# checked_set_symmetric_difference

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

Same as set_symmetric_difference but enforces the use of a checked iterator as output iterator. checked_set_symmetric_difference is defined in the stdext namespace.

Note

This algorithm is a Microsoft extension to the Standard C++ Library. Code implemented using this algorithm will not be portable.

```
template<class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator checked_set_symmetric_difference(
InputIterator1_First1,
InputIterator1_Last1,
InputIterator2_First2,
InputIterator2_Last2,
OutputIterator_Result
);
template<class InputIterator1, class InputIterator2, class OutputIterator, class BinaryPredicate>
OutputIterator checked_set_symmetric_difference(
InputIterator1_First1,
InputIterator1_Last1,
InputIterator2_First2,
InputIterator2_Last2,
OutputIterator_Result,
BinaryPredicate_Comp
);
```

## Parameters

_First1

An input iterator addressing the position of the first element in the first of two sorted source ranges to be united and sorted into a single range representing the symmetric difference of the two source ranges.

_Last1

An input iterator addressing the position one past the last element in the first of two sorted source ranges to be united and sorted into a single range representing the symmetric difference of the two source ranges.

_First2

An input iterator addressing the position of the first element in second of two consecutive sorted source ranges to be united and sorted into a single range representing the symmetric difference of the two source ranges.

_Last2

An input iterator addressing the position one past the last element in second of two consecutive sorted source ranges to be united and sorted into a single range representing the symmetric difference of the two source ranges.

_Result

An output iterator addressing the position of the first element in the destination range where the two source ranges are to be united into a single sorted range representing the symmetric difference of the two source ranges.

_Comp

User-defined predicate function object that defines the sense in which one element is greater than another. The binary predicate takes two arguments and should return true when the first element is less than the second element and false otherwise.

## Return Value

An output iterator addressing the position one past the last element in the sorted destination range representing the symmetric difference of the two source ranges.

## Remarks

See set_symmetric_difference for a code sample.

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