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Section: 24.5.12 [alg.is_permutation] Status: C++11 Submitter: INCITS Opened: 2010-08-25 Last modified: 2016-02-10
Priority: Not Prioritized
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is_permutation is underspecified for anything but the simple case where both ranges have the same value type and the comparison function is an equivalence relation.
[ Resolved in Rapperswil by a motion to directly apply the words from the ballot comment in N3102. ]
Restrict is_permutation to the case where it is well specified. See Appendix 1 - Additional Details