Uppercase comparison ops were deprecated in 5.6 (and hence could be ignored with no warnings "deprecated";). They've been made an error in 5.8, so no there's not a way to disable it since it's a syntax error and invalid code.

In reply to Re: How To Turn Off Warnings against UPPER CASE comparison Operators by Fletch
in thread How To Turn Off Warnings against UPPER CASE comparison Operators by donfox

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