[Haskell-beginners] Re: How to import the Data.Char library in Hugs?

My apologies; another respondent in this forum responded in a private e-mail message that I had misrecognized your ":l" (a colon followed by a lowercase 'L') for a vertical bar; I was using a variable-width font; perhaps I should have double-checked using a fixed-width font. I stand (er, sit, rather) corrected, as follows: --8<---------------cut here---------------start------------->8--- Hugs>:l Data.Char Data.Char>:? --8<---------------cut here---------------end--------------->8--- Incidentally, if WinHugs cannot have multiple loaded modules unless they are put in a file and loaded therein, then what is the difference between the ":l" (a colon followed by a lowercase 'L') and ":a" (a colon followed by a lowercase 'A') commands? -- Benjamin L. Russell On Fri, 18 Sep 2009 11:39:50 +0900, Benjamin L.Russell wrote:

On Thu, 17 Sep 2009 15:02:21 +0200, Adrian Neumann wrote:

...

You do

...

:l Data.Char

That command didn't work; see the following results:

--8<---------------cut here---------------start------------->8--- Hugs>:| Data.Char Command not recognised. Type :? for help Hugs> --8<---------------cut here---------------end--------------->8---

-- Benjamin L. Russell

...

As far as I know you can't have multiple loaded modules unless you put them in a file and load that.

Regards,

Adrian

Benjamin L.Russell schrieb:

...

My apologies if this is an extremely elementary question, but I am having difficulties in importing the Data.Char library in Hugs.

In GHCi, the command "import Data.Char" works correctly, as follows:

--8<---------------cut here---------------start------------->8--- GHCi, version 6.10.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, for Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help.

Prelude> import Data.Char Prelude Data.Char> --8<---------------cut here---------------end--------------->8---

However, in Hugs, the same command fails with an error, as follows:

--8<---------------cut here---------------start------------->8--- __ __ __ __ ____ ___ _________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-2005 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Bugs: http://hackage.haskell.org/trac/hugs || || Version: 20051031 _________________________________________

Haskell 98 mode: Restart with command line option -98 to enable extensions

Type :? for help Hugs> import Data.Char ERROR - Syntax error in expression (unexpected keyword "import") Hugs> --8<---------------cut here---------------end--------------->8---

Does anybody know how to import the Data.Char library in Hugs?

-- Benjamin L. Russell

-- Benjamin L. Russell / DekuDekuplex at Yahoo dot com http://dekudekuplex.wordpress.com/ Translator/Interpreter / Mobile: +011 81 80-3603-6725 "Furuike ya, kawazu tobikomu mizu no oto." -- Matsuo Basho^