32 lines
1007 B
C++
Executable File
32 lines
1007 B
C++
Executable File
/* 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 "antlr4-common.h"
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namespace antlr4 {
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namespace tree {
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class ANTLR4CPP_PUBLIC ParseTreeWalker {
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public:
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static ParseTreeWalker &DEFAULT;
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virtual ~ParseTreeWalker();
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virtual void walk(ParseTreeListener *listener, ParseTree *t) const;
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protected:
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/// The discovery of a rule node, involves sending two events: the generic
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/// <seealso cref="ParseTreeListener#enterEveryRule"/> and a
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/// <seealso cref="RuleContext"/>-specific event. First we trigger the generic and then
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/// the rule specific. We do them in reverse order upon finishing the node.
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virtual void enterRule(ParseTreeListener *listener, ParseTree *r) const;
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virtual void exitRule(ParseTreeListener *listener, ParseTree *r) const;
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};
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} // namespace tree
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} // namespace antlr4
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