Main new feature:

• Java: An experimental ANTLR4 backend [#155]

Backend-independent features:

• GHC 8.4 compatibility [#227,#236]
• bnfc now puts current timestamp on all created files, even unchanged ones [#219]
• bnfc is now more accepting about border-line terminals [#149]
• Improved error messages [#144] in particular on undefined categories [#151]

C and C++ backends:

• C: Emit correct function prototypes [#185]
• C++: Fix buffer overrun in pretty printer [#242]
• C++: Fix regression introduced in 2.8 in Skeleton.H [#164]
• C++: Replace %name-prefix with %define api.prefix in bison files [#181]
• C++: Fix a bug that appeared if you had a category named "List"
• C, C++: Add usage output to the test program [#141]
• C, C++: Fix a bug in the parser file when using -p [#172]
• C, C++, OCaml, Java: Accept ' or " as comment delimiters [#146]

Haskell backend:

• Generated code mostly hlint-warning free
• Small fixes [#166,#170,#222]

Other backends:

• Java: Add support for passing line numbers to parser [#217,#224,#226]
• OCaml: Reserved symbols now have a higher precedence than predefined tokens as in Haskell

Further:

• Some updates of the documentation [#211,#223]
• And various small fixes [#139,#159,#195,#201,#215]

Thanks to the many contributers to this version!