Re: [Boost-users] [accumulators] help/advise required: Need a container to hold accumulator_set

Subject: Re: [Boost-users] [accumulators] help/advise required: Need a container to hold accumulator_set
From: dhruva (dhruva_at_[hidden])
Date: 2009-02-22 01:08:44

Hello,



----- Original Message ----
> From: Eric Niebler <eric_at_[hidden]>
> To: boost-users_at_[hidden]
> Sent: Sunday, 22 February, 2009 11:25:30 AM
> Subject: Re: [Boost-users] [accumulators] help/advise required: Need a container to hold accumulator_set
> 
> 
> dhruva wrote:
> > will have to make it a member variable of a class. I will not know
> > the type of calculations to requested at compile time. I therefore
> > need a generic accumulator type as member and add the specific type
> > at runtime.
> 
> 
> It doesn't sound like Boost.Accumulators is a good fit for your problem. 
> Accumulators uses static type information to resolve computational dependencies 
> and order calculations. As you don't know what you will be computing until 
> runtime, you can't provide Accumulators with the static type information it 
> requires.
> 

The approach I proposed by using droppable types and dropping those that are not required. is it expensive? Though it might look not so elegant, would that work?

-dhruva


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