namespace llvm {
namespace yaml {
+/// pin the vtables to this file
+void Node::anchor() {}
+void NullNode::anchor() {}
+void ScalarNode::anchor() {}
+void KeyValueNode::anchor() {}
+void MappingNode::anchor() {}
+void SequenceNode::anchor() {}
+void AliasNode::anchor() {}
+
/// Token - A single YAML token.
struct Token : ilist_node<Token> {
enum TokenKind {