--- /dev/null
+/* 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/LexerAction.h"
+#include "atn/LexerActionType.h"
+
+namespace antlr4 {
+namespace atn {
+
+ /// <summary>
+ /// Implements the {@code mode} lexer action by calling <seealso cref="Lexer#mode"/> with
+ /// the assigned mode.
+ ///
+ /// @author Sam Harwell
+ /// @since 4.2
+ /// </summary>
+ class ANTLR4CPP_PUBLIC LexerModeAction final : public LexerAction {
+ public:
+ /// <summary>
+ /// Constructs a new {@code mode} action with the specified mode value. </summary>
+ /// <param name="mode"> The mode value to pass to <seealso cref="Lexer#mode"/>. </param>
+ LexerModeAction(int mode);
+
+ /// <summary>
+ /// Get the lexer mode this action should transition the lexer to.
+ /// </summary>
+ /// <returns> The lexer mode for this {@code mode} command. </returns>
+ int getMode();
+
+ /// <summary>
+ /// {@inheritDoc} </summary>
+ /// <returns> This method returns <seealso cref="LexerActionType#MODE"/>. </returns>
+ virtual LexerActionType getActionType() const override;
+
+ /// <summary>
+ /// {@inheritDoc} </summary>
+ /// <returns> This method returns {@code false}. </returns>
+ virtual bool isPositionDependent() const override;
+
+ /// <summary>
+ /// {@inheritDoc}
+ ///
+ /// <para>This action is implemented by calling <seealso cref="Lexer#mode"/> with the
+ /// value provided by <seealso cref="#getMode"/>.</para>
+ /// </summary>
+ virtual void execute(Lexer *lexer) override;
+
+ virtual size_t hashCode() const override;
+ virtual bool operator == (const LexerAction &obj) const override;
+ virtual std::string toString() const override;
+
+ private:
+ const int _mode;
+ };
+
+} // namespace atn
+} // namespace antlr4