forked from NUDT-compiler/nudt-compiler-cpp
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34 lines
1.2 KiB
34 lines
1.2 KiB
/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
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* Use of this file is governed by the BSD 3-clause license that
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* can be found in the LICENSE.txt file in the project root.
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*/
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#include "atn/ATNSimulator.h"
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#include "atn/ATNConfigSet.h"
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#include "atn/ATNDeserializer.h"
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#include "atn/ATNType.h"
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#include "dfa/DFAState.h"
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using namespace antlr4;
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using namespace antlr4::dfa;
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using namespace antlr4::atn;
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const Ref<DFAState> ATNSimulator::ERROR = std::make_shared<DFAState>(std::numeric_limits<int>::max());
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ATNSimulator::ATNSimulator(const ATN &atn, PredictionContextCache &sharedContextCache)
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: atn(atn), _sharedContextCache(sharedContextCache) {}
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void ATNSimulator::clearDFA() {
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throw UnsupportedOperationException("This ATN simulator does not support clearing the DFA.");
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}
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PredictionContextCache& ATNSimulator::getSharedContextCache() const {
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return _sharedContextCache;
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}
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Ref<const PredictionContext> ATNSimulator::getCachedContext(const Ref<const PredictionContext> &context) {
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// This function must only be called with an active state lock, as we are going to change a shared structure.
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return PredictionContext::getCachedContext(context, getSharedContextCache());
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}
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