April 2007 - Haskell-Cafe

Fwd: [Haskell-cafe] Yi pre-release
by Dominic Steinitz 09 Apr '07

09 Apr '07

> dom@heisenberg:~/yi/yi> make > ghc --make Setup.*hs -o setup > [1 of 1] Compiling Main ( Setup.hs, Setup.o ) > Linking setup ... > ./setup configure --user --with-haddock=/home/dom/usr//bin/haddock > --prefix=/home/dom/usr/ --datadir=--prefix=/home/dom/usr/ > --disable-haddock-use-packages > --haddock-args="--read-interface=http://haskell.org/ghc/docs/latest/html/li >braries/base,/home/jp/haskell/ghc/libraries/base/base.haddock > --read-interface=http://haskell.org/ghc/docs/latest/html/libraries/QuickChe >ck,/home/jp/haskell/ghc/libraries/QuickCheck/QuickCheck.haddock > --source-module=%{MODULE}.hs.html --source-entity=%{FILE///.}.html#%{NAME} > --comments-base=http://haskell.org/haskellwiki/Talk:yi/Library > --comments-module=http://haskell.org/haskellwiki/Talk:yi/Library/%{MODULE/. >//}" configure: searching for ghc in path. > configure: Using alex: /usr/local/bin/alex > /usr/lib/gcc/i586-suse-linux/4.1.2/../../../../i586-suse-linux/bin/ld: > cannot find -lreadline collect2: ld returned 1 exit status > make: *** [build] Error 1 So make finds alex but make emacs doesn't. > dom@heisenberg:~/yi/yi> make emacs > make -C packages/yi-vty install > make[1]: Entering directory `/home/dom/yi/yi/packages/yi-vty' > ./setup build --with-ghc=/usr/bin/ghc > Preprocessing library yi-vty-0.2... > setup: ../../Yi/Syntax/Haskell.x: no alex preprocessor available > make[1]: *** [build] Error 1 > make[1]: Leaving directory `/home/dom/yi/yi/packages/yi-vty' > make: *** [yi-vty] Error 2 Dominic.

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Fwd: [Haskell-cafe] Yi pre-release
by Dominic Steinitz 09 Apr '07

09 Apr '07

---------- Forwarded Message ---------- > setup: Unrecognised flags: --disable-haddock-use-packages > make[1]: *** [.setup-config] Error 1 > make[1]: Leaving directory `/home/dom/yi/yi/packages/yi-vty' ------------------------------------------------------- > dom@heisenberg:~/yi/yi> make emacs > make -C packages/yi-vty install > make[1]: Entering directory `/home/dom/yi/yi/packages/yi-vty' > ./setup build --with-ghc=/usr/bin/ghc > Preprocessing library yi-vty-0.2... > setup: ../../Yi/Syntax/Haskell.x: no alex preprocessor available > make[1]: *** [build] Error 1 > make[1]: Leaving directory `/home/dom/yi/yi/packages/yi-vty' > make: *** [yi-vty] Error 2 JP, I assume this is the sort of feedback you want? Dominic.

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Stubborn memory leak
by Oren Ben-Kiki 09 Apr '07

09 Apr '07

I've minimized my problem to a short test program I pasted at http://hpaste.org/1314 The problem seems to be in forcing strict evaluation at just the right place, but all my attempts in doing so have causes the program to stop streaming and start consuming memory again - this time in un-emitted tokens. Any help would be appreciated, Oren.

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Yi pre-release
by Dominic Steinitz 08 Apr '07

08 Apr '07

> setup: Unrecognised flags: --disable-haddock-use-packages > make[1]: *** [.setup-config] Error 1 > make[1]: Leaving directory `/home/dom/yi/yi/packages/yi-vty'

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Yi pre-release
by Jean-Philippe Bernardy 08 Apr '07

08 Apr '07

Hello folks, More that two years after the 0.1.0 release, I would like to attract people's attention to recent developments on the Yi editor. This preview release is an attempt to gather more users, testers and hopefully contributors for an upcoming "stable" release. Yi is a text editor written and extensible in Haskell. The goal of Yi is to provide a flexible, powerful and correct editor core dynamically scriptable in Haskell. * Yi is an haskell interpreter. Much like emacs is a Lisp interpreter, Yi is an haskell interpreter. This is implemented by binding to the GHC API. This permits hacking of the editor behaviour at runtime. Tools and goodies written in haskell are also readily available from the editor. * Frontends. Yi can use either gtk2hs or vty as frontends, so users can choose their favourite interface. * "Emulation modes". The primary emulation modes for Yi are vi and emacs. Keybindings for vim, mg and nano and other are also provided. Other editor interfaces can be written by the user to extend Yi. More information is available on: http://haskell.org/haskellwiki/Yi Darcs repo: http://www.cse.unsw.edu.au/~dons/yi/ Yi homepage: http://www.cse.unsw.edu.au/~dons/yi.html Patches, comments, criticism welcome... as always! -- Jean-Philippe Bernardy

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Function call by string
by Philipp Volgger 08 Apr '07

08 Apr '07

Hello everybody! Can me somebody say how I can call a function by string? Thus I want to have a function that has as argument a string (name of a function to call) and then tries to call that function, a kind of: functionCall :: String -> [String] -> RetVal functionCall functionName arguments = ... Thanks

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ANN: utility for deriving rules from a nominal table
by Hans van Thiel 08 Apr '07

08 Apr '07

Hello All, I'd like to announce the availability of Emping, a utility that reads a table in a csv format that can be generated from Open Office Calc, derives all shortest rules for a selected attribute, and writes them to a .csv file that can be read by OO Calc. See http://j-van-thiel.speedlinq.nl/emp/empug.html for more and, if you're interested, a download. The package is built by Cabal. However, I couldn't install it myself from there with Cabal. Configuration seemed to go OK, but build generated a message that ghc found no source files. I couldn't get it right, but I'm leaving it at that, because (1) I'm assuming the package itself is OK and (2) it's a standalone utility so maybe Cabal is overkill anyway (though it's nice how Cabal forces a structure). Just compiling the source modules is, probably, the preferred option here. Thanks, Hans van Thiel

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ANN: XMPP 0.0.1
by Magnus Henoch 08 Apr '07

08 Apr '07

I'm hacking a library for writing XMPP clients, and just decided that my work is good enough to call it version 0.0.1. Find source and documentation here: http://www.dtek.chalmers.se/~henoch/text/hsxmpp.html It contains a werewolf bot as an example. I wanted the bot to speak several languages, but I couldn't find any library that would make that easier, so I wrote one myself, in Translate.hs. Is there any other way to do that? What do other projects use? The library contains an event loop: it waits for data from the network, treats it as events and handles them. (the loop is in runXMPP in XMPPMonad.hs, and the actual waiting is in getString in TCPConnection.hs) I can imagine that it might be useful to integrate this in another event loop, e.g. to create a chat client with a GUI. Do you have any thoughts on whether and how to do that? Magnus

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Yi Source
by Dave Feustel 08 Apr '07

08 Apr '07

Is the full source of Yi suitable for building on non-linux platforms (ie OpenBSD) (going to be) available? Thanks, Dave Feustel http://RepublicBroadcasting.org - Because You CAN Handle The Truth!

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Re: `Expect'-like lazy reading/Parsec matching on TCP sockets
by Scott Bell 07 Apr '07

07 Apr '07

> you should write compiler version and OS for such problems. Of course, this was 6.7-20070404 on Linux x86. I haven't had a change to test it on my 6.6 build. > I/O in Windows threaded RTS was fixed after initial 6.6 release and > afaik hWaitForInput should work better now. alternatively, you can try > with hand-made timeout solution I'm not sure what the status is on hWaitForInput with the snapshot that I am using -- any other ideas what I could try to further isolate the problem? - Scott Bell

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