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1 | /* Copyright 2003-2015 Joaquin M Lopez Munoz. |
2 | * Distributed under the Boost Software License, Version 1.0. | |
3 | * (See accompanying file LICENSE_1_0.txt or copy at | |
4 | * http://www.boost.org/LICENSE_1_0.txt) | |
5 | * | |
6 | * See http://www.boost.org/libs/multi_index for library home page. | |
7 | */ | |
8 | ||
9 | #ifndef BOOST_MULTI_INDEX_DETAIL_RAW_PTR_HPP | |
10 | #define BOOST_MULTI_INDEX_DETAIL_RAW_PTR_HPP | |
11 | ||
12 | #if defined(_MSC_VER) | |
13 | #pragma once | |
14 | #endif | |
15 | ||
16 | #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ | |
17 | #include <boost/mpl/bool.hpp> | |
18 | #include <boost/type_traits/is_same.hpp> | |
19 | ||
20 | namespace boost{ | |
21 | ||
22 | namespace multi_index{ | |
23 | ||
24 | namespace detail{ | |
25 | ||
26 | /* gets the underlying pointer of a pointer-like value */ | |
27 | ||
28 | template<typename RawPointer> | |
29 | inline RawPointer raw_ptr(RawPointer const& p,mpl::true_) | |
30 | { | |
31 | return p; | |
32 | } | |
33 | ||
34 | template<typename RawPointer,typename Pointer> | |
35 | inline RawPointer raw_ptr(Pointer const& p,mpl::false_) | |
36 | { | |
37 | return p==Pointer(0)?0:&*p; | |
38 | } | |
39 | ||
40 | template<typename RawPointer,typename Pointer> | |
41 | inline RawPointer raw_ptr(Pointer const& p) | |
42 | { | |
43 | return raw_ptr<RawPointer>(p,is_same<RawPointer,Pointer>()); | |
44 | } | |
45 | ||
46 | } /* namespace multi_index::detail */ | |
47 | ||
48 | } /* namespace multi_index */ | |
49 | ||
50 | } /* namespace boost */ | |
51 | ||
52 | #endif |