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- .. Copyright David Abrahams 2006. Distributed under the Boost
- .. Software License, Version 1.0. (See accompanying
- .. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- The filter iterator adaptor creates a view of an iterator range in
- which some elements of the range are skipped. A predicate function
- object controls which elements are skipped. When the predicate is
- applied to an element, if it returns ``true`` then the element is
- retained and if it returns ``false`` then the element is skipped
- over. When skipping over elements, it is necessary for the filter
- adaptor to know when to stop so as to avoid going past the end of the
- underlying range. A filter iterator is therefore constructed with pair
- of iterators indicating the range of elements in the unfiltered
- sequence to be traversed.
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