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Shen is a portable functional programming language that offers

  • pattern matching,
  • lambda calculus consistency,
  • macros,
  • optional lazy evaluation,
  • static type checking,
  • an integrated fully functional Prolog,
  • and an inbuilt compiler-compiler.

Shen has one of the most powerful type systems within functional programming. Shen runs under a reduced instruction Lisp and is designed for portability. The word ‘Shen’ is Chinese for 'spirit' and our motto reflects our desire to liberate our work to live under many platforms. Shen is under BSD and currently runs under CLisp and SBCL, Clojure, Scheme, Ruby, Python, the JVM and Javascript.

The second edition to The Book of Shen is now available here.

Shen has transitioned to BSD at 8:47 GMT February 3rd 2015


Logic, Proof and Computation - Second Edition Cover Image Just out!: Logic, Proof and Computation is a new text written to introduce programmers to combined topics in computational, mathematical and philosophical logic. The book is computer supported by programs in Shen.

Beginning with a review of formal languages and their syntax and semantics, Logic, Proof and Computation conducts a computer assisted course in formal reasoning and the relevance of logic to mathematical proof, information processing and philosophy.

To read more or to order click here.