• philm@programming.dev
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    1 year ago

    Is this a hard error? Like it doesn’t compile at all?

    Isn’t there something like #[allow(unused)] in Rust you can put over the declaration?

    • flame3244@lemmy.world
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      1 year ago

      Yes it is a hard error and Go does not compile then. You can do _ = foobar to fake variable usage. I think this is okay for testing purposes.

        • flame3244@lemmy.world
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          1 year ago

          Worse than not having a unused variable check at all? Dunno, the underscore assignment are very visible for me and stand out on every code read and review.

          • AeonFelis@lemmy.world
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            1 year ago

            Yes, worse, because now if you want to use the underscore assignment to indicate that you really want to discard that variable - it gets confused with underscore assignments that were put there “temporarily” for experimentation purpose.

            • merc@sh.itjust.works
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              1 year ago

              Exactly.

              Say I’m having some issue with a function. I comment out half the function to see if that’s where the weirdness is. Golang says “unused variable, I refuse to compile this dogshit!” I completely fool Golang by just using _ = foo. Yes, I was correct, that’s where the problem was. I rewrite that section of the code, and test it out, things work perfectly. Only now, it turns out I’m not using foo anymore, and Golang has no idea because I so cleverly fooled it with _ = foo.

              Now, something that could be caught by a linter and expressed as a warning is missed by the language police entirely, and may make it into production code.

              Police the code that people put into a repository / share with others. Don’t police the code that people just want to test on their own.

      • nomadjoanne@lemmy.world
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        1 year ago

        Ew, that’s awful. Go is not one of my programming languages but I had always held it in high esteem because Ken Thompson and Rob Pike were involved in it.

        • merc@sh.itjust.works
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          1 year ago

          That’s the main reason it has had any success. It’s not that it’s a good language, it’s just that it has good references.

        • flame3244@lemmy.world
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          1 year ago

          Honestly, it does not happen often that I have a ln unused variable that I want to keep. In my mind it is the same thing when wanting to call a function that does not exists. Also my editor is highlighting error Long before I try to compile, so this is fine too for me.

      • AstridWipenaugh@lemmy.world
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        1 year ago

        The underscore is used in production code too. It’s a legitimate way to tell the compiler to discard the object because you don’t intend to use the pointer/value.

    • HiddenLayer5
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      1 year ago

      Never really coded in Go outside of trying it out, but as far as I know it’s a hard error.