[boost] tie alternative?

Subject: [boost] tie alternative?
From: David Abrahams (dave_at_[hidden])
Date: 2008-10-26 23:12:33

OK, BOOST_FOREACH aside, iterating over a range returned as a pair of
iterators can be painful and ugly:

  vertex_iterator pv, ve;
  tie(pv, ve) = vertices(g); // unpack the pair returned by vertices
  for (; pv != pe; ++pv)
  {
      ...
  }

However, we can make it much nicer, e.g.:

  for (vertex_iterator pv,ve = xxx(pv,vertices(g)); pv != ve; ++pv)
  {
      ...
  }

My only problem is how to spell xxx.  The attached proof-of-concept uses
operator%, but I don't feel particularly good about that choice either.
Ideas?

---


-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com