> On Jun 30, 2017, at 11:47 AM, Mike Ferenduros via swift-users
> <[email protected]> wrote:
>
> I'm doing a RAII sort of thing with an object, and would like to keep it
> alive until an completion-block is called (asynchronously).
>
> Is it sufficient to say '_ = x' in the completion-block to keep a live
> reference to the object?
>
> I was told that the optimiser is free to discard this line, and thus the
> object could be freed prematurely depending on how the code is compiled. If
> so, is there an idiomatic way to do this? Or should I just avoid RAII in
> Swift?
`withExtendedLifetime(x) { ... }` is the supported way of extending the
lifetime of an object.
-Joe
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