Bug 27846 - NSObject with protocol reference creates C# generic type reference
Summary: NSObject with protocol reference creates C# generic type reference
Alias: None
Product: Objective Sharpie
Classification: Desktop
Component: General ()
Version: 2.0.3
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Aaron Bockover [MSFT]
Depends on:
Reported: 2015-03-10 18:40 UTC by Dave Dunkin
Modified: 2015-03-11 01:49 UTC (History)
0 users

Is this bug a regression?: ---
Last known good build:

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Description Dave Dunkin 2015-03-10 18:40:49 UTC
A method with an ObjC parameter type NSObject<MyProtocol> * will map to a C# type of NSObject<MyProtocol>, but it should be just MyProtocol. Here's an example from trying to bind Crashlytics.framework:

// @interface Crashlytics : NSObject
[BaseType (typeof(NSObject))]
interface Crashlytics
	// +(Crashlytics *)startWithAPIKey:(NSString *)apiKey delegate:(NSObject<CrashlyticsDelegate> *)delegate;
	[Export ("startWithAPIKey:delegate:")]
	Crashlytics StartWithAPIKey (string apiKey, NSObject<CrashlyticsDelegate> @delegate);

// @protocol CrashlyticsDelegate <NSObject>
[Protocol, Model]
[BaseType (typeof(NSObject))]
interface CrashlyticsDelegate
Comment 1 Aaron Bockover [MSFT] 2015-03-11 01:49:56 UTC
Fixed. ObjC protocols with a single qualifier will be promoted to a concrete interface. Protocols with multiple qualifiers will be bound as NSObject<> generic types, which AFAIK are actually not valid currently in Xamarin iOS/Mac, but at least from a binding auditing perspective is more clear - the user can verify to which qualifier the type should promote.