Invokes the given closure with a pointer to the given argument.
- Xcode 10.0+
- Swift Standard Library
An instance to temporarily use via pointer.
A closure that takes a pointer to
valueas its sole argument. If the closure has a return value, that value is also used as the return value of the
withfunction. The pointer argument is valid only for the duration of the function’s execution. It is undefined behavior to try to mutate through the pointer argument by converting it to
Unsafe Pointer(to: _:)
Unsafeor any other mutable pointer type. If you need to mutate the argument through the pointer, use
Unsafe Mutable Pointer(to: _:)
The return value, if any, of the
with function is useful for calling Objective-C APIs that take in parameters by const pointer.
The pointer argument to
body is valid only during the execution of
with. Do not store or return the pointer for later use.