25 Feb
2009
25 Feb
'09
6 p.m.
On Wed, Feb 25, 2009 at 6:51 PM, Thorsten Ottosen <thorsten.ottosen@dezide.com> wrote:
Neil Groves skrev:
Dear Giovanni,
I had considered creating a range adaptor to be highly different to applying an algorithm, perhaps I over-emphasised this distinction when making the decision.
FWIW, I have code like this:
total = ( r | filter(_r, f) | map(_r, m) | accumulate(_r, zero, a) );
i.e. I don't have a strong distinction between adaptor and algorithms.
Yes, I'm sold!
Hm. What is the utility of _r above?
Its a placeholder. If filter(range, f) returns a filtered iterator range, filter(_r, f) returns an unary function object from ranges to filtered iterator ranges. _r It is the more or less the equivalent of _1 in 'bind(filter, _1, f)'. -- gpd