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1 | /*-----------------------------------------------------------------------------+ |
2 | Copyright (c) 2008-2009: Joachim Faulhaber | |
3 | +------------------------------------------------------------------------------+ | |
4 | Distributed under the Boost Software License, Version 1.0. | |
5 | (See accompanying file LICENCE.txt or copy at | |
6 | http://www.boost.org/LICENSE_1_0.txt) | |
7 | +-----------------------------------------------------------------------------*/ | |
8 | #ifndef BOOST_ICL_TYPE_TRAITS_IDENTITY_ELEMENT_HPP_JOFA_080912 | |
9 | #define BOOST_ICL_TYPE_TRAITS_IDENTITY_ELEMENT_HPP_JOFA_080912 | |
10 | ||
11 | #include <boost/icl/type_traits/type_to_string.hpp> | |
12 | ||
13 | namespace boost{ namespace icl | |
14 | { | |
15 | template <class Type> struct identity_element | |
16 | { | |
17 | static Type value(); | |
18 | Type operator()()const { return value(); } | |
19 | }; | |
20 | ||
21 | template <class Type> | |
22 | inline Type identity_element<Type>::value() | |
23 | { | |
24 | static Type _value; | |
25 | return _value; | |
26 | } | |
27 | ||
28 | template<> | |
29 | inline std::string unary_template_to_string<identity_element>::apply() { return "0"; } | |
30 | ||
31 | }} // namespace boost icl | |
32 | ||
33 | #endif | |
34 | ||
35 |