Sema: Allow checked conversions from non-@objc classes to @objc protocols.
Sema: Allow checked conversions from non-@objc classes to @objc protocols.

No reason to constrain it to @objc classes—native Swift classes can conform to @objc protocols and be checked at runtime for conformance too.

Swift SVN r14804

sschiau/swift,cbrentharris/swift,russbishop/swift,manavgabhawala/swift,OscarSwanros/swift,cbrentharris/swift,MukeshKumarS/Swift,xedin/swift,tkremenek/swift,gregomni/swift,austinzheng/swift,CodaFi/swift,johnno1962d/swift,aschwaighofer/swift,SwiftAndroid/swift,LeoShimonaka/swift,emilstahl/swift,gribozavr/swift,karwa/swift,SwiftAndroid/swift,swiftix/swift,khizkhiz/swift,CodaFi/swift,zisko/swift,milseman/swift,gregomni/swift,lorentey/swift,Ivacker/swift,Jnosh/swift,arvedviehweger/swift,kentya6/swift,jckarter/swift,danielmartin/swift,benlangmuir/swift,danielmartin/swift,mightydeveloper/swift,xedin/swift,dduan/swift,felix91gr/swift,kentya6/swift,amraboelela/swift,gregomni/swift,hooman/swift,bitjammer/swift,calebd/swift,ahoppen/swift,JaSpa/swift,hughbe/swift,gribozavr/swift,tardieu/swift,CodaFi/swift,sdulal/swift,brentdax/swift,shahmishal/swift,hughbe/swift,alblue/swift,mightydeveloper/swift,Ivacker/swift,tardieu/swift,hooman/swift,tardieu/swift,amraboelela/swift,kstaring/swift,johnno1962d/swift,practicalswift/swift,danielmartin/swift,kstaring/swift,frootloops/swift,tardieu/swift,benlangmuir/swift,aschwaighofer/swift,allevato/swift,kusl/swift,MukeshKumarS/Swift,kperryua/swift,atrick/swift,frootloops/swift,parkera/swift,khizkhiz/swift,tkremenek/swift,kstaring/swift,aschwaighofer/swift,stephentyrone/swift,jopamer/swift,dduan/swift,calebd/swift,khizkhiz/swift,huonw/swift,benlangmuir/swift,gottesmm/swift,kentya6/swift,harlanhaskins/swift,roambotics/swift,deyton/swift,kentya6/swift,calebd/swift,roambotics/swift,adrfer/swift,karwa/swift,bitjammer/swift,swiftix/swift,parkera/swift,benlangmuir/swift,xedin/swift,shahmishal/swift,bitjammer/swift,karwa/swift,airspeedswift/swift,roambotics/swift,brentdax/swift,codestergit/swift,sschiau/swift,IngmarStein/swift,tinysun212/swift-windows,SwiftAndroid/swift,frootloops/swift,jtbandes/swift,airspeedswift/swift,khizkhiz/swift,therealbnut/swift,practicalswift/swift,aschwaighofer/swift,cbrentharris/swift,airspeedswift/swift,JGiola/swift,KrishMunot/swift,CodaFi/swift,therealbnut/swift,dduan/swift,swiftix/swift,tinysun212/swift-windows,ahoppen/swift,djwbrown/swift,kperryua/swift,cbrentharris/swift,gmilos/swift,airspeedswift/swift,therealbnut/swift,alblue/swift,kperryua/swift,OscarSwanros/swift,nathawes/swift,allevato/swift,brentdax/swift,practicalswift/swift,alblue/swift,JGiola/swift,kperryua/swift,felix91gr/swift,khizkhiz/swift,deyton/swift,xwu/swift,gmilos/swift,Ivacker/swift,modocache/swift,tkremenek/swift,return/swift,deyton/swift,cbrentharris/swift,tkremenek/swift,xwu/swift,allevato/swift,emilstahl/swift,zisko/swift,milseman/swift,devincoughlin/swift,hughbe/swift,karwa/swift,zisko/swift,airspeedswift/swift,kstaring/swift,LeoShimonaka/swift,hooman/swift,djwbrown/swift,kperryua/swift,slavapestov/swift,codestergit/swift,milseman/swift,Jnosh/swift,therealbnut/swift,sdulal/swift,milseman/swift,practicalswift/swift,manavgabhawala/swift,tkremenek/swift,KrishMunot/swift,gottesmm/swift,natecook1000/swift,deyton/swift,swiftix/swift.old,jckarter/swift,devincoughlin/swift,KrishMunot/swift,JGiola/swift,jtbandes/swift,modocache/swift,dreamsxin/swift,gmilos/swift,ken0nek/swift,modocache/swift,emilstahl/swift,sschiau/swift,harlanhaskins/swift,shajrawi/swift,sdulal/swift,shajrawi/swift,sschiau/swift,amraboelela/swift,tardieu/swift,kentya6/swift,nathawes/swift,slavapestov/swift,kentya6/swift,adrfer/swift,jckarter/swift,modocache/swift,glessard/swift,xwu/swift,tinysun212/swift-windows,djwbrown/swift,felix91gr/swift,slavapestov/swift,xedin/swift,felix91gr/swift,alblue/swift,stephentyrone/swift,devincoughlin/swift,brentdax/swift,stephentyrone/swift,Ivacker/swift,kentya6/swift,ben-ng/swift,jopamer/swift,JaSpa/swift,zisko/swift,apple/swift,stephentyrone/swift,devincoughlin/swift,jtbandes/swift,arvedviehweger/swift,stephentyrone/swift,therealbnut/swift,lorentey/swift,JGiola/swift,return/swift,huonw/swift,frootloops/swift,Ivacker/swift,devincoughlin/swift,Ivacker/swift,russbishop/swift,return/swift,xwu/swift,gmilos/swift,KrishMunot/swift,emilstahl/swift,dduan/swift,emilstahl/swift,jtbandes/swift,JGiola/swift,khizkhiz/swift,milseman/swift,manavgabhawala/swift,frootloops/swift,modocache/swift,hughbe/swift,atrick/swift,sdulal/swift,jmgc/swift,jopamer/swift,atrick/swift,atrick/swift,return/swift,JGiola/swift,cbrentharris/swift,djwbrown/swift,swiftix/swift.old,swiftix/swift,tinysun212/swift-windows,hughbe/swift,kentya6/swift,calebd/swift,OscarSwanros/swift,tjw/swift,apple/swift,jtbandes/swift,sdulal/swift,xedin/swift,Jnosh/swift,uasys/swift,rudkx/swift,rudkx/swift,kstaring/swift,calebd/swift,johnno1962d/swift,hooman/swift,jmgc/swift,uasys/swift,atrick/swift,CodaFi/swift,johnno1962d/swift,mightydeveloper/swift,gribozavr/swift,allevato/swift,shahmishal/swift,jmgc/swift,dduan/swift,arvedviehweger/swift,modocache/swift,bitjammer/swift,Ivacker/swift,ken0nek/swift,tardieu/swift,jopamer/swift,tjw/swift,emilstahl/swift,glessard/swift,aschwaighofer/swift,harlanhaskins/swift,tkremenek/swift,gribozavr/swift,karwa/swift,gregomni/swift,brentdax/swift,shahmishal/swift,mightydeveloper/swift,return/swift,codestergit/swift,nathawes/swift,practicalswift/swift,jtbandes/swift,therealbnut/swift,jckarter/swift,adrfer/swift,kusl/swift,practicalswift/swift,calebd/swift,OscarSwanros/swift,rudkx/swift,harlanhaskins/swift,Jnosh/swift,manavgabhawala/swift,sschiau/swift,ben-ng/swift,kusl/swift,parkera/swift,slavapestov/swift,uasys/swift,LeoShimonaka/swift,swiftix/swift,zisko/swift,jmgc/swift,jopamer/swift,jmgc/swift,russbishop/swift,Jnosh/swift,tjw/swift,kstaring/swift,apple/swift,dduan/swift,OscarSwanros/swift,djwbrown/swift,arvedviehweger/swift,natecook1000/swift,emilstahl/swift,MukeshKumarS/Swift,arvedviehweger/swift,russbishop/swift,SwiftAndroid/swift,jckarter/swift,stephentyrone/swift,uasys/swift,aschwaighofer/swift,russbishop/swift,ben-ng/swift,glessard/swift,tjw/swift,Jnosh/swift,ken0nek/swift,therealbnut/swift,natecook1000/swift,austinzheng/swift,CodaFi/swift,apple/swift,LeoShimonaka/swift,swiftix/swift.old,manavgabhawala/swift,lorentey/swift,sdulal/swift,MukeshKumarS/Swift,deyton/swift,CodaFi/swift,glessard/swift,LeoShimonaka/swift,JaSpa/swift,uasys/swift,glessard/swift,zisko/swift,IngmarStein/swift,allevato/swift,atrick/swift,xwu/swift,frootloops/swift,amraboelela/swift,huonw/swift,austinzheng/swift,karwa/swift,harlanhaskins/swift,benlangmuir/swift,hooman/swift,shahmishal/swift,gmilos/swift,airspeedswift/swift,Ivacker/swift,tinysun212/swift-windows,roambotics/swift,gribozavr/swift,ken0nek/swift,nathawes/swift,emilstahl/swift,gregomni/swift,kusl/swift,shajrawi/swift,benlangmuir/swift,tinysun212/swift-windows,JaSpa/swift,amraboelela/swift,Jnosh/swift,allevato/swift,uasys/swift,slavapestov/swift,xwu/swift,jmgc/swift,xedin/swift,jopamer/swift,lorentey/swift,dduan/swift,tardieu/swift,shahmishal/swift,huonw/swift,austinzheng/swift,johnno1962d/swift,KrishMunot/swift,jmgc/swift,IngmarStein/swift,danielmartin/swift,gottesmm/swift,rudkx/swift,kusl/swift,shajrawi/swift,hooman/swift,frootloops/swift,gmilos/swift,adrfer/swift,adrfer/swift,danielmartin/swift,nathawes/swift,slavapestov/swift,adrfer/swift,brentdax/swift,milseman/swift,IngmarStein/swift,austinzheng/swift,amraboelela/swift,alblue/swift,parkera/swift,glessard/swift,lorentey/swift,shajrawi/swift,kstaring/swift,tjw/swift,mightydeveloper/swift,mightydeveloper/swift,ahoppen/swift,gottesmm/swift,uasys/swift,johnno1962d/swift,lorentey/swift,tjw/swift,natecook1000/swift,harlanhaskins/swift,shahmishal/swift,ben-ng/swift,sschiau/swift,ken0nek/swift,parkera/swift,parkera/swift,austinzheng/swift,xwu/swift,JaSpa/swift,LeoShimonaka/swift,bitjammer/swift,khizkhiz/swift,natecook1000/swift,swiftix/swift.old,MukeshKumarS/Swift,zisko/swift,gottesmm/swift,ben-ng/swift,cbrentharris/swift,tkremenek/swift,shajrawi/swift,huonw/swift,slavapestov/swift,allevato/swift,practicalswift/swift,codestergit/swift,arvedviehweger/swift,IngmarStein/swift,stephentyrone/swift,SwiftAndroid/swift,apple/swift,ahoppen/swift,SwiftAndroid/swift,karwa/swift,hooman/swift,gribozavr/swift,gribozavr/swift,natecook1000/swift,devincoughlin/swift,kperryua/swift,rudkx/swift,huonw/swift,JaSpa/swift,arvedviehweger/swift,codestergit/swift,codestergit/swift,KrishMunot/swift,hughbe/swift,swiftix/swift.old,apple/swift,ken0nek/swift,russbishop/swift,felix91gr/swift,sschiau/swift,ken0nek/swift,LeoShimonaka/swift,swiftix/swift,sdulal/swift,felix91gr/swift,ahoppen/swift,JaSpa/swift,shajrawi/swift,gregomni/swift,kusl/swift,gottesmm/swift,OscarSwanros/swift,huonw/swift,swiftix/swift.old,rudkx/swift,swiftix/swift,danielmartin/swift,ahoppen/swift,roambotics/swift,jtbandes/swift,MukeshKumarS/Swift,manavgabhawala/swift,airspeedswift/swift,johnno1962d/swift,ben-ng/swift,lorentey/swift,codestergit/swift,nathawes/swift,kperryua/swift,LeoShimonaka/swift,djwbrown/swift,manavgabhawala/swift,karwa/swift,sdulal/swift,swiftix/swift.old,cbrentharris/swift,shahmishal/swift,xedin/swift,brentdax/swift,KrishMunot/swift,kusl/swift,calebd/swift,hughbe/swift,swiftix/swift.old,milseman/swift,parkera/swift,natecook1000/swift,roambotics/swift,russbishop/swift,felix91gr/swift,tinysun212/swift-windows,deyton/swift,bitjammer/swift,dreamsxin/swift,OscarSwanros/swift,jopamer/swift,kusl/swift,xedin/swift,gribozavr/swift,MukeshKumarS/Swift,austinzheng/swift,tjw/swift,alblue/swift,devincoughlin/swift,jckarter/swift,ben-ng/swift,devincoughlin/swift,nathawes/swift,djwbrown/swift,lorentey/swift,deyton/swift,IngmarStein/swift,mightydeveloper/swift,gmilos/swift,SwiftAndroid/swift,aschwaighofer/swift,alblue/swift,sschiau/swift,bitjammer/swift,harlanhaskins/swift,IngmarStein/swift,danielmartin/swift,jckarter/swift,modocache/swift,gottesmm/swift,amraboelela/swift,parkera/swift,practicalswift/swift,shajrawi/swift,adrfer/swift,mightydeveloper/swift,return/swift,return/swift