[Haskell] build an interpreter on top of GHCi?

Hi All, Does anybody has the experience to built an interpreter on top of GHCi? What I want is to defined a my own interpreter as a Haskell module and load it into GHCi. So this new interpreter will be running on top of GHCi which accepts syntax extension of Haskell. For example: Prelude> :l myInter Prelude> myInter> new language source Prelude> myInter> ... Prelude> myInter> exit Prelude> In another word, I want to have a read-eval-print-loop running on GHCi. Does anybody know how to do that? -W-M- @ @ | \_/