Re: [Boost-users] Implementing Range Adaptor or "transformation" iterator

Subject: Re: [Boost-users] Implementing Range Adaptor or "transformation" iterator
From: Nathan Ridge (zeratul976_at_[hidden])
Date: 2011-07-18 21:00:43

> Date: Mon, 18 Jul 2011 18:43:57 -0500
> From: mpbecey7gu_at_[hidden]
> To: boost-users_at_[hidden]
> Subject: [Boost-users] Implementing Range Adaptor or "transformation"	iterator
> 
> I see the documentation "doc/html/range/reference/extending/method_3/method_3_1.html" and 
> want to do something like that.  The Adaptor I want to write will transform the elements 
> and provide a lazy transformed view.
> 
> So, I need the return range to be a pair of transformed iterators, and a transform 
> iterator works just like the underlying iterator only the * operator will apply my 
> function to the value as it fetches it.
> 
> But, it seems to me that there should be something like that already.  Is there something 
> I'm overlooking in STL or in some other Boost library?

There is something you are overlooking in the Boost.Range library itself :)

http://www.boost.org/doc/libs/1_47_0/libs/range/doc/html/range/reference/adaptors/reference/transformed.html

Regards,
Nate.