Re: [boost] [Fusion] Some ideas

Subject: Re: [boost] [Fusion] Some ideas
From: Joel de Guzman (djowel_at_[hidden])
Date: 2013-02-02 23:49:46

On 2/3/13 11:50 AM, TONGARI wrote:
> 2013/2/3 Joel de Guzman <djowel_at_[hidden]>
>
>> 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. ?
>
>
> They cannot take voids.
>
>
>> Also, what will be the container type of the result of "eval" ?
>
>
> Void. Just to trigger each transformation.

Do you have a use-case?

>>   * Conversion function 'as_view' to make Container a view to reserve the
>>> mutability.
>>>
>>
>> You mean to make it immutable?
>
>
> No, the opposite, to keep the elements mutable as they were.
> Algorithms in Fusion take const&, 'as_view' is mean to workaround.
> Not sure if Fusion will insist on functional-style.

No, the opposite. I'm thinking about allowing mutable views. Would
you be willing to implement them?

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