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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.
*/
#include "atn/ATNSimulator.h"
#include "atn/ATNConfigSet.h"
#include "atn/ATNDeserializer.h"
#include "atn/ATNType.h"
#include "dfa/DFAState.h"
using namespace antlr4;
using namespace antlr4::dfa;
using namespace antlr4::atn;
const Ref<DFAState> ATNSimulator::ERROR = std::make_shared<DFAState>(std::numeric_limits<int>::max());
ATNSimulator::ATNSimulator(const ATN &atn, PredictionContextCache &sharedContextCache)
: atn(atn), _sharedContextCache(sharedContextCache) {}
void ATNSimulator::clearDFA() {
throw UnsupportedOperationException("This ATN simulator does not support clearing the DFA.");
}
PredictionContextCache& ATNSimulator::getSharedContextCache() const {
return _sharedContextCache;
}
Ref<const PredictionContext> ATNSimulator::getCachedContext(const Ref<const PredictionContext> &context) {
// This function must only be called with an active state lock, as we are going to change a shared structure.
return PredictionContext::getCachedContext(context, getSharedContextCache());
}
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