Antlr4Code brings a full-featured editor for ANTLR4 grammars (.g4 files).

• syntax highlighting (looks good among all VS themes)
• semantic analysis
• Go To Definition support for lexer and parser rules
• shows errors squiggles for undefined lexer or parser rules
• VS 2013/2015/2017 support

Check more of our handy tools at http://misoftware.com.br/