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[unord.req] should use dual-range is_permutation() #235

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StephanTLavavej opened this issue Nov 21, 2013 · 1 comment
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[unord.req] should use dual-range is_permutation() #235

StephanTLavavej opened this issue Nov 21, 2013 · 1 comment

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@StephanTLavavej
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Thanks to N3797 25.2.12 [alg.is_permutation]/3 "If last1 - first1 != last2 - first2, return false.", we can simplify 23.2.5 [unord.req]/12
from: "such that distance(Ea1, Ea2) == distance(Eb1, Eb2) and is_permutation(Ea1, Ea2, Eb1) returns true."
to: "such that is_permutation(Ea1, Ea2, Eb1, Eb2) returns true."
@StephanTLavavej StephanTLavavej mentioned this issue Dec 7, 2013
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@AlisdairM
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Per the comment in #240 (noted by cpplearner) this was resolved as library issue http://cplusplus.github.io/LWG/lwg-defects.html#2257 in C++14, and this issue can be safely closed.

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@AlisdairM @StephanTLavavej