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OS/2 Shareware BBS: 10 Tools
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stlpt453.zip
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STLport-4.5.3
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stlport
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stl
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_auto_ptr.h
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C/C++ Source or Header
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2001-11-09
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3KB
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130 lines
/*
* Copyright (c) 1997-1999
* Silicon Graphics Computer Systems, Inc.
*
* Copyright (c) 1999
* Boris Fomitchev
*
* This material is provided "as is", with absolutely no warranty expressed
* or implied. Any use is at your own risk.
*
* Permission to use or copy this software for any purpose is hereby granted
* without fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
*/
#ifndef _STLP_AUTO_PTR_H
# define _STLP_AUTO_PTR_H
_STLP_BEGIN_NAMESPACE
// implementation primitive
class __ptr_base {
public:
void* _M_p;
void __set(const void* p) { _M_p = __CONST_CAST(void*,p); }
void __set(void* p) { _M_p = p; }
};
template <class _Tp> class auto_ptr_ref {
public:
__ptr_base& _M_r;
_Tp* const _M_p;
auto_ptr_ref(__ptr_base& __r, _Tp* __p) : _M_r(__r), _M_p(__p) { }
_Tp* release() const { _M_r.__set((void*)0); return _M_p; }
};
template<class _Tp> struct auto_ptr : public __ptr_base {
typedef _Tp element_type;
typedef auto_ptr<_Tp> _Self;
_Tp* release() {
_Tp* __px = this->get();
this->_M_p = 0;
return __px;
}
void reset(_Tp* __px=0) {
_Tp* __pt = this->get();
if (__px != __pt)
delete __pt;
this->__set(__px);
}
_Tp* get() const { return __REINTERPRET_CAST(_Tp*,__CONST_CAST(void*,_M_p)); }
# if !defined (_STLP_NO_ARROW_OPERATOR)
_Tp* operator->() const {
_STLP_VERBOSE_ASSERT(get()!=0, _StlMsg_AUTO_PTR_NULL)
return get();
}
# endif
_Tp& operator*() const {
_STLP_VERBOSE_ASSERT(get()!=0, _StlMsg_AUTO_PTR_NULL)
return *get();
}
auto_ptr() { this->_M_p = 0; }
explicit auto_ptr(_Tp* __px) { this->__set(__px); }
#if defined (_STLP_MEMBER_TEMPLATES)
# if !defined (_STLP_NO_TEMPLATE_CONVERSIONS)
template<class _Tp1> auto_ptr(auto_ptr<_Tp1>& __r) {
_Tp* __conversionCheck = __r.release();
this->__set(__conversionCheck);
}
# endif
template<class _Tp1> auto_ptr<_Tp>& operator=(auto_ptr<_Tp1>& __r) {
_Tp* __conversionCheck = __r.release();
reset(__conversionCheck);
return *this;
}
#endif /* _STLP_MEMBER_TEMPLATES */
auto_ptr(_Self& __r) { this->__set(__r.release()); }
_Self& operator=(_Self& __r) {
reset(__r.release());
return *this;
}
~auto_ptr() { /* boris : reset(0) might be better */ delete this->get(); }
auto_ptr(auto_ptr_ref<_Tp> __r) {
this->__set(__r.release());
}
_Self& operator=(auto_ptr_ref<_Tp> __r) {
reset(__r.release());
return *this;
}
# if defined(_STLP_MEMBER_TEMPLATES) && !defined(_STLP_NO_TEMPLATE_CONVERSIONS)
template<class _Tp1> operator auto_ptr_ref<_Tp1>() {
return auto_ptr_ref<_Tp1>(*this, this->get());
}
template<class _Tp1> operator auto_ptr<_Tp1>() {
return auto_ptr<_Tp1>(release());
}
# else
operator auto_ptr_ref<_Tp>()
{ return auto_ptr_ref<_Tp>(*this, this->get()); }
# endif
};
_STLP_END_NAMESPACE
#endif /* _STLP_AUTO_PTR_H */
// Local Variables:
// mode:C++
// End: