AntlrListenerVisitorComparison

AntlrListenerVisitorComparison copied to clipboard

##Description

Antlr4 provides two ways of traversing syntax tree:

• Listener (default)
• Visitor

This project implements simple parser (takes input as a String (code) and returns Class object). It uses both implementations (listener and visitor) where:

• The language rules are the same (SomeLanguage.g4) for both implementations.
• The parser output is the same for both implementations (Test.java contains test covering this case)

You can compare two implementations to see the differences:

• The Visitor implementation : VisitorOrientedParser.java.
• The Listener implementation : ListenerOrientedParser.java.

The project is also described in this blog post - Antlr 4 - Listener vs Visitor

Building

mvn package

Run sample parsing

mvn package java -jar parser/target/parser-1.0-SNAPSHOT-jar-with-dependencies.jar