Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / libstdc++-v3 / include / bits / stl_construct.h
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1// nonstandard construct and destroy functions -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING. If not, write to the Free
18// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction. Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License. This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30/*
31 *
32 * Copyright (c) 1994
33 * Hewlett-Packard Company
34 *
35 * Permission to use, copy, modify, distribute and sell this software
36 * and its documentation for any purpose is hereby granted without fee,
37 * provided that the above copyright notice appear in all copies and
38 * that both that copyright notice and this permission notice appear
39 * in supporting documentation. Hewlett-Packard Company makes no
40 * representations about the suitability of this software for any
41 * purpose. It is provided "as is" without express or implied warranty.
42 *
43 *
44 * Copyright (c) 1996,1997
45 * Silicon Graphics Computer Systems, Inc.
46 *
47 * Permission to use, copy, modify, distribute and sell this software
48 * and its documentation for any purpose is hereby granted without fee,
49 * provided that the above copyright notice appear in all copies and
50 * that both that copyright notice and this permission notice appear
51 * in supporting documentation. Silicon Graphics makes no
52 * representations about the suitability of this software for any
53 * purpose. It is provided "as is" without express or implied warranty.
54 */
55
56/** @file stl_construct.h
57 * This is an internal header file, included by other library headers.
58 * You should not attempt to use it directly.
59 */
60
61#ifndef _STL_CONSTRUCT_H
62#define _STL_CONSTRUCT_H 1
63
64#include <bits/type_traits.h>
65#include <new>
66
67namespace std
68{
69 /**
70 * @if maint
71 * Constructs an object in existing memory by invoking an allocated
72 * object's constructor with an initializer.
73 * @endif
74 */
75 template<typename _T1, typename _T2>
76 inline void
77 _Construct(_T1* __p, const _T2& __value)
78 {
79 // _GLIBCXX_RESOLVE_LIB_DEFECTS
80 // 402. wrong new expression in [some_]allocator::construct
81 ::new(static_cast<void*>(__p)) _T1(__value);
82 }
83
84 /**
85 * @if maint
86 * Constructs an object in existing memory by invoking an allocated
87 * object's default constructor (no initializers).
88 * @endif
89 */
90 template<typename _T1>
91 inline void
92 _Construct(_T1* __p)
93 {
94 // _GLIBCXX_RESOLVE_LIB_DEFECTS
95 // 402. wrong new expression in [some_]allocator::construct
96 ::new(static_cast<void*>(__p)) _T1();
97 }
98
99 /**
100 * @if maint
101 * Destroy the object pointed to by a pointer type.
102 * @endif
103 */
104 template<typename _Tp>
105 inline void
106 _Destroy(_Tp* __pointer)
107 { __pointer->~_Tp(); }
108
109 /**
110 * @if maint
111 * Destroy a range of objects with nontrivial destructors.
112 *
113 * This is a helper function used only by _Destroy().
114 * @endif
115 */
116 template<typename _ForwardIterator>
117 inline void
118 __destroy_aux(_ForwardIterator __first, _ForwardIterator __last,
119 __false_type)
120 { for ( ; __first != __last; ++__first) std::_Destroy(&*__first); }
121
122 /**
123 * @if maint
124 * Destroy a range of objects with trivial destructors. Since the destructors
125 * are trivial, there's nothing to do and hopefully this function will be
126 * entirely optimized away.
127 *
128 * This is a helper function used only by _Destroy().
129 * @endif
130 */
131 template<typename _ForwardIterator>
132 inline void
133 __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type)
134 { }
135
136 /**
137 * @if maint
138 * Destroy a range of objects. If the value_type of the object has
139 * a trivial destructor, the compiler should optimize all of this
140 * away, otherwise the objects' destructors must be invoked.
141 * @endif
142 */
143 template<typename _ForwardIterator>
144 inline void
145 _Destroy(_ForwardIterator __first, _ForwardIterator __last)
146 {
147 typedef typename iterator_traits<_ForwardIterator>::value_type
148 _Value_type;
149 typedef typename __type_traits<_Value_type>::has_trivial_destructor
150 _Has_trivial_destructor;
151
152 std::__destroy_aux(__first, __last, _Has_trivial_destructor());
153 }
154} // namespace std
155
156#endif /* _STL_CONSTRUCT_H */
157