Set Operations

Collaboration diagram for Set Operations:

Functions
template<typename _InputIterator1 , typename _InputIterator2 >
constexpr bool	std::includes (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2)
template<typename _InputIterator1 , typename _InputIterator2 , typename _Compare >
constexpr bool	std::includes (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >
constexpr _OutputIterator	std::set_difference (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >
constexpr _OutputIterator	std::set_difference (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >
constexpr _OutputIterator	std::set_intersection (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >
constexpr _OutputIterator	std::set_intersection (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >
constexpr _OutputIterator	std::set_symmetric_difference (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >
constexpr _OutputIterator	std::set_symmetric_difference (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >
constexpr _OutputIterator	std::set_union (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >
constexpr _OutputIterator	std::set_union (_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)

Detailed Description

These algorithms are common set operations performed on sequences that are already sorted. The number of comparisons will be linear.

Function Documentation

includes() [1/2]

template<typename _InputIterator1 , typename _InputIterator2 >

constexpr bool std::includes ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2  )

inlineconstexpr

Determines whether all elements of a sequence exists in a range.

Parameters

__first1	Start of search range.
__last1	End of search range.
__first2	Start of sequence
__last2	End of sequence.

Returns

True if each element in [__first2,__last2) is contained in order within [__first1,__last1). False otherwise.

This operation expects both [__first1,__last1) and [__first2,__last2) to be sorted. Searches for the presence of each element in [__first2,__last2) within [__first1,__last1). The iterators over each range only move forward, so this is a linear algorithm. If an element in [__first2,__last2) is not found before the search iterator reaches __last2, false is returned.

Definition at line 2821 of file stl_algo.h.

includes() [2/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _Compare >

constexpr bool std::includes ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _Compare  __comp  )

inlineconstexpr

Determines whether all elements of a sequence exists in a range using comparison.

Parameters

__first1	Start of search range.
__last1	End of search range.
__first2	Start of sequence
__last2	End of sequence.
__comp	Comparison function to use.

Returns

True if each element in [__first2,__last2) is contained in order within [__first1,__last1) according to comp. False otherwise.

This operation expects both [__first1,__last1) and [__first2,__last2) to be sorted. Searches for the presence of each element in [__first2,__last2) within [__first1,__last1), using comp to decide. The iterators over each range only move forward, so this is a linear algorithm. If an element in [__first2,__last2) is not found before the search iterator reaches __last2, false is returned.

Definition at line 2867 of file stl_algo.h.

set_difference() [1/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >

constexpr _OutputIterator std::set_difference ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result  )

inlineconstexpr

Return the difference of two sorted ranges.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in the first range but not the second in order to the output range. Iterators increment for each range. When the current element of the first range is less than the second, that element is copied and the iterator advances. If the current element of the second range is less, the iterator advances, but no element is copied. If an element is contained in both ranges, no elements are copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5401 of file stl_algo.h.

set_difference() [2/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >

constexpr _OutputIterator std::set_difference ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result, _Compare  __comp  )

inlineconstexpr

Return the difference of two sorted ranges using comparison functor.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.
__comp	The comparison functor.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in the first range but not the second in order to the output range. Iterators increment for each range. When the current element of the first range is less than the second according to __comp, that element is copied and the iterator advances. If the current element of the second range is less, no element is copied and the iterator advances. If an element is contained in both ranges according to __comp, no elements are copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5453 of file stl_algo.h.

set_intersection() [1/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >

constexpr _OutputIterator std::set_intersection ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result  )

inlineconstexpr

Return the intersection of two sorted ranges.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in both ranges in order to the output range. Iterators increment for each range. When the current element of one range is less than the other, that iterator advances. If an element is contained in both ranges, the element from the first range is copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5276 of file stl_algo.h.

set_intersection() [2/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >

constexpr _OutputIterator std::set_intersection ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result, _Compare  __comp  )

inlineconstexpr

Return the intersection of two sorted ranges using comparison functor.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.
__comp	The comparison functor.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in both ranges in order to the output range. Iterators increment for each range. When the current element of one range is less than the other according to __comp, that iterator advances. If an element is contained in both ranges according to __comp, the element from the first range is copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5326 of file stl_algo.h.

set_symmetric_difference() [1/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >

constexpr _OutputIterator std::set_symmetric_difference ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result  )

inlineconstexpr

Return the symmetric difference of two sorted ranges.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in one range but not the other in order to the output range. Iterators increment for each range. When the current element of one range is less than the other, that element is copied and the iterator advances. If an element is contained in both ranges, no elements are copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5534 of file stl_algo.h.

set_symmetric_difference() [2/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >

constexpr _OutputIterator std::set_symmetric_difference ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result, _Compare  __comp  )

inlineconstexpr

Return the symmetric difference of two sorted ranges using comparison functor.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.
__comp	The comparison functor.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in one range but not the other in order to the output range. Iterators increment for each range. When the current element of one range is less than the other according to comp, that element is copied and the iterator advances. If an element is contained in both ranges according to __comp, no elements are copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5586 of file stl_algo.h.

set_union() [1/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator >

constexpr _OutputIterator std::set_union ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result  )

inlineconstexpr

Return the union of two sorted ranges.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in each range in order to the output range. Iterators increment for each range. When the current element of one range is less than the other, that element is copied and the iterator advanced. If an element is contained in both ranges, the element from the first range is copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5152 of file stl_algo.h.

set_union() [2/2]

template<typename _InputIterator1 , typename _InputIterator2 , typename _OutputIterator , typename _Compare >

constexpr _OutputIterator std::set_union ( _InputIterator1  __first1, _InputIterator1  __last1, _InputIterator2  __first2, _InputIterator2  __last2, _OutputIterator  __result, _Compare  __comp  )

inlineconstexpr

Return the union of two sorted ranges using a comparison functor.

Parameters

__first1	Start of first range.
__last1	End of first range.
__first2	Start of second range.
__last2	End of second range.
__result	Start of output range.
__comp	The comparison functor.

Returns

End of the output range.

This operation iterates over both ranges, copying elements present in each range in order to the output range. Iterators increment for each range. When the current element of one range is less than the other according to __comp, that element is copied and the iterator advanced. If an equivalent element according to __comp is contained in both ranges, the element from the first range is copied and both ranges advance. The output range may not overlap either input range.

Definition at line 5203 of file stl_algo.h.