64 lines
2.7 KiB
C++
64 lines
2.7 KiB
C++
// Copyright 2012-2022 The ANTLR Project
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//
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// Redistribution and use in source and binary forms, with or without modification, are permitted
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// provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of conditions
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// and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list of
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// conditions and the following disclaimer in the documentation and/or other materials provided
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// with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be used to
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// endorse or promote products derived from this software without specific prior written
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// permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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// WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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#include "atn/PredictionContext.h"
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#include "FlatHashSet.h"
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namespace antlr4 {
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namespace atn {
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class ANTLR4CPP_PUBLIC PredictionContextCache final {
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public:
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PredictionContextCache() = default;
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PredictionContextCache(const PredictionContextCache&) = delete;
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PredictionContextCache(PredictionContextCache&&) = delete;
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PredictionContextCache& operator=(const PredictionContextCache&) = delete;
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PredictionContextCache& operator=(PredictionContextCache&&) = delete;
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void put(const Ref<const PredictionContext> &value);
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Ref<const PredictionContext> get(const Ref<const PredictionContext> &value) const;
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private:
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struct ANTLR4CPP_PUBLIC PredictionContextHasher final {
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size_t operator()(const Ref<const PredictionContext> &predictionContext) const;
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};
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struct ANTLR4CPP_PUBLIC PredictionContextComparer final {
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bool operator()(const Ref<const PredictionContext> &lhs,
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const Ref<const PredictionContext> &rhs) const;
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};
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FlatHashSet<Ref<const PredictionContext>,
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PredictionContextHasher, PredictionContextComparer> _data;
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};
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} // namespace atn
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} // namespace antlr4
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