[swift-users] @noReturn

[Rien]

Is there any way to mark a function as “no return”?

Reason: The compiler generates an error when the else block from a guard does not terminate the execution by either a return or a fatalError. I want to call out to a function and raise the fatalError in that function.

func findReasonAndTerminate() {
   let reason: String = ….
   fatalError(reason)
}

main.swift:

guard let data = buildData() else { findReasonAndTerminate() }


Currently the work around is to add another fatalError like this:

guard let data = buildData() else { findReasonAndTerminate(); fatalError }


but it would be nice to have some attribute like @noReturn:

@noReturn
func findReasonAndTerminate() { … }


Regards,
Rien

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