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[SR-4516] Something goes badly wrong with enum to protocol casting #47093

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iby opened this issue Apr 6, 2017 · 4 comments
Closed

[SR-4516] Something goes badly wrong with enum to protocol casting #47093

iby opened this issue Apr 6, 2017 · 4 comments
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@tbkka
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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@iby
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iby commented Apr 6, 2017

Previous ID SR-4516
Radar None
Original Reporter @iby
Type Bug
Status Resolved
Resolution Done

Attachment: Download

Additional Detail from JIRA
Votes 0
Component/s
Labels Bug
Assignee @tbkka
Priority Medium

md5: caeb040fa8113d028f7c0142618f8e29

duplicates:

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

Issue Description:

Swift fails to cast enum into protocol passed into NSViewController as represented object, but successfully casts classes into the same protocol. Below example illustrates the issue.
@belkadan
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belkadan commented Apr 6, 2017

@jckarter, I think we just saw one like this? We don't cast back to the value type before checking for protocol conformance?

@jckarter
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jckarter commented Apr 6, 2017

Yeah, this looks like a dup of SR-3871.

@tbkka
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tbkka commented Jan 15, 2020

This was closed as a dup of SR-3871, but the current implementation actually uses different code paths for these cases. Re-opening and assigning it to myself so I can track these various related dynamic casting issues.

@tbkka
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tbkka commented Jan 29, 2020

Ah. It really is a dupe of SR-3871. Closing again.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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@tbkka tbkka

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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.
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@jckarter @belkadan @iby @tbkka