Contents

withExtendedLifetime(_:_:)

Evaluates a closure while ensuring that the given instance is not destroyed before the closure returns.

Declaration

func withExtendedLifetime<T, E, Result>(_ x: borrowing T, _ body: () throws(E) -> Result) throws(E) -> Result where E : Error, T : ~Copyable, T : ~Escapable, Result : ~Copyable

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.

Return Value

The return value, if any, of the body closure parameter.

See Also

Reference Counting