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Unable to receive warnings about unused features

I would like Xcode to show a warning if I have unused functions in my project. I am using Swift.

I went to Project / Build settings and in the Apple LLVM 8.1 - Warnings - All Languages section I set Unused functions to Yes .

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But I do not get a warning about unused functions in my project.

How can I install Xcode correctly to show me warnings for unused functions?

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I do not believe that any of these warning flags apply to Swift; they are mainly applied to C languages ​​(C, C ++, Objective-C). I understand that the Swift team wants to avoid creating “dialects” of the language, so all warnings and errors supported by the Swift compiler are always on, and there really is no way to enable or disable individual warnings. Therefore, given this, I believe that the Swift compiler is currently not able to test unused functions.

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Source: https://habr.com/ru/post/1271310/

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