1 /*=============================================================================
2 Copyright (c) 2006-2007 Tobias Schwinger
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 ==============================================================================*/
9 #if !defined(BOOST_FUSION_FUNCTIONAL_ADAPTER_DETAIL_ACCESS_HPP_INCLUDED)
10 #define BOOST_FUSION_FUNCTIONAL_ADAPTER_DETAIL_ACCESS_HPP_INCLUDED
12 namespace boost { namespace fusion { namespace detail
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; };
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; };
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; };
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; };
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; };