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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/LexerAction.h"
#include "atn/LexerActionType.h"
namespace antlr4 {
namespace atn {
/// <summary>
/// Implements the {@code popMode} lexer action by calling <seealso cref="Lexer#popMode"/>.
///
/// <para>The {@code popMode} command does not have any parameters, so this action is
/// implemented as a singleton instance exposed by <seealso cref="#INSTANCE"/>.</para>
///
/// @author Sam Harwell
/// @since 4.2
/// </summary>
class ANTLR4CPP_PUBLIC LexerPopModeAction final : public LexerAction {
public:
static bool is(const LexerAction &lexerAction) { return lexerAction.getActionType() == LexerActionType::POP_MODE; }
static bool is(const LexerAction *lexerAction) { return lexerAction != nullptr && is(*lexerAction); }
/// <summary>
/// Provides a singleton instance of this parameterless lexer action.
/// </summary>
static const Ref<const LexerPopModeAction>& getInstance();
/// <summary>
/// {@inheritDoc}
///
/// <para>This action is implemented by calling <seealso cref="Lexer#popMode"/>.</para>
/// </summary>
void execute(Lexer *lexer) const override;
bool equals(const LexerAction &other) const override;
std::string toString() const override;
protected:
size_t hashCodeImpl() const override;
private:
/// Constructs the singleton instance of the lexer {@code popMode} command.
LexerPopModeAction() : LexerAction(LexerActionType::POP_MODE, false) {}
};
} // namespace atn
} // namespace antlr4
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