Can some one recommend a simple working example(code) of using recursive descent parser on haskell? All the information I found are too difficult to understand. Thx!
There's a chapter in, "Real World Haskell" devoted to Parsec, the recursive descent parser combinator library that comes with the Haskell Platform. There's also a bunch of Parsec links on the Haskell Wiki. Ultimately, once you get comfortable with the examples, you'll need the reference guide.