Hirrolot on Twitter: "Finally implemented sum types in pure C99, after a year of experimentation: datatype( BinaryTree, (Leaf, int), (Node, struct BinaryTree *, int, struct BinaryTree *) );" / Twitter

Finally implemented sum types in pure C99, after a year of experimentation: datatype( BinaryTree, (Leaf, int), (Node, struct BinaryTree *, int, struct BinaryTree *) );

11:28 AM · Feb 6, 2021Twitter Web App

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int sum(const BinaryTree *tree) { match(*tree) { of(Leaf, x) { return *x; } of(Node, lhs, x, rhs) { return sum(*lhs) + *x + sum(*rhs); } } }

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Take a look at carbon.now.sh for nicely colored and formatted code snippets

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