Comment by sfn42
C# has anonymous types which is pretty much the same thing. Though I prefer to declare actual types for most usecases, I'll only use anonymous types for intermediate results and such.
C# has anonymous types which is pretty much the same thing. Though I prefer to declare actual types for most usecases, I'll only use anonymous types for intermediate results and such.
I certainly don't mean to knock nominal types. But I think structural types are more fundamental. A language would only need a single "newtype" or "nominal" keyword to create nominal types from structural types.