Can generics save virtual function calls?

[Amit Lavon]

Hi gophers,

When we use an interface as a type parameter, does it mean that calls to that interface will be replaced with calls to the concrete type?

To demonstrate, consider https://go.dev/play/p/j4N8G_n-3uG .

Will the compiler create a static call to MyDoer.Do instead of a virtual call to Doer.Do?

[Ian Lance Taylor]

Occasionally, yes. In general, no. It depends, and it will likely
vary between different Go compilers and different releases of the same
Go compiler.

Ian

[Amit Lavon]

Thank you!