/* 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 "Parser.h"

#include "NoViableAltException.h"

using namespace antlr4;

namespace {

// Create a normal shared pointer if the configurations are to be deleted. If not, then

// the shared pointer is created with a deleter that does nothing.

Ref<atn::ATNConfigSet> buildConfigsRef(atn::ATNConfigSet *configs, bool deleteConfigs) {

  if (deleteConfigs) {

    return Ref<atn::ATNConfigSet>(configs);

  } else {

    return Ref<atn::ATNConfigSet>(configs, [](atn::ATNConfigSet *){});

  }

}

}

NoViableAltException::NoViableAltException(Parser *recognizer)

  : NoViableAltException(recognizer, recognizer->getTokenStream(), recognizer->getCurrentToken(),

                         recognizer->getCurrentToken(), nullptr, recognizer->getContext(), false) {

}

NoViableAltException::NoViableAltException(Parser *recognizer, TokenStream *input,Token *startToken,

  Token *offendingToken, atn::ATNConfigSet *deadEndConfigs, ParserRuleContext *ctx, bool deleteConfigs)

  : RecognitionException("No viable alternative", recognizer, input, ctx, offendingToken),

    _deadEndConfigs(buildConfigsRef(deadEndConfigs, deleteConfigs)), _startToken(startToken) {

}

NoViableAltException::~NoViableAltException() {

}

Token* NoViableAltException::getStartToken() const {

  return _startToken;

}

atn::ATNConfigSet* NoViableAltException::getDeadEndConfigs() const {

  return _deadEndConfigs.get();

}