Re: [Haskell-cafe] Unicode strings and runCommand / runProcess

В сообщении от 24 апреля 2010 03:50:54 John Goerzen написал:

Ivan Lazar Miljenovic wrote:

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John Goerzen writes:

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ghci GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> :m System.Process Prelude System.Process> runCommand "echo привет" ?@825B

Are you arguing about IO-specific stuff like this, or for all non-ASCII Strings?

I'm not sure I understand the question. I consider the behavior in System.IO to be well-documented. The behavior in System.Process is not documented at all. As I said, I'm not certain what the proper answer is, but not documenting what happens probably isn't it.

Actually, the behavior of openFile when given a String with characters > 0xFF is also completely undocumented. I am not sure what it does with that. It should probably be the same as runCommand, whatever it is.

Under unices file names are just array of bytes. There is no notion of encoding at all. It's just matter of interpretation of that array. There is a problem with FilePath data type. It's String actually but it should be abstract data type. There is relevant bug[1] on GHC trac. P.S. openFile truncates Chars. [1] http://hackage.haskell.org/trac/ghc/ticket/3307