46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
/* 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 "ParserRuleContext.h"
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namespace antlr4 {
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/**
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* This class extends {@link ParserRuleContext} by allowing the value of
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* {@link #getRuleIndex} to be explicitly set for the context.
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*
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* <p>
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* {@link ParserRuleContext} does not include field storage for the rule index
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* since the context classes created by the code generator override the
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* {@link #getRuleIndex} method to return the correct value for that context.
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* Since the parser interpreter does not use the context classes generated for a
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* parser, this class (with slightly more memory overhead per node) is used to
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* provide equivalent functionality.</p>
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*/
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class ANTLR4CPP_PUBLIC InterpreterRuleContext : public ParserRuleContext {
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public:
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InterpreterRuleContext();
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/**
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* Constructs a new {@link InterpreterRuleContext} with the specified
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* parent, invoking state, and rule index.
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*
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* @param parent The parent context.
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* @param invokingStateNumber The invoking state number.
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* @param ruleIndex The rule index for the current context.
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*/
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InterpreterRuleContext(ParserRuleContext *parent, size_t invokingStateNumber, size_t ruleIndex);
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virtual size_t getRuleIndex() const override;
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protected:
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/** This is the backing field for {@link #getRuleIndex}. */
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const size_t _ruleIndex = INVALID_INDEX;
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};
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} // namespace antlr4
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