struct inside a class

Hello everyone,


For the MSDN sample,

http://msdn2.microsoft.com/en-us/library/2af6btx2.aspx

Code:

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  template <class U>
      struct rebind { typedef stingyallocator<U> other; };

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My question is, what is the purpose of defining an internal struct which has only a type? How to use it? Why class U is different from _Ty?

(I see similar code in STL internal implementation for allocator class, seems like a pattern which I do not know.)


thanks in advance,
George

Ah, the rebind mechanism. Welcome to the dark secrets of the STL.

Allocators are very complex, and rebind is a part of that. You should get this information from a book.

Thanks CornedBee,


I find the link,

http://msdn2.microsoft.com/en-us/lib...ek(VS.80).aspx

So, I think the purpose of this pattern is to change the template parameter (input type parameter to outer struct) to another one?

Quote:

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Originally Posted by CornedBee

Ah, the rebind mechanism. Welcome to the dark secrets of the STL.

Allocators are very complex, and rebind is a part of that. You should get this information from a book.

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regards,
George

Yes, correct.

Thanks CornedBee,


Question answered. :-)

Quote:

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Originally Posted by CornedBee

Yes, correct.

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regards,
George