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is_permutation must be more restrictiveSection: 26.6.14[alg.is.permutation]Status:C++11Submitter: INCITSOpened: 2010-08-25Last modified: 2021-06-06
Priority:Not Prioritized
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Discussion:
Addresses US-120
is_permutation is underspecified for anything but thesimple case where both ranges have the same value typeand the comparison function is an equivalence relation.
[Resolved in Rapperswil by a motion to directly apply the words from the ballot comment in N3102.]
Proposed resolution:
Restrictis_permutation to the case where it is wellspecified. See Appendix 1 - Additional Details