/* 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.

 */

#include "misc/Interval.h"

#include "support/CPPUtils.h"

#include "CharStream.h"

#include "Lexer.h"

#include "LexerNoViableAltException.h"

using namespace antlr4;

LexerNoViableAltException::LexerNoViableAltException(Lexer *lexer, CharStream *input, size_t startIndex,

                                                     atn::ATNConfigSet *deadEndConfigs)

  : RecognitionException(lexer, input, nullptr, nullptr), _startIndex(startIndex), _deadEndConfigs(deadEndConfigs) {

}

size_t LexerNoViableAltException::getStartIndex() {

  return _startIndex;

}

atn::ATNConfigSet* LexerNoViableAltException::getDeadEndConfigs() {

  return _deadEndConfigs;

}

std::string LexerNoViableAltException::toString() {

  std::string symbol;

  if (_startIndex < getInputStream()->size()) {

    symbol = static_cast<CharStream *>(getInputStream())->getText(misc::Interval(_startIndex, _startIndex));

    symbol = antlrcpp::escapeWhitespace(symbol, false);

  }

  std::string format = "LexerNoViableAltException('" + symbol + "')";

  return format;

}