One way to allow generic functions to work on both built-in and
user-defined types would be to add some specialized functions in the
standard library. These would be like overloaded operators, but with
function syntax instead of operator syntax. For example, we might have a
package operators, containing a function Add that would expand to one of
these
func Add(type T)(a, b T) T {
return a.Add(T)
}
func Add(type T)(a, b T) T {
return a + b
}
depending on whether T had a suitable Add method or not. I've written up a
more detailed description at
https://gist.github.com/pat42smith/ed63aca983d4ba14fdfa320296211f40
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