Re: [boost] auto_vector - vector with auto_ptr semantics

From: Hamish Mackenzie (boost_at_[hidden])
Date: 2002-02-05 15:18:06

On Tue, 2002-02-05 at 19:52, Hamish Mackenzie wrote:
> template< class T >
> move_to_here
> {
>   unsigned char buffer_[ sizeof( T ) ];
>   T *get() { return reinterperet_cast< T * >( &buffer_ ); }
>   const T *get() const { return reinterperet_cast< T * >( &buffer_ ); }
> 
> public:
>   move_to_here() { construct( get() ); }
>   // not sure if it should have default constructor
>   
>   explicit move_to_here( T &source )
>   {
>     move_construct( get(), source );
>   }
>   ~move_to_here() { destroy( get ); }
> 
>   operator T &() { return *get(); }
>   operator const T &() const { return *get(); }

  T * operator -> () { return get(); }
  const T * operator -> () const { return get(); }

> };
> 
> Then you could do this
> 
> move_to_here< T > temp( x );
> 
> This might even help on compilers that do not do return value
> optomization
> 
> move_to_here< T > f()
> {
>   T x;
>   return move_to_here< T >( x );
> }
> 
> Hamish Mackenzie