Antlr - Idea Plugin

The Idea plugin is a plugin for Idea that install the Antlr tool.

Create a grammar file with the extension g4 and Idea should propose you to install the Antlr plugin

Right click on your g4 file, you should see the Antlr option.

Antlr Recognizer run antlr.

Default run with the default configuration gives:

antlr4 ^
    -o %ProjectRoot%\gen ^ 
    -listener ^
    -visitor ^
    -lib %ProjectRoot%/src/main/antlr4/com/group/package/lexer ^ # output dir
    %ProjectRoot%src/main/antlr4/grammar.g4

where:

• o is the Output dir where all output is generated
• -listener will generate the parse tree listener
• -visitor will generate the parse tree visitor
• -lib specify the location of grammars, tokens files

The Configure Antlr are the options of antlr

Test a rule

start typing the text to see the tree in the Antlr panel