func withExtendedLifetime<T, Result>(_: T, _: (T) throws -> Result)
Evaluates a closure while ensuring that the given instance is not destroyed before the closure returns.
Parameters:
x: An instance to preserve until the execution of body is completed.
body: A closure to execute that depends on the lifetime of x being
extended. If body has a return value, that value is also used as the
return value for the withExtendedLifetime(_:_:) method.
Returns: The return value, if any, of the body closure parameter.
Declaration
funcwithExtendedLifetime<T,Result>(_x:T,_body: (T)throws->Result)rethrows->Result
Evaluates a closure while ensuring that the given instance is not destroyed before the closure returns.
Parameters: x: An instance to preserve until the execution of
bodyis completed. body: A closure to execute that depends on the lifetime ofxbeing extended. Ifbodyhas a return value, that value is also used as the return value for thewithExtendedLifetime(_:_:)method. Returns: The return value, if any, of thebodyclosure parameter.Declaration
funcwithExtendedLifetime<T,Result>(_x:T,_body: ()throws->Result)rethrows->Result