ceph/src/boost/boost/local_function/aux_/add_pointed_const.hpp

   1
   2 // Copyright (C) 2009-2012 Lorenzo Caminiti
   3 // Distributed under the Boost Software License, Version 1.0
   4 // (see accompanying file LICENSE_1_0.txt or a copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6 // Home at http://www.boost.org/libs/local_function
   7
   8 #ifndef BOOST_LOCAL_FUNCTION_AUX_ADD_POINTED_CONST_HPP_
   9 #define BOOST_LOCAL_FUNCTION_AUX_ADD_POINTED_CONST_HPP_
  10
  11 namespace boost { namespace local_function { namespace aux {
  12
  13 // Metafunction to add const to pointed type `T` (i.e. converts
  14 // `T* [const]` to `T const* [const]`). `boost::add_const<>` cannot be used
  15 // instead because only adds outer const.
  16
  17 template<typename T> struct add_pointed_const { typedef T type; };
  18
  19 template<typename T> struct add_pointed_const<T*> { typedef T const* type; };
  20
  21 template<typename T> struct add_pointed_const<T const*>
  22     { typedef T const* type; };
  23
  24 template<typename T> struct add_pointed_const<T* const>
  25     { typedef T const* const type; };
  26
  27 template<typename T> struct add_pointed_const<T const* const>
  28     { typedef T const* const type; };
  29
  30 } } } // namespace
  31
  32 #endif //#include guard
  33