Lex

Lex is a tool that looks for logical units (lexemes) in sequences of characters. This is typically the first tasks a compiler does after it has when he is has to do is read the source program and group its characters into lexemes.

OS/2 Tools

• MKS lex & yacc
• flex
• Thinkage YAY [1]
• Turbo Pascal Lex/YACC - Open source tool that uses L/Y syntax but outputs Turbo Pascal compatible code.

Editor support

• jEdit - Java based - Lex syntax highlighting built in, YACC available as a separate download - Current
• NEdit - XFree86 - Auto-indent, autocomplete and syntax highlighting for YACC BNF files - Open source - Discontinued