Re: [boost] [parameter] Individually applying parameters.

From: Rene Rivera (grafik.list_at_[hidden])
Date: 2006-01-25 19:35:51

David Abrahams wrote:
> Rene Rivera <grafik.list_at_[hidden]> writes:
> 
>> Before I go writing a bunch of code... Is there a way to apply the
>> parameters of an ArgumentPack individually to a function?
>>
>> What I need/want is to be able, through Boost.MPL, to apply each
>> argument in the ArgumentPack to a single function based of the keyword
>> type. For example:
>>
>> struct A
>> {
>>   template <typename Keyword, typename Value>
>>   void SetArgument( Value & v );
>> };
>>
>> template <typename ArgPack>
>> void setter( A & a, ArgPack & p )
>> {
>>   // for each arg in p:
>>   //   a.SetArgument<arg::key_type>(arg.value)
>> }
>>
>> Or equivalent thereof, without knowing ahead of time what the possible
>> argument keywords and values are. I did some minor looking in the
>> parameter code but didn't see anything obvious that already does this.
> 
> It sounds to me like you want a parameter::for_each that can iterate
> the ArgumentPack.  Is that accurate?

Yes! Exactly.

...I can write one, if such a thing doesn't exist. Although I've been 
looking and it seems one would have to do some template type deductions 
as there's no existing tail type define in the arg_list template.

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