add antlr source code and ReadMe

[toc] / antlr4-cpp-runtime-4.9.2-source / runtime / src / atn / PlusBlockStartState.h

diff --git a/antlr4-cpp-runtime-4.9.2-source/runtime/src/atn/PlusBlockStartState.h b/antlr4-cpp-runtime-4.9.2-source/runtime/src/atn/PlusBlockStartState.h
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+++ b/antlr4-cpp-runtime-4.9.2-source/runtime/src/atn/PlusBlockStartState.h
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+/* 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/BlockStartState.h"
+
+namespace antlr4 {
+namespace atn {
+
+  /// Start of {@code (A|B|...)+} loop. Technically a decision state, but
+  /// we don't use for code generation; somebody might need it, so I'm defining
+  /// it for completeness. In reality, the <seealso cref="PlusLoopbackState"/> node is the
+  /// real decision-making note for {@code A+}.
+  class ANTLR4CPP_PUBLIC PlusBlockStartState final : public BlockStartState {
+  public:
+    PlusLoopbackState *loopBackState = nullptr;
+
+    virtual size_t getStateType() override;
+  };
+
+} // namespace atn
+} // namespace antlr4