patch applied (cabal): Improve style and performance of PackageIndex.dependencyClosure

Tue May 6 16:44:47 PDT 2008 Duncan Coutts * Improve style and performance of PackageIndex.dependencyClosure Keep the completed set as another PackageIndex rather than a list. We want to return an index at the end anyway and in the mean time we want to do lots of lookups to see if we've visited previously. M ./Distribution/Simple/PackageIndex.hs -12 +10 View patch online: http://darcs.haskell.org/cabal/_darcs/patches/20080506234447-adfee-60242561c...