1 // nonstandard construct and destroy functions -*- C++ -*-
3 // Copyright (C) 2001 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
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18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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
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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
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33 * Hewlett-Packard Company
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44 * Copyright (c) 1996,1997
45 * Silicon Graphics Computer Systems, Inc.
47 * Permission to use, copy, modify, distribute and sell this software
48 * and its documentation for any purpose is hereby granted without fee,
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56 /* NOTE: This is an internal header file, included by other STL headers.
57 * You should not attempt to use it directly.
60 #ifndef _CPP_BITS_STL_CONSTRUCT_H
61 #define _CPP_BITS_STL_CONSTRUCT_H 1
63 #include <bits/type_traits.h>
69 * Invoke an allocated object's constructor with an initializer.
71 * This function is not part of the C++ standard but is used internally
74 template <class _T1, class _T2>
76 _Construct(_T1* __p, const _T2& __value)
77 { new (static_cast<void*>(__p)) _T1(__value); }
80 * Invoke an allocated object's constructor without an initializer.
82 * This function is not part of the C++ standard but is used internally
88 { new (static_cast<void*>(__p)) _T1(); }
91 * Destroy a range of objects with nontrivial destructors.
93 * This is a helper function used only by _Destroy().
95 template <class _ForwardIterator>
97 __destroy_aux(_ForwardIterator __first, _ForwardIterator __last, __false_type)
98 { for ( ; __first != __last; ++__first) _Destroy(&*__first); }
101 * Destroy a range of objects with trivial destructors. Since the destructors
102 * are trivial, there's nothing to do and hopefully this function will be
103 * entirely optimized away.
105 * This is a helper function used only by _Destroy().
107 template <class _ForwardIterator>
109 __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type)
113 * Destroy the object pointed to by a pointer type.
115 * This function is not part of the C++ standard but is used internally
116 * within the library.
120 _Destroy(_Tp* __pointer)
121 { __pointer->~_Tp(); }
124 * Destroy a range of objects. If the value_type of the object has
125 * a trivial destructor, the compiler should optimize all of this
126 * away, otherwise the objects' destructors must be invoked.
128 * This function is not part of the C++ standard but is used internally
129 * within the library.
131 template <class _ForwardIterator>
133 _Destroy(_ForwardIterator __first, _ForwardIterator __last)
135 typedef typename iterator_traits<_ForwardIterator>::value_type
137 typedef typename __type_traits<_Value_type>::has_trivial_destructor
138 _Has_trivial_destructor;
140 __destroy_aux(__first, __last, _Has_trivial_destructor());
144 #endif /* _CPP_BITS_STL_CONSTRUCT_H */