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Simon Peyton Jones authored
This work was all done by Achim Krause <achim.t.krause@gmail.com> George Giorgidze <giorgidze@gmail.com> Weijers Jeroen <jeroen.weijers@uni-tuebingen.de> It allows list syntax, such as [a,b], [a..b] and so on, to be overloaded so that it works for a variety of types. The design is described here: http://hackage.haskell.org/trac/ghc/wiki/OverloadedLists Eg. you can use it for maps, so that [(1,"foo"), (4,"bar")] :: Map Int String The main changes * The ExplicitList constructor of HsExpr gets witness field * Ditto ArithSeq constructor * Ditto the ListPat constructor of HsPat Everything else flows from this.
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