Boost logo

Boost :

From: Arun Sivaramakrishnan (aruns_at_[hidden])
Date: 2001-01-21 00:04:46

> On Sun, 21 Jan 2001, Arun Sivaramakrishnan wrote:
> > Most often ,I wouldnt want to write a functor everytime I use
> > transform_adaptor(or projection_adaptor)
> This looks like what I thought that I had seen. Did you send it
> before? To me, not boost?
I sent that last night to you and not to boost.
.Sorry about the names (projection_iterator not adaptor)
.I must confess I was half asleep when I wrote that.

> Anyway, I agree that projection_iterator is broken. You seem to
> be about the only one who has used the adaptors other than those
> of us involved in the developement.
> Projection iterator has reference semantics. The adapted iterator,
> const or non-const, determines the input to the function object.
> The output of the function object must be a const/non-const reference.
> The problem is extracting the value_type for the projection_iterator.
> Given that, the other four traits are determined from it and the
> adapted iterator.
> I have a revised version which requires the value type as a template
> parameter. Template<Value, Function, Iterator, Traits = ..>. Would
> you like to try it? Does that sound like a reasonable solution?

Reasonable,though not an ideal solution considering
the constraints here.

Thanks ,

Boost list run by bdawes at, gregod at, cpdaniel at, john at