/* Boost interval/compare/possible.hpp template implementation file
 *
 * Copyright 2003 Guillaume Melquiond
 *
 * 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)
 */

#ifndef BOOST_NUMERIC_INTERVAL_COMPARE_POSSIBLE_HPP
#define BOOST_NUMERIC_INTERVAL_COMPARE_POSSIBLE_HPP

#include <boost/numeric/interval/detail/interval_prototype.hpp>
#include <boost/numeric/interval/detail/test_input.hpp>

namespace boost {
namespace numeric {
namespace interval_lib {
namespace compare {
namespace possible {

template <class T, class Policies1, class Policies2>
inline bool operator<(const interval<T, Policies1> &x, const interval<T, Policies2> &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() < y.upper();
}

template <class T, class Policies> inline bool operator<(const interval<T, Policies> &x, const T &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() < y;
}

template <class T, class Policies1, class Policies2>
inline bool operator<=(const interval<T, Policies1> &x, const interval<T, Policies2> &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() <= y.upper();
}

template <class T, class Policies> inline bool operator<=(const interval<T, Policies> &x, const T &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() <= y;
}

template <class T, class Policies1, class Policies2>
inline bool operator>(const interval<T, Policies1> &x, const interval<T, Policies2> &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.upper() > y.lower();
}

template <class T, class Policies> inline bool operator>(const interval<T, Policies> &x, const T &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.upper() > y;
}

template <class T, class Policies1, class Policies2>
inline bool operator>=(const interval<T, Policies1> &x, const interval<T, Policies2> &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.upper() >= y.lower();
}

template <class T, class Policies> inline bool operator>=(const interval<T, Policies> &x, const T &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.upper() >= y;
}

template <class T, class Policies1, class Policies2>
inline bool operator==(const interval<T, Policies1> &x, const interval<T, Policies2> &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() <= y.upper() && x.upper() >= y.lower();
}

template <class T, class Policies> inline bool operator==(const interval<T, Policies> &x, const T &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() <= y && x.upper() >= y;
}

template <class T, class Policies1, class Policies2>
inline bool operator!=(const interval<T, Policies1> &x, const interval<T, Policies2> &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() != y.upper() || x.upper() != y.lower();
}

template <class T, class Policies> inline bool operator!=(const interval<T, Policies> &x, const T &y)
{
    if (detail::test_input(x, y))
        throw comparison_error();
    return x.lower() != y || x.upper() != y;
}

} // namespace possible
} // namespace compare
} // namespace interval_lib
} // namespace numeric
} // namespace boost


#endif // BOOST_NUMERIC_INTERVAL_COMPARE_POSSIBLE_HPP
