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  • @SpaceNoodle
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    513 days ago

    How do you implement an interface in C++ without an abstract class?

    • magic_lobster_party
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      313 days ago

      Ask Bjarne to add interfaces enough many times until he gives in.

      On a more serious note, I’m not exactly sure what the best C++ practice is. I guess you just have to live with abstract classes if you really want interfaces.

      • @SpaceNoodle
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        613 days ago

        An abstract class with no member variables serves the same purpose in C++.

        • magic_lobster_party
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          213 days ago

          The only problem is to ensure the entire team agrees to only use it like an interface and nothing else. But I guess that’s the only proper way to do it in C++, for now.

          • @SpaceNoodle
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            313 days ago

            That’s not really the job of the language, though. If they can’t read the design docs and source annotations, they don’t really have any business touching anything.

          • @affiliate
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            213 days ago

            this seems like the only proper way to do anything in C++. it’s a language where there’s 5 ways to do 1 thing and 1 way to do 5 things.

    • pelya
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      113 days ago

      I know at least three ways, one of them involves variadic macros.

      You don’t even need to look that far, take any sufficiently aged library, like OpenGL.

        • pelya
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          213 days ago

          Yet I still had an urge to explain an obvious thing. Because it’s C++, so everyhing goes. There are even tools to auto-generate C++ interfaces, because of course someone decided that C++ is inadequate and must be improved using some kind of poorly-documented ad-hoc extension language on top of C++.