[boost] Re: [iterator facade] Why is dereference const?

From: Neal D. Becker (ndbecker2_at_[hidden])
Date: 2004-05-13 06:37:50

Thanks for the advice.  I think I have it now.

Problem:

  A function F accepts a pair of stl-style iterators as input.  A nullary
functor G can generate an output.  Arrange for F to call G n times without
storing to an intermediate sequence.

Example: G is a random number generator.

I wonder if there is a more elegant approach?  Here is what I came up with. 
It is almost perfect, there seems to be 1 extra call to G() that I haven't
accounted for, but this may or may not be important.