Mark Lacey a61a6d536e Conditionalize warnings for IUO-to-Any coercion on Swift version. ...

These warnings are turning out to be pretty noisy for code that
declares IUOs (e.g. for @IBOutlets) and then passes them to
Objective-C APIs with parameters declared as _Nonnull id.

Since we bridge non-nil values successfully in most cases, and
previuosly written and correctly executing code is either not seeing
nil values passed in or are handling the nil (which is bridged as
NSNull), it seems like a nuisance to warn about these for existing
Swift versions.

We'll conditionalize the warning, and then users can deal with these
when moving to the new language version.

Fixes: rdar://problem/39886178

2018-05-07 15:49:56 -07:00

3.6 KiB

Raw Blame History

View Raw