Re: Limiting resources on a per-function basis?
Jeff Newbern [EMAIL PROTECTED] writes: Thanks for your input. I am mainly interested in this functionality to enhance my unit tests. I want to be able to run test cases with limits on time, heap, stack, etc. and fail the test if it exceeds the limits. Well, if you can isolate the tests well enough (i.e. not run too many other parts of your program), you could possibly get by with GHC's options for limiting resources (for the whole program)? In particular the +RTS -K and -M options would be useful, see http://www.haskell.org/ghc/docs/6.2/html/users_guide/runtime-control.html#RTS-OPTIONS-GC for details. -kzm -- If I haven't seen further, it is by standing in the footprints of giants ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: Perspectives on learning and using Haskell
[EMAIL PROTECTED] writes: There is only one problem I've found with test-driven development in Haskell. In C++, it's possible to break the module abstraction (yes, I know, C++ doesn't have modules; it has classes, which are really instantiable modules) by using friend. In Haskell, I find myself occasionally having to expose parts of a module which I would prefer not to, in order for the unit tests suite to do their job effectively. My one problem with test-driven Haskell is, how to do it with QuickCheck tests? It's easy enough with HUnit, but I'd like to try it with QuickCheck, any suggestions? I wonder if there might be a way to fix this, say, by allowing modules to selectively expose parts of their interface depending on who wants to use it. What about GHC's new -main-is flag to specify a test main function? Then you may be able to write test code without exporting internal functions. As for tighter integration of tests with code, I wrote an example of one-button unit-testing in emacs on the HaskellMode page on the HaWiki, and the Programatica editor, as demonstrated at Haskell Workshop 2003 has the ability to embed 'certificates' that can be proofs, unit tests, etc. Check out the Evidence Management section here: http://www.cse.ogi.edu/~hallgren/Programatica/HW2003/demoabstract.html There's also the darcs_test parts of darcs, you can assign a script to run tests after a variety of darcs commands. None of these run the tests at compile time, but it's better than manually running the tests. -- Shae Matijs Erisson - 2 days older than RFC0226 #haskell on irc.freenode.net - We Put the Funk in Funktion 10 PRINT HELLO 20 GOTO 10 ; putStr $ fix (HELLO\n++) ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
pet project - 7 Millennium Prize problemss
Folks, I think Haskell can be used to solve several, if not all, of the seven problems. Now I have to decide which problem to tackle first. Chris = Christopher Milton [EMAIL PROTECTED] ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: Perspectives on learning and using Haskell
Duncan Coutts wrote: On Sun, 2004-01-04 at 10:20, Graham Klyne wrote: [...] I would expect that when using GHC to compile a stand-alone Haskell program, any expressions that are not referenced are not included in the final object program, so leaving these test cases uncommented would be harmless: is this so? If your test functions are not exported, I would expect that this is the case. [...] Yes, unused functions which are not exported are nuked during compilation, even without using the -O flag. But don't guess, just ask GHC itself via its -ddump-occur-anal flag. (DISCLAIMER: I'm not responsible for the, well, slightly obscure name of this flag! :-) There are a lot more flags of this kind, see: http://haskell.org/ghc/docs/latest/html/users_guide/options-debugging.html#DUMPING-OUTPUT When you are *really* curious, use -v5. Simon^2: The -ddump-all and -ddump-most flags mentioned on the page above are not working anymore, -v5 / -v4 seem to do their job now. Should the documentation be fixed or GHC? Cheers, S. ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: pet project - 7 Millennium Prize problemss
Christopher Milton [EMAIL PROTECTED] writes: I think Haskell can be used to solve several, if not all, of the seven problems. What's this? Is there an URL with more information? -kzm -- If I haven't seen further, it is by standing in the footprints of giants ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: pet project - 7 Millennium Prize problemss
--- Ketil Malde [EMAIL PROTECTED] wrote: Christopher Milton [EMAIL PROTECTED] writes: I think Haskell can be used to solve several, if not all, of the seven problems. What's this? Is there an URL with more information? Sorry, I meant to include the URL, but I got distracted. http://www.claymath.org/Millennium_Prize_Problems/ = Christopher Milton [EMAIL PROTECTED] ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
HSQL Linking Problem with ghc6
Hello Haskellians, I have been looking for a way to get ghc-compiled haskell programs to talk to a PostgreSQL database, and HSQL seems to be exactly what I need... And what's more, it appears to have downloaded and installed with minimal hassle... Alas (and I am sure this is a problem with my own lack of knowledge or misconfiguration of my system) I can't get ghc to link my program to the HSQL libHSSql.a library. At least I think that is the problem. On my debian-stable system, with some packages and libraries upgraded to -testing so I could install ghc6, I downloaded HSQL 1.0 from sourceforge and then ./configured with --enable-postgress and told it to make and then make -install the HSQL package. When I put an import HSQL statement in my program ghc compiles it without errors but the Linking phase reports the following (my program name is EnvPassed:) Linking ... EnvPassed.o: In function `__stginit_main_': EnvPassed.o(.text+0x25): undefined reference to `__stginit_HSQL_' Collect2: ld returned 1 exit status I get the same error when I do a standard compile and when I specify the library to link to as follows: ghc --make EnvPassed.hs -o EnvPassed -lHSsql -L/software/HSQL/ (I had expanded and built HSQL in the /software directory.) Am I doing something stupid? What should I check for this kind of error? Any help would be appreciated. Chuck ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: HSQL Linking Problem with ghc6
Nevermind, I found it. http://htoolkit.sourceforge.net/ --- Christopher Milton [EMAIL PROTECTED] wrote: I keep only finding a Java SQL interface on SourceForge when I look for HSQL. What is the URL? --- Charles Perkins [EMAIL PROTECTED] wrote: Hello Haskellians, I have been looking for a way to get ghc-compiled haskell programs to talk to a PostgreSQL database, and HSQL seems to be exactly what I need... And what's more, it appears to have downloaded and installed with minimal hassle... Alas (and I am sure this is a problem with my own lack of knowledge or misconfiguration of my system) I can't get ghc to link my program to the HSQL libHSSql.a library. At least I think that is the problem. On my debian-stable system, with some packages and libraries upgraded to -testing so I could install ghc6, I downloaded HSQL 1.0 from sourceforge and then ./configured with --enable-postgress and told it to make and then make -install the HSQL package. When I put an import HSQL statement in my program ghc compiles it without errors but the Linking phase reports the following (my program name is EnvPassed:) Linking ... EnvPassed.o: In function `__stginit_main_': EnvPassed.o(.text+0x25): undefined reference to `__stginit_HSQL_' Collect2: ld returned 1 exit status I get the same error when I do a standard compile and when I specify the library to link to as follows: ghc --make EnvPassed.hs -o EnvPassed -lHSsql -L/software/HSQL/ (I had expanded and built HSQL in the /software directory.) Am I doing something stupid? What should I check for this kind of error? Any help would be appreciated. Chuck ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
