Let's say I have a class FooError that implements ...

# getting-started

[David Glasser]

Let's say I have a class FooError that implements a bunch of different interfaces. I can't write a generic that uses FooError as a lower bound somehow, can I? Like I'd love to be able to do

inline fun <R> runFOrReturnFooError(f: () -> R): R = 
  if (someCondition) {
    f()
  } else {
    FooError()
  }

such that R is allowed to be any of the interfaces that FooError implements

[Raphael TEYSSANDIER]

Does inline fun <R : FooError> runFOrReturnFooError(f: () -> R): R work ?

[sciack]

Why not use a Result class?

[sciack]

I think you have to define as <R: in FooError> but not sure if works well.

[sciack]

also because with where condition all must match.