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From: David Abrahams (dave_at_[hidden])
Date: 2005-01-10 09:12:33

Jens Theisen wrote:
> Hello,
> I want to use indirect_iterator and noticed that it subscript operator
> returns a proxy.
> I found the following explanation in iterator_facade.h:
> // A proxy return type for operator[], needed to deal with
> // iterators that may invalidate referents upon destruction.
> // Consider the temporary iterator in *(a + n)
> But I still don't understand why a proxy is necessary in some cases.

explains all.


Dave Abrahams
Boost Consulting

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