Antlr4Code is a free VS 2013/2015 extension which I quickly wrote so we have a minimum of editing support for ANTLR4 grammars inside Visual Studio.

Right now it is pretty basic stuff, nothing too fancy, but the essential stuff is there:

  • 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

Download it at VS Gallery