this post was submitted on 19 Aug 2023
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Programming
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At a library level, couldn't you have an opaque sum type where the only thing you can do with it is call a
match
method that requires a function pointer for each possible variant of the sum type? It'd be pretty cursed to use but at least it wouldn't require compiler plugins.I'd bet five bucks some desperate Haskeller or Rustacean has implemented exactly that. You could also probably use nested functions for GCC C or lambdas in C++ to move everything inline?