| // RUN: %target-typecheck-verify-swift %s | |
| protocol _UnicodeParser_ { | |
| associatedtype Encoding: _UnicodeEncoding_ | |
| } | |
| protocol _UnicodeEncoding_ { | |
| associatedtype CodeUnit : BinaryInteger_ | |
| associatedtype ForwardParser : _UnicodeParser_ | |
| where ForwardParser.Encoding == Self | |
| } | |
| protocol BinaryInteger_ { | |
| associatedtype Words: Collection_ where Words.Index == Int_ | |
| } | |
| protocol Collection_ { | |
| associatedtype Index: Comparable_ | |
| } | |
| protocol Comparable_ {} | |
| struct Int_: Comparable_ {} |