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+/*
+ * Copyright Andrey Semashev 2007 - 2014.
+ * Distributed under 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)
+ */
+/*!
+ * \file in_range.hpp
+ * \author Andrey Semashev
+ * \date 30.03.2008
+ *
+ * This header contains a predicate for checking if the provided value is within a half-open range.
+ */
+
+#ifndef BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
+#define BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_
+
+#include <utility>
+#include <boost/log/detail/config.hpp>
+#include <boost/log/utility/functional/logical.hpp> // make_common_integral_type
+#include <boost/log/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+
+BOOST_LOG_OPEN_NAMESPACE
+
+//! The in_range functor
+struct in_range_fun
+{
+ typedef bool result_type;
+
+ template< typename T, typename U >
+ bool operator() (T const& value, std::pair< U, U > const& rng) const
+ {
+ return op(value, rng, typename mpl::and_< is_integral< T >, is_integral< U > >::type());
+ }
+
+private:
+ template< typename T, typename U >
+ static bool op(T const& value, std::pair< U, U > const& rng, mpl::false_ const&)
+ {
+ return (value >= rng.first && value < rng.second);
+ }
+ template< typename T, typename U >
+ static bool op(T const& value, std::pair< U, U > const& rng, mpl::true_ const&)
+ {
+ typedef typename aux::make_common_integral_type< T, U >::type common_integral_type;
+ return (static_cast< common_integral_type >(value) >= static_cast< common_integral_type >(rng.first))
+ && (static_cast< common_integral_type >(value) < static_cast< common_integral_type >(rng.second));
+ }
+};
+
+BOOST_LOG_CLOSE_NAMESPACE // namespace log
+
+} // namespace boost
+
+#include <boost/log/detail/footer.hpp>
+
+#endif // BOOST_LOG_UTILITY_FUNCTIONAL_IN_RANGE_HPP_INCLUDED_