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STLPORT/stlport/stl/_auto_ptr.h

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+/*
+ * 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> class auto_ptr :  public __ptr_base {
+public:	
+  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:
+