Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   in_range.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   30.03.2008
Chris@16:  *
Chris@16:  * This header contains a predicate for checking if the provided value is within a half-open range.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <utility>
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: #include <boost/log/utility/functional/logical.hpp> // make_common_integral_type
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: //! The in_range functor
Chris@16: struct in_range_fun
Chris@16: {
Chris@16:     typedef bool result_type;
Chris@16: 
Chris@16:     template< typename T, typename U >
Chris@16:     bool operator() (T const& value, std::pair< U, U > const& rng) const
Chris@16:     {
Chris@16:         return op(value, rng, typename mpl::and_< is_integral< T >, is_integral< U > >::type());
Chris@16:     }
Chris@16: 
Chris@16: private:
Chris@16:     template< typename T, typename U >
Chris@16:     static bool op(T const& value, std::pair< U, U > const& rng, mpl::false_ const&)
Chris@16:     {
Chris@16:         return (value >= rng.first && value < rng.second);
Chris@16:     }
Chris@16:     template< typename T, typename U >
Chris@16:     static bool op(T const& value, std::pair< U, U > const& rng, mpl::true_ const&)
Chris@16:     {
Chris@16:         typedef typename aux::make_common_integral_type< T, U >::type common_integral_type;
Chris@16:         return (static_cast< common_integral_type >(value) >= static_cast< common_integral_type >(rng.first))
Chris@16:             && (static_cast< common_integral_type >(value) < static_cast< common_integral_type >(rng.second));
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_