Re: [boost] Formal Review: The Spirit Parser Framework.

From: Joel de Guzman (djowel_at_[hidden])
Date: 2002-10-21 05:51:36

----- Original Message ----- 
From: "Aleksey Gurtovoy" <agurtovoy_at_[hidden]>

> Dan Nuffer wrote:
> > As the author of multi_pass, I had originally envisioned submitting 
> > it separate from spirit.  But, one day I realized that I couldn't 
> > think of a use for it outside of spirit.  Maybe I'm just not 
> > imaginitive enough! But, I personally never had the need to convert 
> > an input iterator into a forward iterator, other than with spirit.  
> 
> Here is an easy use case - one wants to know how many elements are in the
> input sequence _before_ the actual processing happens, even if at the cost
> of additional iteration through the sequence:
> 
>     template< typename Iterator >
>     void do_input(Iterator first, Iterator last)
>     {{
>         multi_pass<Iterator> first(first);
>         multi_pass<Iterator> last(last);
>          
>         std::size_t size = std::distance(first, last);
>         // using size/fist/last...
>     }}
> 
> > So, if there is some interest, I'll submit it.
> 
> I thought it's being submitted as a part of Spirit anyway ;). IMO it's
> definitely should be factored out into a standalone mini-library.

If multi_pass is updated to support bidirectional iterators,
regex will benefit from it as well. I think there are lots of uses
for the multi_pass.

--Joel

{{ Aleksey, any reason for the double braces? Looks cool, IMO }}