Re: [boost] If boost::fusion is the hammer, then what's the nail?

From: Nicola Musatti (Nicola.Musatti_at_[hidden])
Date: 2006-12-15 04:28:49

Thorsten Ottosen <thorsten.ottosen <at> dezide.com> writes:
[...]
> What bothers me is the self-explanatory properties are lost; I can't 
> figure out what tuple element that means what by just looking at the 
> code. Is it
> 
>    tie(eval,dev1,dev2) = find_root(...)
> 
> or
> 
>    tie(dev1,dev2,eval) = find_root(...)
> 
> ?
> 
> Instead a struct would be somewhat unambiguous:
> 
>    template< class Float >
>    struct root_result
>    {
>      Float eval, dev1, dev2;
>    };
> 
>    root_result<float> r = find_root( ... );

One could always do something like

template< class Float >
struct root_result : public tuple<Float &, Float &, Float &>
{
  root_result() : tuple<Float &, Float &, Float &>(eval, dev1, dev2) {}
  Float eval, dev1, dev2;
};

And get the best of both worlds. I sort of wish the compiler would create it by
magic, though.

Cheers,
Nicola Musatti