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// Boost.TypeErasure library // // Copyright 2011 Steven Watanabe // // 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) // // $Id$ #ifndef BOOST_TYPE_ERASURE_DERIVED_HPP_INCLUDED #define BOOST_TYPE_ERASURE_DERIVED_HPP_INCLUDED namespace boost { namespace type_erasure { /** * A metafunction which returns the full @ref any type, * when given any of its base classes. This is primarily * intended to be used when implementing @ref concept_interface. * * \see rebind_any, as_param */ template<class T> struct derived { #ifdef BOOST_TYPE_ERASURE_DOXYGEN typedef detail::unspecified type; #else typedef typename T::_boost_type_erasure_derived_type type; #endif }; #ifndef BOOST_NO_CXX11_TEMPLATE_ALIASES template<class T> using derived_t = typename T::_boost_type_erasure_derived_type; #endif } } #endif
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