﻿/* 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 "RecognitionException.h"
#include "atn/ATNConfigSet.h"

namespace antlr4 {

  class ANTLR4CPP_PUBLIC LexerNoViableAltException : public RecognitionException {
  public:
    LexerNoViableAltException(Lexer *lexer, CharStream *input, size_t startIndex,
                              atn::ATNConfigSet *deadEndConfigs);

    virtual size_t getStartIndex();
    virtual atn::ATNConfigSet* getDeadEndConfigs();
    virtual std::string toString();

  private:
    /// Matching attempted at what input index?
    const size_t _startIndex;

    /// Which configurations did we try at input.index() that couldn't match input.LA(1)?
    atn::ATNConfigSet *_deadEndConfigs;

  };

} // namespace antlr4