ada_antlr_grammar ANTLR grammars for Ada Status antlr2 contains a functioning Ada2005 grammar with a few elements of Ada2012 antlr3 is a project to port the antlr2 grammar to ANTLR version 3 (not yet usable). antlr4 is a direct translation of the Ada202x draft grammar to ANTLR-4. Providing C++ target support is being looked at.