Thanks Jordan! I can definitely file an issue.
A better diagnostic would definitely help. James > On Sep 15, 2017, at 2:03 PM, Jordan Rose <jordan_r...@apple.com> wrote: > > Hi, James. The trick here is that the name you’ll get in Swift for these > methods is probably 'compareQuery(_:toQuery:)', because the Swift compiler > detects that the “result” is redundant with the type name. In Xcode 8 the > compiler didn’t check if you were using the “old" name to satisfy a protocol, > but Xcode 9 now does (for unrelated reasons). > > Since this is a source-breaking change, can you file an issue at > https://bugs.swift.org <https://bugs.swift.org/> ? At the very least we > should make the diagnostic better. > > You can always tell the Swift compiler you know better by using the > NS_SWIFT_NAME annotation to provide an alternate name, using Swift function > name syntax. > > Jordan > > >> On Sep 15, 2017, at 12:45, James Dempsey via swift-users >> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote: >> >> I am updating from Xcode 8 to Xcode 9, still using Swift 3. >> >> In my project I am getting warnings of the pattern: >> >> Unavailable instance method ‘compareQueryResult(_:toQueryResult:)’ was used >> to satisfy a requirement of protocol ‘ResultComparable’. >> >> My project uses an Obj-C++ framework to wrap C++ and expose it in Obj-C. >> >> The instance method in question is declared and implemented in a number of >> Obj-C classes in this framework. >> >> @interface DocumentQuery: Query { >> - (ComparisonResult)compareQueryResult:(DocumentResult *)result1 >> toQueryResult:(DocumentResult *)result2; >> } >> @end >> >> @interface GroupQuery: Query { >> - (ComparisonResult)compareQueryResult:(GroupResult *)result1 >> toQueryResult:(GroupResult *)result2; >> } >> @end >> >> >> >> Another framework imports the Obj-C++ framework. In this framework the >> protocol is defined in Swift with an associated type: >> >> public protocol ResultComparable >> { >> associatedtype ResultType >> func compareQueryResult(_ r1: ResultType, toQueryResult r2: ResultType) >> -> ComparisonResult >> } >> >> And conformance is declared: >> >> extension DocumentQuery: ResultComparable {} >> extension GroupQuery: ResultComparable {} >> >> >> This compiled without warnings in Xcode 8 / Swift 3, but they appear in >> Xcode 9 / Swift 3. Any help in understanding the issue and how to fix it >> would be greatly appreciated. >> >> James >> >> _______________________________________________ >> swift-users mailing list >> swift-users@swift.org <mailto:swift-users@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-users >
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