RE: [boost] iterator ranges; eliminating private member functions

From: brangdon_at_[hidden]
Date: 2001-11-11 16:40:11

In-Reply-To: <4034600A4760D411B8720001031D84FB431086_at_[hidden]>
On Mon, 5 Nov 2001 02:54:50 -0600 Aleksey Gurtovoy (alexy_at_[hidden]) 
wrote:
> template<typename InputSequence, typename UnaryFunction>
> inline
> UnaryFunction
> for_each(InputSequence const& seq, UnaryFunction const& f)
> {
>     return std::for_each(
>         boost::begin(seq)
>       , boost::end(seq)
>       , f
>       );
> }

I meant the opposite:

    template <typename iterator, typename functor>
    functor for_each( iterator first, iterator last, functor f ) {
        return for_each( make_sequence( first, last ), f );
    }

This allows the more primitive version of for_each to take advantage of 
any methods we add to the sequence object interface. If, as you suggest 
elsewhere, a sequence is something which can be modeled by a container, it 
can have container-like methods such as empty() and size(). These will 
clarify the algorithm's code and perhaps be more efficient.

-- Dave Harris