Regina Calculation Engine
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Iterates through all crossings of a link.
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#include <link/link.h>
Public Member Functions | |
CrossingIterator () | |
Creates a singular iterator. More... | |
CrossingIterator (const CrossingIterator &)=default | |
Default copy constructor. More... | |
CrossingIterator (const Link &link, size_t index=0) | |
Creates a new iterator pointing to the given crossing of the given link. More... | |
CrossingIterator & | operator++ () |
Preincrement operator. More... | |
CrossingIterator | operator++ (int) |
Postincrement operator. More... | |
Crossing * | operator* () const |
Returns the crossing to which this iterator points. More... | |
CrossingIterator & | operator= (const CrossingIterator &)=default |
Default assignment operator. More... | |
bool | operator== (const CrossingIterator &rhs) const |
Tests whether this and the given iterator are equal. More... | |
bool | operator!= (const CrossingIterator &rhs) const |
Tests whether this and the given iterator are different. More... | |
Iterates through all crossings of a link.
The order of iteration follows the indexing of the crossings from 0 to Link::size()-1.
This class implements the Boost multipass input iterator concept, which is similar to the standard C++ forward iterator except that the reference type may be the same as value_type (and so, in particular, the dereference operator may return by value). This header also specialises std::iterator_traits for this iterator type.
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Creates a singular iterator.
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default |
Default copy constructor.
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Creates a new iterator pointing to the given crossing of the given link.
link | the underlying knot/link. |
index | the index of the crossing to point to. This must be between 0 and link.size()-1 for a deferencable iterator, or must be exactly link.size() for a past-the-end iterator. |
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Tests whether this and the given iterator are different.
rhs | the iterator to compare with this. |
true
if and only if the two iterators are different.
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Returns the crossing to which this iterator points.
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Preincrement operator.
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Postincrement operator.
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default |
Default assignment operator.
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inline |
Tests whether this and the given iterator are equal.
rhs | the iterator to compare with this. |
true
if and only if the two iterators are equal.