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 42