/*
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* Copyright Andrey Semashev 2007 - 2015.
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* Distributed under the Boost Software License, Version 1.0.
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* (See 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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*/
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/*!
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* \file in_range.hpp
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* \author Andrey Semashev
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* \date 30.03.2008
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*
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* This header contains a predicate for checking if the provided value is within a half-open range.
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*/
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#ifndef BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
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#define BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
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#include <utility>
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#include <boost/type_traits/is_integral.hpp>
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#include <boost/type_traits/integral_constant.hpp>
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#include <boost/log/detail/config.hpp>
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#include <boost/log/utility/functional/logical.hpp> // make_common_integral_type
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#include <boost/log/detail/header.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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//! The in_range functor
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struct in_range_fun
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{
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typedef bool result_type;
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template< typename T, typename U >
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bool operator() (T const& value, std::pair< U, U > const& rng) const
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{
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return op(value, rng, integral_constant< bool, is_integral< T >::value && is_integral< U >::value >());
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}
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private:
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template< typename T, typename U >
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static bool op(T const& value, std::pair< U, U > const& rng, false_type)
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{
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return (value >= rng.first && value < rng.second);
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}
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template< typename T, typename U >
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static bool op(T const& value, std::pair< U, U > const& rng, true_type)
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{
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typedef typename aux::make_common_integral_type< T, U >::type common_integral_type;
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return (static_cast< common_integral_type >(value) >= static_cast< common_integral_type >(rng.first))
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&& (static_cast< common_integral_type >(value) < static_cast< common_integral_type >(rng.second));
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}
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};
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
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