Dave Abrahams 230d47e93a Move difference_type from the Forward Traversal Iterator concept to ...

the Single Pass Traversal concept, so that input iterators are still
input iterators.  It does make sense to measure the distance between
Single Pass iterators, provided you're willing to throw away the data.


[SVN r33870]

2006-04-30 03:35:16 +00:00

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