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//
// Copyright (c) 2009 Rutger ter Borg
//
// 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_BINDINGS_DETAIL_IF_LEFT_HPP
#define BOOST_NUMERIC_BINDINGS_DETAIL_IF_LEFT_HPP
#include <boost/numeric/bindings/tag.hpp>
namespace boost {
namespace numeric {
namespace bindings {
namespace detail {
template< typename Side, typename Left, typename Right >
struct if_left_impl {
typedef Right result_type;
static result_type invoke( Left, Right right ) {
return right;
}
};
template< typename Left, typename Right >
struct if_left_impl< tag::left, Left, Right > {
typedef Left result_type;
static result_type invoke( Left left, Right ) {
return left;
}
};
// by-value
template< typename Side, typename Left, typename Right >
typename if_left_impl< Side, const Left, const Right >::result_type
if_left( const Side, const Left left, const Right right ) {
return if_left_impl< Side, const Left, const Right >::invoke( left, right );
}
} // namespace detail
} // namespace bindings
} // namespace numeric
} // namespace boost
#endif
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