antlr-file-formats-alist

antlr-file-formats-alist is a variable defined in `antlr-mode.el'.
Its value is

((java-mode
  ("%sTokenTypes.java")
  ("%s.java"))
 (c++-mode
  ("%sTokenTypes.hpp")
  ("%s.cpp" "%s.hpp")))

Documentation:
Language dependent formats which specify generated files.
Each element in this list looks looks like
(MAJOR-MODE (VOCAB-FILE-FORMAT...) (CLASS-FILE-FORMAT...)).

The element whose MAJOR-MODE is equal to `antlr-language' is used to
specify the generated files which are language dependent. See variable
`antlr-special-file-formats' for language independent files.

VOCAB-FILE-FORMAT is a format string, it specifies with substitution
VOCAB/%s the generated file for each export vocabulary VOCAB.
CLASS-FILE-FORMAT is a format string, it specifies with substitution
CLASS/%s the generated file for each grammar class CLASS.