Initial commit from sysy-main

antlr/antlr4-runtime-4.12.0/runtime/src/tree/ErrorNode.h

@@ -0,0 +1,24 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#pragma once
+
+#include "tree/TerminalNode.h"
+
+namespace antlr4 {
+namespace tree {
+
+  class ANTLR4CPP_PUBLIC ErrorNode : public TerminalNode {
+  public:
+    static bool is(const tree::ParseTree &parseTree) { return parseTree.getTreeType() == tree::ParseTreeType::ERROR; }
+
+    static bool is(const tree::ParseTree *parseTree) { return parseTree != nullptr && is(*parseTree); }
+
+  protected:
+    using TerminalNode::TerminalNode;
+  };
+
+} // namespace tree
+} // namespace antlr4