C1X: implement generic selections

As an extension, generic selection support has been added for all
supported languages.  The syntax is the same as for C1X.

llvm-svn: 129554

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/lib/AST/StmtPrinter.cpp b/clang/lib/AST/StmtPrinter.cpp
index 37010a0358d..89631261dcc 100644
--- a/clang/lib/AST/StmtPrinter.cpp
+++ b/clang/lib/AST/StmtPrinter.cpp
@@ -737,6 +737,23 @@ void StmtPrinter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *Node){
     PrintExpr(Node->getArgumentExpr());
   }
 }
+
+void StmtPrinter::VisitGenericSelectionExpr(GenericSelectionExpr *Node) {
+  OS << "_Generic(";
+  PrintExpr(Node->getControllingExpr());
+  for (unsigned i = 0; i != Node->getNumAssocs(); ++i) {
+    OS << ", ";
+    QualType T = Node->getAssocType(i);
+    if (T.isNull())
+      OS << "default";
+    else
+      OS << T.getAsString(Policy);
+    OS << ": ";
+    PrintExpr(Node->getAssocExpr(i));
+  }
+  OS << ")";
+}
+
 void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
   PrintExpr(Node->getLHS());
   OS << "[";