wisp

wisp is a tiny interpreted lisp written is haskell & easily embedded into larger haskell programs, e.g., as a scripting language. it includes a superset of the following features:

• full lexical closures
• tail-call optimization
• macros
• first-class continuations
• pattern matching (on lists)
• automatic currying

the wisp interpreter

wisp lives in the ST (optionally IO) monad. separate interpreters with completely segregated environments can be run concurrently. wisp has a few IO facilities, but they're completely sandboxed and can't accidentally affect the host program or environment.