Re: [Boost-users] fusion struct adapt macro, construct the struct from a fusion vector

Subject: Re: [Boost-users] fusion struct adapt macro, construct the struct from a fusion vector
From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2010-01-18 21:25:37

> I am trying to write code that is as independent of the struct as
> possible.
> The first thing that comes to my mind for the ctor is
> 
> struct params {
>   ...// there are 7 members, in the 100 or so different structs I will
> have,
> max 20 members maybe
>   template <typename T1, ... typename T7>
>   params(const fusion::vector<T1,...T7>& v);
> };
> 
> This probably isn't what you meant.
> How to generalize it to any fusion sequence?
> Is it possible to generalize the number of template args?

What about:

  template <typename Seq>
  params(Seq const& seq, 
    typename boost::enable_if<
        fusion::traits::is_sequence<Seq>
    >::type* = NULL);

?

Regards Hartmut

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