ceph/src/boost/boost/fusion/functional/adapter/detail/access.hpp

   1 /*=============================================================================
   2     Copyright (c) 2006-2007 Tobias Schwinger
   3
   4     Use modification and distribution are subject to the Boost Software
   5     License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6     http://www.boost.org/LICENSE_1_0.txt).
   7 ==============================================================================*/
   8
   9 #if !defined(BOOST_FUSION_FUNCTIONAL_ADAPTER_DETAIL_ACCESS_HPP_INCLUDED)
  10 #define BOOST_FUSION_FUNCTIONAL_ADAPTER_DETAIL_ACCESS_HPP_INCLUDED
  11
  12 namespace boost { namespace fusion { namespace detail
  13 {
  14     // const reference deduction for function templates that accept T const &
  15     template <typename T> struct cref               { typedef T const& type; };
  16     template <typename T> struct cref<T&>           { typedef T const& type; };
  17     template <typename T> struct cref<T const>      { typedef T const& type; };
  18
  19     // mutable reference deduction for function templates that accept T &
  20     template <typename T> struct mref               { typedef T      & type; };
  21     template <typename T> struct mref<T&>           { typedef T      & type; };
  22
  23     // generic reference deduction for function templates that are overloaded
  24     // to accept both T const & and T &
  25     template <typename T> struct gref               { typedef T const& type; };
  26     template <typename T> struct gref<T&>           { typedef T      & type; };
  27     template <typename T> struct gref<T const>      { typedef T const& type; };
  28
  29     // appropriately qualified target function in const context
  30     template <typename T> struct qf_c          { typedef T const  type; };
  31     template <typename T> struct qf_c<T const> { typedef T const  type; };
  32     template <typename T> struct qf_c<T &>     { typedef T        type; };
  33
  34     // appropriately qualified target function in non-const context
  35     template <typename T> struct qf            { typedef T        type; };
  36     template <typename T> struct qf<T const>   { typedef T const  type; };
  37     template <typename T> struct qf<T &>       { typedef T        type; };
  38 }}}
  39
  40 #endif
  41