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: Eric Niebler (eric_at_[hidden])
Date: 2009-02-22 00:55:30

dhruva wrote:
> Hello, I am writing a wrapper class which gets data over time and has
> to compute a variety of statistics using boost::accumulators. The
> accumulator cannot be a variable on the stack (function local
> variable) as it will go out of scope after the function invocation. I
> 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.
<snip>

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.

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com