Implement assignment on protocol types.
Implement assignment on protocol types.

Swift SVN r1896

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