[SR-5018] Mark +new as SWIFT_UNAVAILABLE when -init is SWIFT_UNAVAILABLE.

[belkadan]

Previous ID	SR-5018
Radar	rdar://problem/32405588
Original Reporter	@belkadan
Type	Bug
Status	Resolved
Resolution	Done

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, PrintAsObjC, StarterBug
Assignee	@JaviSoto
Priority	Medium

md5: 1bd3c0ab436a3a00f70df1435d7ca4d0

is duplicated by:

• SR-6060 +new not marked SWIFT_UNAVAILABLE when -init is unavailable when using required

Issue Description:

In Objective-C, [SomeClass new] is shorthand for [[SomeClass alloc] init] when SomeClass is an NSObject subclass. As such, if we're marking the no-argument initializer unavailable in Objective-C, we should do the same for +new. (The place we detect this is printAbstractFunctionAsMethod in PrintAsObjC.cpp, but that may not be the best place to print another declaration.)

[JaviSoto]

lembacon (JIRA User) unaware that there was already an in-progress ticket for this I had started working on it. Are you still working on this?

[JaviSoto]

The tests are passing on my patch, so I decided to create a PR for it: #12295 but feel free to close it in favor of yours if you already had something in the works!