Describe operations on [weak] and [unowned] values.
Describe operations on [weak] and [unowned] values.

Swift SVN r7221

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