Re: [boost] function based associative generator

From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2008-06-24 09:26:48

Dean Michael Berris wrote:

> Almost does it, but not necessarily. Constructing an instance of the
> transform iterator would require the instantiation of the
> counting_iterator as well.
> 
> template <class ResultType, class InputType>
> struct generator {
>   typedef transform_iterator<
>     function<ResultType(InputType)>, counting_iterator<InputType>
>   > iterator;
>   typedef iterator const const_iterator;
> 
>   iterator begin() {
>     return make_transform_iterator(
>       counting_iterator<InputType>(), _function
>     );
>   };
> [...]

By using ranges instead of iterators, you can get that container-like
behaviour (grouping of begin and end).

However counting_range doesn't seem to be implemented yet.