Allow CharSourceRange to peek the underlying text, need this for rdar://22857642
Allow CharSourceRange to peek the underlying text, need this for rdar://22857642

Swift SVN r32320

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