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Simon Peyton Jones authored
This patch implements generalised list comprehensions, as described in the paper "Comprehensive comprehensions" (Peyton Jones & Wadler, Haskell Workshop 2007). If you don't use the new comprehensions, nothing should change. The syntax is not exactly as in the paper; see the user manual entry for details. You need an accompanying patch to the base library for this stuff to work. The patch is the work of Max Bolingbroke [batterseapower@hotmail.com], with some advice from Simon PJ. The related GHC Wiki page is http://hackage.haskell.org/trac/ghc/wiki/SQLLikeComprehensions
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