| // -*- C++ -*- |
| /*************************************************************************** |
| * |
| * _ref_wrap.h - reference wrappers for <functional> header |
| * |
| * This is an internal header file used to implement the C++ Standard |
| * Library. It should never be #included directly by a program. |
| * |
| * $Id: _ref_wrap.h 673534 2008-07-02 22:49:15Z elemings $ |
| * |
| *************************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed |
| * with this work for additional information regarding copyright |
| * ownership. The ASF licenses this file to you under the Apache |
| * License, Version 2.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| * implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| * |
| * Copyright 2008 Rogue Wave Software, Inc. |
| * |
| **************************************************************************/ |
| |
| #ifndef _RWSTD_RW_REF_WRAP_INCLUDED |
| # define _RWSTD_RW_REF_WRAP_INCLUDED |
| |
| # include <rw/_defs.h> |
| |
| |
| _RWSTD_NAMESPACE (std) { |
| |
| |
| // 20.5.5, class template reference_wrapper: |
| |
| template <class _TypeT> |
| class reference_wrapper |
| { |
| _TypeT* _C_ptr; |
| |
| public: |
| |
| typedef _TypeT type; |
| |
| reference_wrapper (type& __x) |
| : _C_ptr (&__x) { /* empty */ } |
| |
| reference_wrapper (const reference_wrapper& __x) |
| : _C_ptr (__x._C_ptr) { /* empty */ } |
| |
| reference_wrapper& operator= (const reference_wrapper& __x) { |
| _RWSTD_ASSERT (0 != __x._C_ptr); |
| _C_ptr = __x._C_ptr; |
| return *this; |
| } |
| |
| operator type& () const { |
| _RWSTD_ASSERT (0 != _C_ptr); |
| return *_C_ptr; |
| } |
| |
| type& get() const { |
| _RWSTD_ASSERT (0 != _C_ptr); |
| return *_C_ptr; |
| } |
| }; |
| |
| |
| template <class _TypeT> |
| inline reference_wrapper<_TypeT> |
| ref (_TypeT& __x) |
| { |
| return reference_wrapper<_TypeT> (__x); |
| } |
| |
| template <class _TypeT> |
| inline reference_wrapper<_TypeT> |
| ref (reference_wrapper<_TypeT>& __x) |
| { |
| return reference_wrapper<_TypeT> (__x); |
| } |
| |
| |
| template <class _TypeT> |
| inline reference_wrapper<const _TypeT> |
| cref (const _TypeT& __x) |
| { |
| return reference_wrapper<const _TypeT> (__x); |
| } |
| |
| template <class _TypeT> |
| inline reference_wrapper<const _TypeT> |
| cref (reference_wrapper<const _TypeT>& __x) |
| { |
| return reference_wrapper<const _TypeT> (__x); |
| } |
| |
| |
| } // namespace std |
| |
| |
| #endif // _RWSTD_RW_REF_WRAP_INCLUDED |