That’s a very interesting idea. It would probably need to be extended to allow
specifying that a type is like multiple types. Then the effective “contract”
would be the intersection of the operations provided by those types. For
example, we would want to be able to specify a type that is like both string
and []byte; it would support len, range, and indexing, but not + or mutation.
Combining this concept with the function syntax from the standard proposal,
here is what the classic Min function would look like:
func Min(type T like(int, float64))(a, b T) T {
if a < b {
return a
}
return b
}
Andy
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