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Diffstat (limited to 'contrib/src/boost/container/detail/version_type.hpp')
-rw-r--r-- | contrib/src/boost/container/detail/version_type.hpp | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/contrib/src/boost/container/detail/version_type.hpp b/contrib/src/boost/container/detail/version_type.hpp new file mode 100644 index 0000000..a20b3ee --- /dev/null +++ b/contrib/src/boost/container/detail/version_type.hpp @@ -0,0 +1,110 @@ +////////////////////////////////////////////////////////////////////////////// +// +// (C) Copyright Ion Gaztanaga 2005-2013. 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) +// +// See http://www.boost.org/libs/container for documentation. +// +////////////////////////////////////////////////////////////////////////////// +// +// This code comes from N1953 document by Howard E. Hinnant +// +////////////////////////////////////////////////////////////////////////////// + + +#ifndef BOOST_CONTAINER_DETAIL_VERSION_TYPE_HPP +#define BOOST_CONTAINER_DETAIL_VERSION_TYPE_HPP + +#ifndef BOOST_CONFIG_HPP +# include <boost/config.hpp> +#endif + +#if defined(BOOST_HAS_PRAGMA_ONCE) +# pragma once +#endif + +#include <boost/container/detail/config_begin.hpp> +#include <boost/container/detail/workaround.hpp> + +#include <boost/container/detail/mpl.hpp> +#include <boost/container/detail/type_traits.hpp> + +namespace boost{ +namespace container { +namespace container_detail { + +template <class T, unsigned V> +struct version_type + : public container_detail::integral_constant<unsigned, V> +{ + typedef T type; + + version_type(const version_type<T, 0>&); +}; + +namespace impl{ + +template <class T, + bool = container_detail::is_convertible<version_type<T, 0>, typename T::version>::value> +struct extract_version +{ + static const unsigned value = 1; +}; + +template <class T> +struct extract_version<T, true> +{ + static const unsigned value = T::version::value; +}; + +template <class T> +struct has_version +{ + private: + struct two {char _[2];}; + template <class U> static two test(...); + template <class U> static char test(const typename U::version*); + public: + static const bool value = sizeof(test<T>(0)) == 1; + void dummy(){} +}; + +template <class T, bool = has_version<T>::value> +struct version +{ + static const unsigned value = 1; +}; + +template <class T> +struct version<T, true> +{ + static const unsigned value = extract_version<T>::value; +}; + +} //namespace impl + +template <class T> +struct version + : public container_detail::integral_constant<unsigned, impl::version<T>::value> +{}; + +template<class T, unsigned N> +struct is_version +{ + static const bool value = + is_same< typename version<T>::type, integral_constant<unsigned, N> >::value; +}; + +} //namespace container_detail { + +typedef container_detail::integral_constant<unsigned, 0> version_0; +typedef container_detail::integral_constant<unsigned, 1> version_1; +typedef container_detail::integral_constant<unsigned, 2> version_2; + +} //namespace container { +} //namespace boost{ + +#include <boost/container/detail/config_end.hpp> + +#endif //#define BOOST_CONTAINER_DETAIL_VERSION_TYPE_HPP |