Allan Shortlidge 61111ed4fe AST: Fix macCatalyst availability for synthesized declarations. ...

The macCatalyst platform availability of a declaration may be inferred from the
iOS platform availability of that declaration in the absence of an explicit
macCatalyst availability attribute. This means that when inheriting macCatalyst
platform availability, the explict iOS availability of an inner ancestor should
take precedence over explicit macCatalyst availability of an outer ancestor.
The algorithm that computes inferred availability attributes for synthesized
declarations was treating macCatalyst and iOS as independent platforms, though,
sometimes yielding inapproparite macCatalyst availability.

Resolves rdar://107766644

2023-12-18 23:49:26 -08:00

7.3 KiB

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