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author | vitalyisaev <vitalyisaev@ydb.tech> | 2023-11-30 13:26:22 +0300 |
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committer | vitalyisaev <vitalyisaev@ydb.tech> | 2023-11-30 15:44:45 +0300 |
commit | 0a98fece5a9b54f16afeb3a94b3eb3105e9c3962 (patch) | |
tree | 291d72dbd7e9865399f668c84d11ed86fb190bbf /contrib/libs/antlr4_cpp_runtime/src/atn/SingletonPredictionContext.h | |
parent | cb2c8d75065e5b3c47094067cb4aa407d4813298 (diff) | |
download | ydb-0a98fece5a9b54f16afeb3a94b3eb3105e9c3962.tar.gz |
YQ Connector:Use docker-compose in integrational tests
Diffstat (limited to 'contrib/libs/antlr4_cpp_runtime/src/atn/SingletonPredictionContext.h')
-rw-r--r-- | contrib/libs/antlr4_cpp_runtime/src/atn/SingletonPredictionContext.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/contrib/libs/antlr4_cpp_runtime/src/atn/SingletonPredictionContext.h b/contrib/libs/antlr4_cpp_runtime/src/atn/SingletonPredictionContext.h new file mode 100644 index 0000000000..1784c4f045 --- /dev/null +++ b/contrib/libs/antlr4_cpp_runtime/src/atn/SingletonPredictionContext.h @@ -0,0 +1,43 @@ +/* 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. + */ + +#pragma once + +#include "atn/PredictionContext.h" + +namespace antlr4 { +namespace atn { + + class ANTLR4CPP_PUBLIC SingletonPredictionContext final : public PredictionContext { + public: + static bool is(const PredictionContext &predictionContext) { return predictionContext.getContextType() == PredictionContextType::SINGLETON; } + + static bool is(const PredictionContext *predictionContext) { return predictionContext != nullptr && is(*predictionContext); } + + static Ref<const SingletonPredictionContext> create(Ref<const PredictionContext> parent, size_t returnState); + + // Usually a parent is linked via a weak ptr. Not so here as we have kinda reverse reference chain. + // There are no child contexts stored here and often the parent context is left dangling when it's + // owning ATNState is released. In order to avoid having this context released as well (leaving all other contexts + // which got this one as parent with a null reference) we use a shared_ptr here instead, to keep those left alone + // parent contexts alive. + const Ref<const PredictionContext> parent; + const size_t returnState; + + SingletonPredictionContext(Ref<const PredictionContext> parent, size_t returnState); + + bool isEmpty() const override; + size_t size() const override; + const Ref<const PredictionContext>& getParent(size_t index) const override; + size_t getReturnState(size_t index) const override; + bool equals(const PredictionContext &other) const override; + std::string toString() const override; + + protected: + size_t hashCodeImpl() const override; + }; + +} // namespace atn +} // namespace antlr4 |