44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
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/* 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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#pragma once
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#include "atn/PredictionContext.h"
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namespace antlr4 {
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namespace atn {
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class SingletonPredictionContext;
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class ANTLR4CPP_PUBLIC ArrayPredictionContext : public PredictionContext {
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public:
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/// Parent can be empty only if full ctx mode and we make an array
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/// from EMPTY and non-empty. We merge EMPTY by using null parent and
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/// returnState == EMPTY_RETURN_STATE.
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// Also here: we use a strong reference to our parents to avoid having them freed prematurely.
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// See also SinglePredictionContext.
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const std::vector<Ref<PredictionContext>> parents;
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/// Sorted for merge, no duplicates; if present, EMPTY_RETURN_STATE is always last.
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const std::vector<size_t> returnStates;
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ArrayPredictionContext(Ref<SingletonPredictionContext> const& a);
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ArrayPredictionContext(std::vector<Ref<PredictionContext>> const& parents_, std::vector<size_t> const& returnStates);
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virtual ~ArrayPredictionContext();
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virtual bool isEmpty() const override;
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virtual size_t size() const override;
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virtual Ref<PredictionContext> getParent(size_t index) const override;
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virtual size_t getReturnState(size_t index) const override;
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bool operator == (const PredictionContext &o) const override;
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virtual std::string toString() const override;
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};
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} // namespace atn
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} // namespace antlr4
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