76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
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#ifndef BOOST_METAPARSE_V1_UTIL_IN_RANGE_HPP
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#define BOOST_METAPARSE_V1_UTIL_IN_RANGE_HPP
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// Copyright Abel Sinkovics (abel@sinkovics.hu) 2009 - 2010.
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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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#include <boost/mpl/less_equal.hpp>
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#include <boost/mpl/comparison.hpp>
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#include <boost/mpl/quote.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/vector.hpp>
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namespace boost
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{
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namespace metaparse
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{
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namespace v1
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{
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namespace util
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{
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template <
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class LowerBound = boost::mpl::na,
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class UpperBound = boost::mpl::na,
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class Item = boost::mpl::na
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>
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struct in_range :
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boost::mpl::bool_<
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boost::mpl::less_equal<LowerBound, Item>::type::value
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&& boost::mpl::less_equal<Item, UpperBound>::type::value
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>
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{};
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template <class LowerBound, class UpperBound>
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struct in_range<LowerBound, UpperBound, boost::mpl::na>
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{
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typedef in_range type;
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template <class Item = boost::mpl::na>
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struct apply : in_range<LowerBound, UpperBound, Item> {};
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};
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template <class LowerBound>
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struct in_range<LowerBound, boost::mpl::na, boost::mpl::na>
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{
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typedef in_range type;
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template <
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class UpperBound = boost::mpl::na,
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class Item = boost::mpl::na
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>
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struct apply : in_range<LowerBound, UpperBound, Item> {};
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};
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template <>
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struct in_range<boost::mpl::na, boost::mpl::na, boost::mpl::na>
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{
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typedef in_range type;
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template <
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class LowerBound = boost::mpl::na,
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class UpperBound = boost::mpl::na,
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class Item = boost::mpl::na
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>
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struct apply : in_range<LowerBound, UpperBound, Item> {};
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};
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}
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}
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}
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}
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#endif
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