Re: [boost] Any real-world need for static_cast_iterator, const_cast_iterator, dynamic_cast_iterator?

Subject: Re: [boost] Any real-world need for static_cast_iterator, const_cast_iterator, dynamic_cast_iterator?
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2009-02-03 07:08:06

Nigel Stewart wrote:
> In addition to the specialised adaptors in the boost iterator
> library, does it make any sense to add:
> 
>     static_cast_iterator
>     const_cast_iterator
>     dynamic_cast_iterator
> 
> ...iterator adaptors providing embedded static_cast<>, const_cast<>
> or dynamic_cast<> when dereferencing?  (Rather than just throwing
> them straight on the scrap heap...)

Personally, I've had much use of a custom made match<Type>() adaptor 
(using the Boost.RangeEx pipe syntax), that performs a transform with 
dynamic_pointer_cast and then filters null results.