elpa-bison-mode 0.3-2 (amd64 binary) in ubuntu oracular

 This package provides a GNU Emacs major mode for editing lex, yacc files, as
 well as their extension formats like flex, bison, and jison. It provides
 flex-mode, bison-mode, and jison-mode to add syntax highlighting and electric
 indentation when editing the corresponding types of files.