mips-qca-linux-uclibc/include/c++/4.6.4/backward/auto_ptr.h - toolchains/windcharger - Git at Google

 // auto_ptr implementation -*- C++ -*-

 // Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
 // terms of the GNU General Public License as published by the
 // Free Software Foundation; either version 3, or (at your option)
 // any later version.

 // This library is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 // GNU General Public License for more details.

 // Under Section 7 of GPL version 3, you are granted additional
 // permissions described in the GCC Runtime Library Exception, version
 // 3.1, as published by the Free Software Foundation.

 // You should have received a copy of the GNU General Public License and
 // a copy of the GCC Runtime Library Exception along with this program;
 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 // <http://www.gnu.org/licenses/>.

 /** @file backward/auto_ptr.h
  *  This is an internal header file, included by other library headers.
  *  Do not attempt to use it directly. @headername{memory}
  */

 #ifndef _BACKWARD_AUTO_PTR_H
 #define _BACKWARD_AUTO_PTR_H 1

 #include <bits/c++config.h>
 #include <debug/debug.h>

 namespace std _GLIBCXX_VISIBILITY(default)
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION

   /**
    *  A wrapper class to provide auto_ptr with reference semantics.
    *  For example, an auto_ptr can be assigned (or constructed from)
    *  the result of a function which returns an auto_ptr by value.
    *
    *  All the auto_ptr_ref stuff should happen behind the scenes.
    */
   template<typename _Tp1>
     struct auto_ptr_ref
     {
       _Tp1* _M_ptr;

       explicit
       auto_ptr_ref(_Tp1* __p): _M_ptr(__p) { }
     } _GLIBCXX_DEPRECATED;


   /**
    *  @brief  A simple smart pointer providing strict ownership semantics.
    *
    *  The Standard says:
    *  <pre>
    *  An @c auto_ptr owns the object it holds a pointer to.  Copying
    *  an @c auto_ptr copies the pointer and transfers ownership to the
    *  destination.  If more than one @c auto_ptr owns the same object
    *  at the same time the behavior of the program is undefined.
    *
    *  The uses of @c auto_ptr include providing temporary
    *  exception-safety for dynamically allocated memory, passing
    *  ownership of dynamically allocated memory to a function, and
    *  returning dynamically allocated memory from a function.  @c
    *  auto_ptr does not meet the CopyConstructible and Assignable
    *  requirements for Standard Library <a
    *  href="tables.html#65">container</a> elements and thus
    *  instantiating a Standard Library container with an @c auto_ptr
    *  results in undefined behavior.
    *  </pre>
    *  Quoted from [20.4.5]/3.
    *
    *  Good examples of what can and cannot be done with auto_ptr can
    *  be found in the libstdc++ testsuite.
    *
    *  _GLIBCXX_RESOLVE_LIB_DEFECTS
    *  127.  auto_ptr<> conversion issues
    *  These resolutions have all been incorporated.
    */
   template<typename _Tp>
     class auto_ptr
     {
     private:
       _Tp* _M_ptr;

     public:
       /// The pointed-to type.
       typedef _Tp element_type;

       /**
        *  @brief  An %auto_ptr is usually constructed from a raw pointer.
        *  @param  p  A pointer (defaults to NULL).
        *
        *  This object now @e owns the object pointed to by @a p.
        */
       explicit
       auto_ptr(element_type* __p = 0) throw() : _M_ptr(__p) { }

       /**
        *  @brief  An %auto_ptr can be constructed from another %auto_ptr.
        *  @param  a  Another %auto_ptr of the same type.
        *
        *  This object now @e owns the object previously owned by @a a,
        *  which has given up ownership.
        */
       auto_ptr(auto_ptr& __a) throw() : _M_ptr(__a.release()) { }

       /**
        *  @brief  An %auto_ptr can be constructed from another %auto_ptr.
        *  @param  a  Another %auto_ptr of a different but related type.
        *
        *  A pointer-to-Tp1 must be convertible to a
        *  pointer-to-Tp/element_type.
        *
        *  This object now @e owns the object previously owned by @a a,
        *  which has given up ownership.
        */
       template<typename _Tp1>
         auto_ptr(auto_ptr<_Tp1>& __a) throw() : _M_ptr(__a.release()) { }

       /**
        *  @brief  %auto_ptr assignment operator.
        *  @param  a  Another %auto_ptr of the same type.
        *
        *  This object now @e owns the object previously owned by @a a,
        *  which has given up ownership.  The object that this one @e
        *  used to own and track has been deleted.
        */
       auto_ptr&
       operator=(auto_ptr& __a) throw()
       {
 	reset(__a.release());
 	return *this;
       }

       /**
        *  @brief  %auto_ptr assignment operator.
        *  @param  a  Another %auto_ptr of a different but related type.
        *
        *  A pointer-to-Tp1 must be convertible to a pointer-to-Tp/element_type.
        *
        *  This object now @e owns the object previously owned by @a a,
        *  which has given up ownership.  The object that this one @e
        *  used to own and track has been deleted.
        */
       template<typename _Tp1>
         auto_ptr&
         operator=(auto_ptr<_Tp1>& __a) throw()
         {
 	  reset(__a.release());
 	  return *this;
 	}

       /**
        *  When the %auto_ptr goes out of scope, the object it owns is
        *  deleted.  If it no longer owns anything (i.e., @c get() is
        *  @c NULL), then this has no effect.
        *
        *  The C++ standard says there is supposed to be an empty throw
        *  specification here, but omitting it is standard conforming.  Its
        *  presence can be detected only if _Tp::~_Tp() throws, but this is
        *  prohibited.  [17.4.3.6]/2
        */
       ~auto_ptr() { delete _M_ptr; }

       /**
        *  @brief  Smart pointer dereferencing.
        *
        *  If this %auto_ptr no longer owns anything, then this
        *  operation will crash.  (For a smart pointer, <em>no longer owns
        *  anything</em> is the same as being a null pointer, and you know
        *  what happens when you dereference one of those...)
        */
       element_type&
       operator*() const throw()
       {
 	_GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
 	return *_M_ptr;
       }

       /**
        *  @brief  Smart pointer dereferencing.
        *
        *  This returns the pointer itself, which the language then will
        *  automatically cause to be dereferenced.
        */
       element_type*
       operator->() const throw()
       {
 	_GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
 	return _M_ptr;
       }

       /**
        *  @brief  Bypassing the smart pointer.
        *  @return  The raw pointer being managed.
        *
        *  You can get a copy of the pointer that this object owns, for
        *  situations such as passing to a function which only accepts
        *  a raw pointer.
        *
        *  @note  This %auto_ptr still owns the memory.
        */
       element_type*
       get() const throw() { return _M_ptr; }

       /**
        *  @brief  Bypassing the smart pointer.
        *  @return  The raw pointer being managed.
        *
        *  You can get a copy of the pointer that this object owns, for
        *  situations such as passing to a function which only accepts
        *  a raw pointer.
        *
        *  @note  This %auto_ptr no longer owns the memory.  When this object
        *  goes out of scope, nothing will happen.
        */
       element_type*
       release() throw()
       {
 	element_type* __tmp = _M_ptr;
 	_M_ptr = 0;
 	return __tmp;
       }

       /**
        *  @brief  Forcibly deletes the managed object.
        *  @param  p  A pointer (defaults to NULL).
        *
        *  This object now @e owns the object pointed to by @a p.  The
        *  previous object has been deleted.
        */
       void
       reset(element_type* __p = 0) throw()
       {
 	if (__p != _M_ptr)
 	  {
 	    delete _M_ptr;
 	    _M_ptr = __p;
 	  }
       }

       /**
        *  @brief  Automatic conversions
        *
        *  These operations convert an %auto_ptr into and from an auto_ptr_ref
        *  automatically as needed.  This allows constructs such as
        *  @code
        *    auto_ptr<Derived>  func_returning_auto_ptr(.....);
        *    ...
        *    auto_ptr<Base> ptr = func_returning_auto_ptr(.....);
        *  @endcode
        */
       auto_ptr(auto_ptr_ref<element_type> __ref) throw()
       : _M_ptr(__ref._M_ptr) { }

       auto_ptr&
       operator=(auto_ptr_ref<element_type> __ref) throw()
       {
 	if (__ref._M_ptr != this->get())
 	  {
 	    delete _M_ptr;
 	    _M_ptr = __ref._M_ptr;
 	  }
 	return *this;
       }

       template<typename _Tp1>
         operator auto_ptr_ref<_Tp1>() throw()
         { return auto_ptr_ref<_Tp1>(this->release()); }

       template<typename _Tp1>
         operator auto_ptr<_Tp1>() throw()
         { return auto_ptr<_Tp1>(this->release()); }
     } _GLIBCXX_DEPRECATED;

   // _GLIBCXX_RESOLVE_LIB_DEFECTS
   // 541. shared_ptr template assignment and void
   template<>
     class auto_ptr<void>
     {
     public:
       typedef void element_type;
     } _GLIBCXX_DEPRECATED;

 _GLIBCXX_END_NAMESPACE_VERSION
 } // namespace

 #endif /* _BACKWARD_AUTO_PTR_H */
	// auto_ptr implementation -- C++ --

	// Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
	//
	// This file is part of the GNU ISO C++ Library. This library is free
	// software; you can redistribute it and/or modify it under the
	// terms of the GNU General Public License as published by the
	// Free Software Foundation; either version 3, or (at your option)
	// any later version.

	// This library is distributed in the hope that it will be useful,
	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	// GNU General Public License for more details.

	// Under Section 7 of GPL version 3, you are granted additional
	// permissions described in the GCC Runtime Library Exception, version
	// 3.1, as published by the Free Software Foundation.

	// You should have received a copy of the GNU General Public License and
	// a copy of the GCC Runtime Library Exception along with this program;
	// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	// <http://www.gnu.org/licenses/>.

	/** @file backward/auto_ptr.h
	* This is an internal header file, included by other library headers.
	* Do not attempt to use it directly. @headername{memory}
	*/

	#ifndef _BACKWARD_AUTO_PTR_H
	#define _BACKWARD_AUTO_PTR_H 1

	#include <bits/c++config.h>
	#include <debug/debug.h>

	namespace std _GLIBCXX_VISIBILITY(default)
	{
	_GLIBCXX_BEGIN_NAMESPACE_VERSION

	/**
	* A wrapper class to provide auto_ptr with reference semantics.
	* For example, an auto_ptr can be assigned (or constructed from)
	* the result of a function which returns an auto_ptr by value.
	*
	* All the auto_ptr_ref stuff should happen behind the scenes.
	*/
	template<typename _Tp1>
	struct auto_ptr_ref
	{
	_Tp1* _M_ptr;

	explicit
	auto_ptr_ref(_Tp1* __p): _M_ptr(__p) { }
	} _GLIBCXX_DEPRECATED;


	/**
	* @brief A simple smart pointer providing strict ownership semantics.
	*
	* The Standard says:
	* <pre>
	* An @c auto_ptr owns the object it holds a pointer to. Copying
	* an @c auto_ptr copies the pointer and transfers ownership to the
	* destination. If more than one @c auto_ptr owns the same object
	* at the same time the behavior of the program is undefined.
	*
	* The uses of @c auto_ptr include providing temporary
	* exception-safety for dynamically allocated memory, passing
	* ownership of dynamically allocated memory to a function, and
	* returning dynamically allocated memory from a function. @c
	* auto_ptr does not meet the CopyConstructible and Assignable
	* requirements for Standard Library <a
	* href="tables.html#65">container</a> elements and thus
	* instantiating a Standard Library container with an @c auto_ptr
	* results in undefined behavior.
	* </pre>
	* Quoted from [20.4.5]/3.
	*
	* Good examples of what can and cannot be done with auto_ptr can
	* be found in the libstdc++ testsuite.
	*
	* _GLIBCXX_RESOLVE_LIB_DEFECTS
	* 127. auto_ptr<> conversion issues
	* These resolutions have all been incorporated.
	*/
	template<typename _Tp>
	class auto_ptr
	{
	private:
	_Tp* _M_ptr;

	public:
	/// The pointed-to type.
	typedef _Tp element_type;

	/**
	* @brief An %auto_ptr is usually constructed from a raw pointer.
	* @param p A pointer (defaults to NULL).
	*
	* This object now @e owns the object pointed to by @a p.
	*/
	explicit
	auto_ptr(element_type* __p = 0) throw() : _M_ptr(__p) { }

	/**
	* @brief An %auto_ptr can be constructed from another %auto_ptr.
	* @param a Another %auto_ptr of the same type.
	*
	* This object now @e owns the object previously owned by @a a,
	* which has given up ownership.
	*/
	auto_ptr(auto_ptr& __a) throw() : _M_ptr(__a.release()) { }

	/**
	* @brief An %auto_ptr can be constructed from another %auto_ptr.
	* @param a Another %auto_ptr of a different but related type.
	*
	* A pointer-to-Tp1 must be convertible to a
	* pointer-to-Tp/element_type.
	*
	* This object now @e owns the object previously owned by @a a,
	* which has given up ownership.
	*/
	template<typename _Tp1>
	auto_ptr(auto_ptr<_Tp1>& __a) throw() : _M_ptr(__a.release()) { }

	/**
	* @brief %auto_ptr assignment operator.
	* @param a Another %auto_ptr of the same type.
	*
	* This object now @e owns the object previously owned by @a a,
	* which has given up ownership. The object that this one @e
	* used to own and track has been deleted.
	*/
	auto_ptr&
	operator=(auto_ptr& __a) throw()
	{
	reset(__a.release());
	return *this;
	}

	/**
	* @brief %auto_ptr assignment operator.
	* @param a Another %auto_ptr of a different but related type.
	*
	* A pointer-to-Tp1 must be convertible to a pointer-to-Tp/element_type.
	*
	* This object now @e owns the object previously owned by @a a,
	* which has given up ownership. The object that this one @e
	* used to own and track has been deleted.
	*/
	template<typename _Tp1>
	auto_ptr&
	operator=(auto_ptr<_Tp1>& __a) throw()
	{
	reset(__a.release());
	return *this;
	}

	/**
	* When the %auto_ptr goes out of scope, the object it owns is
	* deleted. If it no longer owns anything (i.e., @c get() is
	* @c NULL), then this has no effect.
	*
	* The C++ standard says there is supposed to be an empty throw
	* specification here, but omitting it is standard conforming. Its
	* presence can be detected only if _Tp::~_Tp() throws, but this is
	* prohibited. [17.4.3.6]/2
	*/
	~auto_ptr() { delete _M_ptr; }

	/**
	* @brief Smart pointer dereferencing.
	*
	* If this %auto_ptr no longer owns anything, then this
	* operation will crash. (For a smart pointer, <em>no longer owns
	* anything</em> is the same as being a null pointer, and you know
	* what happens when you dereference one of those...)
	*/
	element_type&
	operator*() const throw()
	{
	_GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
	return *_M_ptr;
	}

	/**
	* @brief Smart pointer dereferencing.
	*
	* This returns the pointer itself, which the language then will
	* automatically cause to be dereferenced.
	*/
	element_type*
	operator->() const throw()
	{
	_GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
	return _M_ptr;
	}

	/**
	* @brief Bypassing the smart pointer.
	* @return The raw pointer being managed.
	*
	* You can get a copy of the pointer that this object owns, for
	* situations such as passing to a function which only accepts
	* a raw pointer.
	*
	* @note This %auto_ptr still owns the memory.
	*/
	element_type*
	get() const throw() { return _M_ptr; }

	/**
	* @brief Bypassing the smart pointer.
	* @return The raw pointer being managed.
	*
	* You can get a copy of the pointer that this object owns, for
	* situations such as passing to a function which only accepts
	* a raw pointer.
	*
	* @note This %auto_ptr no longer owns the memory. When this object
	* goes out of scope, nothing will happen.
	*/
	element_type*
	release() throw()
	{
	element_type* __tmp = _M_ptr;
	_M_ptr = 0;
	return __tmp;
	}

	/**
	* @brief Forcibly deletes the managed object.
	* @param p A pointer (defaults to NULL).
	*
	* This object now @e owns the object pointed to by @a p. The
	* previous object has been deleted.
	*/
	void
	reset(element_type* __p = 0) throw()
	{
	if (__p != _M_ptr)
	{
	delete _M_ptr;
	_M_ptr = __p;
	}
	}

	/**
	* @brief Automatic conversions
	*
	* These operations convert an %auto_ptr into and from an auto_ptr_ref
	* automatically as needed. This allows constructs such as
	* @code
	* auto_ptr<Derived> func_returning_auto_ptr(.....);
	* ...
	* auto_ptr<Base> ptr = func_returning_auto_ptr(.....);
	* @endcode
	*/
	auto_ptr(auto_ptr_ref<element_type> __ref) throw()
	: _M_ptr(__ref._M_ptr) { }

	auto_ptr&
	operator=(auto_ptr_ref<element_type> __ref) throw()
	{
	if (__ref._M_ptr != this->get())
	{
	delete _M_ptr;
	_M_ptr = __ref._M_ptr;
	}
	return *this;
	}

	template<typename _Tp1>
	operator auto_ptr_ref<_Tp1>() throw()
	{ return auto_ptr_ref<_Tp1>(this->release()); }

	template<typename _Tp1>
	operator auto_ptr<_Tp1>() throw()
	{ return auto_ptr<_Tp1>(this->release()); }
	} _GLIBCXX_DEPRECATED;

	// _GLIBCXX_RESOLVE_LIB_DEFECTS
	// 541. shared_ptr template assignment and void
	template<>
	class auto_ptr<void>
	{
	public:
	typedef void element_type;
	} _GLIBCXX_DEPRECATED;

	_GLIBCXX_END_NAMESPACE_VERSION
	} // namespace

	#endif /* _BACKWARD_AUTO_PTR_H */