29 Numerics library [numerics]

29.9 Basic linear algebra algorithms [linalg]

29.9.13 BLAS 1 algorithms [linalg.algs.blas1]

29.9.13.3 Swap matrix or vector elements [linalg.algs.blas1.swap]

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template<inout-object InOutObj1, inout-object InOutObj2> void swap_elements(InOutObj1 x, InOutObj2 y); template<class ExecutionPolicy, inout-object InOutObj1, inout-object InOutObj2> void swap_elements(ExecutionPolicy&& exec, InOutObj1 x, InOutObj2 y);
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[Note 1: 
These functions correspond to the BLAS function xSWAP[bib].
— end note]
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Constraints: x.rank() equals y.rank().
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Mandates: For all r in the range [0, x.rank()), compatible-static-extents<InOutObj1, InOutObj2>(r, r) is true.
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Preconditions: x.extents() equals y.extents().
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Effects: Swaps all corresponding elements of x and y.