New: no-unsafe-negation rule (fixes #2716)
#6789
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@mysticatea, thanks for your PR! By analyzing the annotation information on this pull request, we identified @nzakas, @michaelficarra and @vitorbal to be potential reviewers |
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LGTM. |
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Fixes #2716.
This PR adds
no-unsafe-negationrule, and deprecatesno-negated-in-lhsrule.no-unsafe-negationrule is:!expression in the left operand of relational expressions (inorinstanceof).!. (!a in b→!(a in b))This PR should follow #6746 for the deprecation way.