https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65120
Bug ID: 65120 Summary: [gcc5] Wlogical-not-parentheses should not wanr about double exclamation !! Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: jirislaby at gmail dot com While warning about "if (!a == b)" is perfectly fine and I like it, I do not like warning about "if (!!a = b)" at all. It generates plenty of false positives (in the Linux kernel at least) and I doubt it can warn about an error at all. Better than papering over this as "if ((!aa) = b)" or by -Wno-logical-not-parentheses does not make much sense to me (opposing to the single ! case). Note: this is all about: "logical not is only applied to the left hand side of comparison"