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return type
Objective-C NSString has a class method stringWithUTF8String that creates a new
NSString from a C string. Objective-C box expression @(...) can be used to
create an NSString instead of invoking the stringWithUTF8String method directly
(The compiler lowers it down to the invocation though). This commit ensures that
the type of @(string-value) gets the same nullability attributes as the return
type of stringWithUTF8String to ensure that the diagnostics are consistent
between the two.
rdar://33847186
Differential Revision: https://reviews.llvm.org/D39762
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@317727 91177308-0d34-0410-b5e6-96231b3b80d8
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