Lex/YACC

YACC is a Look-Ahead LR parser generator that takes Backus–Naur Form text files and generates LALR parsers from it. Primarily used as tool for generating front end parsers for compilers or formal validation for file formats in export filters and so on, so forth.

Lex/YACC compatible tools that run under OS/2

• Turbo Pascal Lex/YACC - Open source tool that uses L/Y syntax but outputs Turbo Pascal compatible code.

OS/2 text & programmers editors with Lex file and YACC BNF file support

• jEdit - Java based - Lex and YACC syntax highlighting built in - Current.
• NEdit - XFree86 - Autoindent, autocomplete and syntax highlighting for YACC BNF files - Open source - Discontinued.