diff options
Diffstat (limited to 'src/third_party/boost-1.69.0/boost/mpl/tag.hpp')
-rw-r--r-- | src/third_party/boost-1.69.0/boost/mpl/tag.hpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/mpl/tag.hpp b/src/third_party/boost-1.69.0/boost/mpl/tag.hpp new file mode 100644 index 00000000000..858627753d8 --- /dev/null +++ b/src/third_party/boost-1.69.0/boost/mpl/tag.hpp @@ -0,0 +1,52 @@ + +#ifndef BOOST_MPL_TAG_HPP_INCLUDED +#define BOOST_MPL_TAG_HPP_INCLUDED + +// Copyright Aleksey Gurtovoy 2004 +// +// 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/mpl for documentation. + +// $Id$ +// $Date$ +// $Revision$ + +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/void.hpp> +#include <boost/mpl/aux_/has_tag.hpp> +#include <boost/mpl/aux_/config/eti.hpp> + +namespace boost { namespace mpl { + +namespace aux { +template< typename T > struct tag_impl +{ + typedef typename T::tag type; +}; +} + +template< typename T, typename Default = void_ > struct tag +#if !defined(BOOST_MPL_CFG_MSVC_ETI_BUG) + : if_< + aux::has_tag<T> + , aux::tag_impl<T> + , Default + >::type +{ +#else +{ + typedef typename eval_if< + aux::has_tag<T> + , aux::tag_impl<T> + , Default + >::type type; + +#endif +}; + +}} + +#endif // BOOST_MPL_TAG_HPP_INCLUDED |