Sorry this was my complete confustion (List.\\) is not same as List.(\\). Ahn, Ki Yung 쓴 글: > Running ghci without any option or scripts to load, I've experienced > some inconsistencies prelude List.\\ and List.(\\) . The former is in > scope, but the latter is not. This seem strange. My expectation is > that neither of them should be in scope unless we load the List module > with with the :m command. > > I'm using Debian distribution of GHC 6.10.4, and here is an example run > of ghci to show this issue. > > kya...@kyagrd:~/tmp$ ghci > GHCi, version 6.10.4: http://www.haskell.org/ghc/ :? for help > Loading package ghc-prim ... linking ... done. > Loading package integer ... linking ... done. > Loading package base ... linking ... done. > Prelude> [1,2,3,4] List.\\ [1,3] > [2,4] > Prelude> List.(\\) [1,2,3,4] [1,3] > > <interactive>:1:0: Not in scope: data constructor `List' > > <interactive>:1:5: Not in scope: `\\' > Prelude> :q > Leaving GHCi. > kya...@kyagrd:~/tmp$ ghc --version > The Glorious Glasgow Haskell Compilation System, version 6.10.4 > kya...@kyagrd:~/tmp$ uname -a > Linux kyagrd 2.6.30-2-686 #1 SMP Sat Sep 26 01:16:22 UTC 2009 i686 GNU/Linux
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