Rename Selector::getName() to Selector::getAsString(), and add
a new NamedDecl::getAsString() method.

Change uses of Selector::getName() to just pass in a Selector 
where possible (e.g. to diagnostics) instead of going through
an std::string.

This also adds new formatters for objcinstance and objcclass
as described in the dox.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59933 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 94cfae9..8a7d3eb 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -988,7 +988,7 @@
 }
 
 void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
-  OS << "@selector(" << Node->getSelector().getName() << ")";
+  OS << "@selector(" << Node->getSelector().getAsString() << ")";
 }
 
 void StmtPrinter::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {