forked from boostorg/iterator
56 lines
1.8 KiB
ReStructuredText
56 lines
1.8 KiB
ReStructuredText
.. parsed-literal::
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template< class ElementIterator
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, class IndexIterator
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, class ValueT = use_default
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, unsigned access = use_default_access
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, class Traversal = use_default
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, class ReferenceT = use_default
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, class DifferenceT = use_default >
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class permutation_iterator
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: public iterator_adaptor<...>
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{
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typedef iterator_adaptor<...>
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friend class iterator_core_access;
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public:
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permutation_iterator();
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explicit permutation_iterator(ElementIterator x, IndexIterator y);
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template< class OEIter, class OIIter, class V, class C, class R, class D >
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permutation_iterator(
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permutation_iterator<OEIter, OIIter, V, C, R, D> const& r
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, typename enable_if_convertible<OEIter, ElementIterator>::type* = 0
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, typename enable_if_convertible<OIIter, IndexIterator>::type* = 0
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);
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};
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``permutation_iterator`` requirements
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-------------------------------------
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``ElementIterator`` must be a model of RandomAccessIterator__.
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``IndexIterator`` must at least be a model ForwardIterator__. The
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value type of the ``IndexIterator`` must be convertible to the
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difference type of ``ElementIterator``.
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__ http://www.sgi.com/tech/stl/RandomAccessIterator.html
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__ http://www.sgi.com/tech/stl/ForwardIterator.html
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``permutation_iterator`` operations
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-----------------------------------
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The permutation iterator implements the member functions and operators
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required for the `Random Access Iterator`__ concept. However, the
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permutation iterator can only meet the complexity guarantees of the
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same concept as the IndexIterator. Thus for instance, although the
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permutation iterator provides ``operator+=(distance)``, this operation
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will take linear time in case the IndexIterator is a model of
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ForwardIterator instead of amortized constant time.
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__ http://www.sgi.com/tech/stl/RandomAccessIterator.html
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