David Abrahams skrev:
on Tue Oct 28 2008, Thorsten Ottosen <thorsten.ottosen-AT-dezide.com> wrote:
Benoit skrev:
Another idea might be to directly use a pair of iterators by creating a special structure for "duplicate pairs"...
for( duplicate_pair<vertex_iterator> vip( vertices( g ) ) ; vip.first != vip.second ; ++vip.first ) { //... }
I am not sure there's a real gain here though. Oh well. Can't blame me for trying ! :-) FWIW, You can already today do
for( boost::iterator_range<vertex_iterator> vip( vertices( g ) ) ; !vip.empty(); vip.advance_begin(1) )
It's sad, but I'm not as confident in the ability to optimize that form because the iterators are bundled into a single struct. Also I am not fond of the constant 1.
I haven't tried on a new compiler (only vc8), but it is quite sad that compilers can't optimize std::advance(i,1) into ++i. -Thorsten