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Diffstat (limited to 'boost/local_function/aux_/add_pointed_const.hpp')
-rw-r--r-- | boost/local_function/aux_/add_pointed_const.hpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/boost/local_function/aux_/add_pointed_const.hpp b/boost/local_function/aux_/add_pointed_const.hpp new file mode 100644 index 0000000000..9cd7aa6375 --- /dev/null +++ b/boost/local_function/aux_/add_pointed_const.hpp @@ -0,0 +1,33 @@ + +// Copyright (C) 2009-2012 Lorenzo Caminiti +// Distributed under the Boost Software License, Version 1.0 +// (see accompanying file LICENSE_1_0.txt or a copy at +// http://www.boost.org/LICENSE_1_0.txt) +// Home at http://www.boost.org/libs/local_function + +#ifndef BOOST_LOCAL_FUNCTION_AUX_ADD_POINTED_CONST_HPP_ +#define BOOST_LOCAL_FUNCTION_AUX_ADD_POINTED_CONST_HPP_ + +namespace boost { namespace local_function { namespace aux { + +// Metafunction to add const to pointed type `T` (i.e. converts +// `T* [const]` to `T const* [const]`). `boost::add_const<>` cannot be used +// instead because only adds outer const. + +template<typename T> struct add_pointed_const { typedef T type; }; + +template<typename T> struct add_pointed_const<T*> { typedef T const* type; }; + +template<typename T> struct add_pointed_const<T const*> + { typedef T const* type; }; + +template<typename T> struct add_pointed_const<T* const> + { typedef T const* const type; }; + +template<typename T> struct add_pointed_const<T const* const> + { typedef T const* const type; }; + +} } } // namespace + +#endif //#include guard + |