There's a Lua library called LPeg [1], which introduces a DSL of a kind to Lua that lets you write PEGs with minimal effort. The vis editor [2] uses LPeg files

There's a Lua library called LPeg [1], which introduces a DSL of a kind to Lua that lets you write PEGs with minimal effort. The vis editor [2] uses LPeg files as lexers for syntax highlighting, and they look very clean IMO; for example, this is the C lexer: https://github.com/martanne/vis/blob/master/lua/lexers/ansi_c.lua https://github.com/martanne/vis/blob/master/lua/lexers/ansi_... [1]: http://www.inf.puc-rio.br/~roberto/lpeg/ http://www.inf.puc-rio.br/~roberto/lpeg/ [2]: https://github.com/martanne/vis https://github.com/martanne/vis