[Haskell-cafe] Announcing OneTuple-0.1.0

John Dorsey haskell at colquitt.org
Thu Oct 2 02:56:08 EDT 2008

Fellow Haskellers,

Much attention has been paid over the years to the regrettable
omission of singleton tuples from Haskell.

I am pleased to announce OneTuple, a humble implementation of the
singleton tuple for Haskell.  Now you can:

*  Wrap a single value of any type in a OneTuple !

*  Pattern match to retrieve your value !

*  Solve any of the software problems that cannot be solved without
   the singleton tuple !

*  Enjoy instances for all the classes normal tuples have, plus more !

*  Proclaim feature parity with Python !

Note:  the singleton tuple does not support tuple syntax.

Contributions are welcome.  The project could use a tutorial, and a
decent test suite.  Strict singleton tuples are planned for the next


John Dorsey

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