Reduce by one the number of times we walk the AST in type-checking.
Reduce by one the number of times we walk the AST in type-checking.



Swift SVN r1983

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