Uniqueness Typing Simplified

Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5083)


We present a uniqueness type system that is simpler than both Clean’s uniqueness system and a system we proposed previously. The new type system is straightforward to implement and add to existing compilers, and can easily be extended with advanced features such as higher rank types and impredicativity. We describe our implementation in Morrow, an experimental functional language with both these features. Finally, we prove soundness of the core type system with respect to the call-by-need lambda calculus.


Type System Uniqueness Typing Linear Logic Boolean Expression Typing Rule 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  1. 1.Trinity College DublinIreland
  2. 2.Radboud Universiteit NijmegenNetherlands

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