On Wed, Nov 15, 2006 at 03:54:31PM +1100, Donald Bruce Stewart wrote:
> To: glasgow-haskell-users@haskell.org
> Cc: haskell-cafe@haskell.org
> From: Donald Bruce Stewart <[EMAIL PROTECTED]>
> Date: Wed, 15 Nov 2006 15:54:31 +1100
> Subject: [Haskell-cafe] Debugging partial functions by the rules
>
Ok, so I took the rule rewriting idea and added a preprocessor instead, that
inserts 'assert's for you, currently just for head,tail and fromJust.
This program, for example:
module Main where
import qualified Data.Map as M
import Data.Maybe
main = do print f
f = let m = M.f
On 11/14/06, Donald Bruce Stewart <[EMAIL PROTECTED]> wrote:
So, further work:
* have 'assert' respected when -O is on
* think up a technique for splicing in 'assert' via rewrite rules (or TH
...) such that the src locations are expanded after the rewrite, and
correctly reflect the
So all this talk of locating head [] and fromJust failures got me
thinking:
Couldn't we just use rewrite rules to rewrite *transparently*
all uses of fromJust to safeFromJust, tagging the call site
with a location?
To work this requires a few things to go right:
* a rewrite rule
On 14/11/06, chris moline <[EMAIL PROTECTED]> wrote:
--- brad clawsie <[EMAIL PROTECTED]> wrote:
> it would be great if some of the more informed
> posters here took a stab
> at filling in
>
>
http://pleac.sourceforge.net/pleac_haskell/index.html
>
> a neat site for cookbook-style problem solving
On 14/11/06, Cale Gibbard <[EMAIL PROTECTED]> wrote:
On 14/11/06, Valentin Gjorgjioski <[EMAIL PROTECTED]> wrote:
> Just one more thing
>
> If I write
>
> ex9 :: [Float]
> ex9 = (observe "after reverse" ) reverse [10.0,7.0,3.0,0.0,4.0]
>
> it doesn't work. If I delete ex9 :: [Float] then it wor
On 14/11/06, Valentin Gjorgjioski <[EMAIL PROTECTED]> wrote:
Just one more thing
If I write
ex9 :: [Float]
ex9 = (observe "after reverse" ) reverse [10.0,7.0,3.0,0.0,4.0]
it doesn't work. If I delete ex9 :: [Float] then it works fine. any
suggestions?
This doesn't happen for me. The only t
On Wed, 2006-11-15 at 01:29 +, Neil Mitchell wrote:
> > The funny thing is that we can actually use Haskell threads with Gtk2Hs
> > perfectly well with the single threaded rts (we currently use a polling
> > scheme to to cooperative scheduling between gtk+ and ghc rts but there
> > are some no
Hi
Plan 1: prevent gtk2hs initialising when using the threaded RTS.
This is what the dev version does at the moment to prevent people
shooting themselves in the foot.
The funny thing is that we can actually use Haskell threads with Gtk2Hs
perfectly well with the single threaded rts (we current
On 14.11.2006 23:17 Cale Gibbard wrote:
On 13/11/06, Valentin Gjorgjioski <[EMAIL PROTECTED]> wrote:
Following example
import Hugs.Observe
ex8 :: [Float]
ex8 = (observe "after reverse" ) reverse [10.0,7.0,3.0,0.0,4.0]
gives me
>ex8
[4.0,0.0,3.0,7.0,10.0]
>>> Observations <<
aft
On Tue, 2006-11-14 at 10:40 +, Simon Peyton-Jones wrote:
> I wonder whether it'd be possible to make the gtk2hs stuff emit
> warnings if you make calls from two different threads? Then an
> application would complain constructively rather than "becoming
> unstable".
I have three plans:
Plan
--- brad clawsie <[EMAIL PROTECTED]> wrote:
> it would be great if some of the more informed
> posters here took a stab
> at filling in
>
>
http://pleac.sourceforge.net/pleac_haskell/index.html
>
> a neat site for cookbook-style problem solving
What I've always found funny about pleac is that n
On 13/11/06, Valentin Gjorgjioski <[EMAIL PROTECTED]> wrote:
I'm pretty new in Haskell, few days since I started learning it. I want
to debu my programs. I'm currently using WinHugs, and I prefer debugger
for this.
I tried googling and I found Hugs.Observer.
I like it how it works, but still I
Spencer Janssen <[EMAIL PROTECTED]> writes:
> Please do not use the PLEAC Haskell cookbook for learning Haskell. The
> author redefined many of the standard operators to produce code that isn't
> standard Haskell.
>
> Here are some choice snippets from the first chapter:
>
> Now, we all know th
One of Alan Perlis's "Epigrams in Programming" is "A language that
doesn't affect the way you think about programming, is not worth
knowing". I recently had an experience that demonstrated this principle.
I had to write some code that took a polygon (encoded in WKT, a standard
format for geograph
Hello Simon,
Tuesday, November 14, 2006, 4:31:27 PM, you wrote:
> Sure, since gzip is the metric, then we can optimise for that. For example,
> instead of writing a higher-order function, just copy it out N times
> instantiating the higher-order argument differently each time. There should
>
Simon Peyton-Jones <[EMAIL PROTECTED]> wrote in article <[EMAIL PROTECTED]> in
gmane.comp.lang.haskell.cafe:
> I wonder whether it'd be possible to make the gtk2hs stuff emit
> warnings if you make calls from two different threads? Then an
> application would complain constructively rather than "
Sebastian Sylvan wrote:
On 11/10/06, Henk-Jan van Tuyl <[EMAIL PROTECTED]> wrote:
On Fri, 10 Nov 2006 01:44:15 +0100, Donald Bruce Stewart
<[EMAIL PROTECTED]> wrote:
> So back in January we had lots of fun tuning up Haskell code for the
> Great Language Shootout[1]. We did quite well at the t
Hello Dmitry,
Tuesday, November 14, 2006, 1:26:36 PM, you wrote:
>> it is what i say about. threaded RTS + multipls threads that does
>> computations + one thread that interfaces with Gtk2Hs. afaiu, the only
>> problem is that i need to manage both Gtk events and periodically
>> check queue of co
On 11/14/06, Dmitry V'yal <[EMAIL PROTECTED]> wrote:
Bulat Ziganshin wrote:
> it is what i say about. threaded RTS + multipls threads that does
> computations + one thread that interfaces with Gtk2Hs. afaiu, the only
> problem is that i need to manage both Gtk events and periodically
> check que
Björn Bringert wrote:
Cale Gibbard wrote:
On 22/10/06, Chad Scherrer <[EMAIL PROTECTED]> wrote:
Hi,
I had posted this question a while back, but I think it was in the
middle of another discussion, and I never did get a reply. Do we
really need both Control.Parallel.Strategies.rnf and deepSeq
Duncan Coutts wrote:
> The problem at the moment with GUIs and GHC's threaded RTS is that there
> is now way to specify that all the Haskell threads that want to do GUI
> stuff must run on a single OS thread. It's not impossible to solve but
> it requires either more support from the RTS or it nee
Bulat Ziganshin wrote:
> it is what i say about. threaded RTS + multipls threads that does
> computations + one thread that interfaces with Gtk2Hs. afaiu, the only
> problem is that i need to manage both Gtk events and periodically
> check queue of commands from other threads, but using timer + Ch
Iván Pérez Domínguez wrote:
> I'm using Gentoo Linux. We obviously don't use prebuilt packaged
> versions, but installing it is just doing "emerge wxhaskell" and
> 'playing the... waiting game'. Gtk2hs support under Gentoo is mostly
> missing (the package is included, but doesn't work at all).
Hm
I wonder whether it'd be possible to make the gtk2hs stuff emit warnings if you
make calls from two different threads? Then an application would complain
constructively rather than "becoming unstable".
Simon
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