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[SR-1320] invalid compile error: error: circular class inheritance #43928

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drewcrawford opened this issue Apr 26, 2016 · 2 comments
Closed

[SR-1320] invalid compile error: error: circular class inheritance #43928

drewcrawford opened this issue Apr 26, 2016 · 2 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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@drewcrawford
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Previous ID SR-1320
Radar None
Original Reporter @drewcrawford
Type Bug
Status Resolved
Resolution Done
Environment

swift-DEVELOPMENT-SNAPSHOT-2016-04-25-a, OSX 10.11

This behavior was not present in swift-DEVELOPMENT-SNAPSHOT-2016-04-12-a or Swift 2.2

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

md5: 3ea59d1551cb1dba4a54feb3496fc53c

Issue Description:

protocol C : class {
    associatedtype CN
}
protocol N {
    associatedtype NN
}

final class T {}
final class S {}
extension T : C {
    typealias CN = T.NN
}

extension T : N {
    typealias NN = S
}

Expected behavior: compile

Actual behavior:

error: circular class inheritance T
    typealias CN = T.NN
@krzyzanowskim
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I have the same with different syntax with snapshot 2016-06-06

final class Foo {
   let variant:Foo.Variant // error: circular class inheritance Foo

   enum Variant: RawRepresentable {
      // ...
   }
}

@slavapestov
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Error is gone in 3.0 and master.

@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. compiler The Swift compiler in itself
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3 participants
@slavapestov @drewcrawford @krzyzanowskim