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/* 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 "antlr4-common.h"
namespace antlr4 {
namespace tree {
/** This interface describes the minimal core of methods triggered
* by {@link ParseTreeWalker}. E.g.,
*
* ParseTreeWalker walker = new ParseTreeWalker();
* walker.walk(myParseTreeListener, myParseTree); <-- triggers events in your listener
*
* If you want to trigger events in multiple listeners during a single
* tree walk, you can use the ParseTreeDispatcher object available at
*
* https://github.com/antlr/antlr4/issues/841
*/
class ANTLR4CPP_PUBLIC ParseTreeListener {
public:
virtual ~ParseTreeListener();
virtual void visitTerminal(TerminalNode *node) = 0;
virtual void visitErrorNode(ErrorNode *node) = 0;
virtual void enterEveryRule(ParserRuleContext *ctx) = 0;
virtual void exitEveryRule(ParserRuleContext *ctx) = 0;
bool operator == (const ParseTreeListener &other) {
return this == &other;
}
};
} // namespace tree
} // namespace antlr4
Version data entries
3 entries across 3 versions & 1 rubygems