FunctionSwift

withExtendedLifetime(_:_:)

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

func withExtendedLifetime<T, Result>(_ x: T, _ body: (T) throws -> Result) rethrows -> Result

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.