GUI tool for generating antrl parser files.
This tool is to execute the command like "java -jar antlr-4.8-complete.jar -Dlanguage=CSharp JavaParser.g4", which is described at antlr,
and it supports custom define the fore highlighted values by changing the config file for furture possible change.
You can find the generated files at grammars-v4 which also provides other necessary files to constitute a complete suit.
