Re: [Boost-users] [fusion] .at<N>() template member in containers?

Subject: Re: [Boost-users] [fusion] .at<N>() template member in containers?
From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2010-10-06 16:21:52

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On Wednesday 06 October 2010, alfC wrote:
> Hi,
>
>  Excuse my simple minded questions. Sometimes by asking this question
> (often with negative answer) I understand more on the design of the
> Boost libraries.
>
> Besides possible redundancy, why is that the fusion containers, for
> example fusion::vector, doesn't have a template member function to
> extract elements?
>
>  fusion::vector<double, int, std::string> stuff(1.2, 3, "hola");
>  stuff.at<2>(); //returns "hola", just like at_c<2>(stuff);

Wouldn't that require template specializations of the "at()" member template 
for its differing return types?  IIRC, C++ doesn't let you specialize 
template members of template classes.

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