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/OrderedATNConfigSet.h

@@ -0,0 +1,25 @@
+/* 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/ATNConfigSet.h"
+#include "atn/ATNConfig.h"
+
+namespace antlr4 {
+namespace atn {
+
+  class ANTLR4CPP_PUBLIC OrderedATNConfigSet final : public ATNConfigSet {
+  public:
+    OrderedATNConfigSet() = default;
+
+  private:
+    size_t hashCode(const ATNConfig &atnConfig) const override;
+
+    bool equals(const ATNConfig &lhs, const ATNConfig &rhs) const override;
+  };
+
+} // namespace atn
+} // namespace antlr4