DefinitionThe iterator adaptor Filter_iterator<Iterator, Predicate> acts as a
filter on a given range. Whenever the iterator is in- or
decremented, it ignores all iterators for which the given
Predicate is true. The iterator category is the same as for
- Iterator is a model for ForwardIterator.
- Predicate is a functor: Iterator
Filter_iterator<Iterator, Predicate> i;
Filter_iterator<Iterator, Predicate> i ( ||
Iterator c = e);
creates an iterator which filters values according to p.
Initializes by taking the first valid iterator (according to p),
starting at c, and stopping at e if none is found.