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Objects as structs with function pointers? 1990 is calling. I'm not a huge C++ fan, but trying to emulate C++ concepts in C is kind of lame at this late date.

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This is pretty much the standard way to write ABI compatible plugin interfaces in C that can be easily bound to multiple other languages.

Just goes to show C++ failed the zero overhead principle.

If you don't have virtual functions, a C++ object is just an struct associated with static function links.

So sad that it did...

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