boost/icl/type_traits/identity_element.hpp
/*-----------------------------------------------------------------------------+
Copyright (c) 2008-2009: Joachim Faulhaber
+------------------------------------------------------------------------------+
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENCE.txt or copy at
http://www.boost.org/LICENSE_1_0.txt)
+-----------------------------------------------------------------------------*/
#ifndef BOOST_ICL_TYPE_TRAITS_IDENTITY_ELEMENT_HPP_JOFA_080912
#define BOOST_ICL_TYPE_TRAITS_IDENTITY_ELEMENT_HPP_JOFA_080912
#include <boost/icl/type_traits/type_to_string.hpp>
namespace boost{ namespace icl
{
template <class Type> struct identity_element
{
static Type value();
Type operator()()const { return value(); }
};
template <class Type>
inline Type identity_element<Type>::value()
{
static Type _value;
return _value;
}
template<>
inline std::string unary_template_to_string<identity_element>::apply() { return "0"; }
}} // namespace boost icl
#endif