Re: [boost] [Fusion] Some ideas

Subject: Re: [boost] [Fusion] Some ideas
From: Joel de Guzman (djowel_at_[hidden])
Date: 2013-02-02 18:40:34

On 2/2/13 3:52 PM, TONGARI wrote:
> Hi,
>
> Here are some ideas come up when writing some associative mapping
> algorithm/views.
> I think it'd be nice to have:
> * Auxiliary function 'eval' to force the evaluation of transform-like view
>    e.g. fusion::eval(fusion::transform(a, b, some_void_return_ftor))

How's that any different from as_vector, as_list, etc. ? Also, what
will be the container type of the result of "eval" ?

> * Conversion function 'as_view' to make Container a view to reserve the
> mutability.

You mean to make it immutable?

> What do you think? Are these already achieved in some way that I didn't
> aware of?
>
> BTW, I just implemented left_mapping/left_mapped_view, it's used like
>
>      result = left_mapping(m1, m2, transform);
>
> For elements not mapped, fusion::void_ is passed to transform.
>
> Still mapping & full_mapping to do...

Awesome! Looking forward to this.

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://boost-spirit.com