boost/numeric/odeint/algebra/detail/extract_value_type.hpp
/*
[auto_generated]
boost/numeric/odeint/algebra/detail/extract_value_type.hpp
[begin_description]
Extract true value type from complex types (eg. std::complex)
[end_description]
Copyright 2013 Karsten Ahnert
Copyright 2013 Mario Mulansky
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_ODEINT_ALGEBRA_DETAIL_EXTRACT_VALUE_TYPE_HPP_INCLUDED
#define BOOST_NUMERIC_ODEINT_ALGEBRA_DETAIL_EXTRACT_VALUE_TYPE_HPP_INCLUDED
#include <boost/utility.hpp>
#include <boost/mpl/has_xxx.hpp>
BOOST_MPL_HAS_XXX_TRAIT_DEF(value_type)
namespace boost {
namespace numeric {
namespace odeint {
namespace detail {
template< typename S , typename Enabler = void >
struct extract_value_type {};
// as long as value_types are defined we go down the value_type chain
// e.g. returning S::value_type::value_type::value_type
template< typename S >
struct extract_value_type<S , typename boost::disable_if< has_value_type<S> >::type >
{
// no value_type defined, return S
typedef S type;
};
template< typename S >
struct extract_value_type< S , typename boost::enable_if< has_value_type<S> >::type >
{
// go down the value_type
typedef typename extract_value_type< typename S::value_type >::type type;
};
} } } }
#endif