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authorSimon Peyton Jones <simonpj@microsoft.com>2013-05-30 22:02:17 +0100
committerSimon Peyton Jones <simonpj@microsoft.com>2013-05-30 22:03:47 +0100
commit3d81b68d48e86f9dff032321aff20b76ad3ea081 (patch)
treed2782d570c69eae25febdb6654c8944b2435dcf3 /compiler/utils/IOEnv.hs
parent7849266ce2a9f45633d41532a07d870ea6a27fbb (diff)
downloadhaskell-3d81b68d48e86f9dff032321aff20b76ad3ea081.tar.gz
Define chkAppend, and use it
Somtimes we need (xs ++ ys) in situations where ys is almost always empty. Utils.chkAppend checks for that case first.
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