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[SR-5575] Swift -> Obj-C boxing results in loss of type info #48147

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swift-ci opened this issue Jul 28, 2017 · 0 comments
Closed

[SR-5575] Swift -> Obj-C boxing results in loss of type info #48147

swift-ci opened this issue Jul 28, 2017 · 0 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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Previous ID SR-5575
Radar None
Original Reporter Moose (JIRA User)
Type Bug
Status Resolved
Resolution Duplicate
Environment

Xcode 8.3.3 & Xcode 9 beta (9M136h)

Additional Detail from JIRA
Votes 0
Component/s
Labels Bug
Assignee None
Priority Medium

md5: c1a0118c2ec225925315a8986d1c2e66

duplicates:

  • SR-3871 Protocol passing via objective-c / Any can't be cast back to protocol type

Issue Description:

protocol Foo {}
struct Bar: Foo {}

let array = NSArray(array: [Bar()])

print(array.firstObject is Bar) // true
print(array.firstObject is Foo) // false
@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.
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