplicative_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct modulus_result {
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using type = multiplicative_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct left_shift_result {
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using type = bitwise_shift_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct right_shift_result {
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using type = bitwise_shift_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct bitwise_or_result {
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using type = bitwise_logic_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct bitwise_and_result {
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using type = bitwise_logic_operator_type<T, U>;
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};
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template<typename T, typename U>
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struct bitwise_xor_result {
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using type = bitwise_logic_operator_type<T, U>;
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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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