Define and implement CXXNoexceptExpr. Create it in Sema.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113623 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 88e047d..2fc08da 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -1235,6 +1235,12 @@
      << E->getQueriedType().getAsString(Policy) << ")";
 }
 
+void StmtPrinter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
+  OS << "noexcept(";
+  PrintExpr(E->getOperand());
+  OS << ")";
+}
+
 // Obj-C
 
 void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {