RE: [Boost-Users] iterating over a tuple

From: Aleksey Gurtovoy (alexy_at_[hidden])
Date: 2002-04-26 14:19:04

Toon Knapen wrote:
> > Hope it's not too complicated :). LL might allow to do 
> > better on this one.
>
> Thanks, I'll try it out. Coudl you enlighten me on how to 
> solve it with the lambda library. I don't see how to iterate over 
> the different indexes in combination with LL ?

Oh, sorry, my last sentence was probably misleading. What I meant is that LL
can do a better job on construction of the function object that is passed to
tuple's 'accumulate':

    struct get_value
    {
        template< typename T >
        int operator()(T const& x) const
        {
            return x.value();
        }    
    };

    int sum = accumulate(tuple, 0, _1 + ll::bind(get_value(),_2));

I was also hoping that it could help us to get rid of the ad hoc 'get_value'
class, but, thinking about it more, I don't see how :(.

HTH,
Aleksey