The irony is that Go actually does have sum types, but only for generics! type A... | Hacker News

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		valzam on Aug 14, 2023 \| parent \| context \| favorite \| on: Backward Compatibility, Go 1.21, and Go 2 The irony is that Go actually does have sum types, but only for generics! type A interface { Foo \| Bar \| Baz } Can't use this anywhere but in generic type signatures though :(

bheadmaster on Aug 15, 2023 [–]

There's a proposal [0] by Ian Lance Taylor that proposes extending the type parameter constrains union of types to non-generic interfaces too. Indeed, there are some issues with the implementation details, but I'm hoping they get ironed out.

[0] https://github.com/golang/go/issues/57644

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