build(antlr): 引入第三方 ANTLR4 runtime/tool 并接入构建

third_party/antlr4-runtime-4.13.2/runtime/src/atn/BasicState.h

@@ -0,0 +1,23 @@
+/* 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 "atn/ATNState.h"
+
+namespace antlr4 {
+namespace atn {
+
+  class ANTLR4CPP_PUBLIC BasicState final : public ATNState {
+  public:
+    static bool is(const ATNState &atnState) { return atnState.getStateType() == ATNStateType::BASIC; }
+
+    static bool is(const ATNState *atnState) { return atnState != nullptr && is(*atnState); }
+
+    BasicState() : ATNState(ATNStateType::BASIC) {}
+  };
+
+} // namespace atn
+} // namespace antlr4