24th International Workshop on
Functional and (Constraint) Logic Programming (WFLP 2016)
https://wflp2016.github.io/
September 13-14, part of the
Leipzig Week of Declarative Programming (L-DEC 2016)
Registration is now open, see:
http://nfa.imn.htwk-leipzig.de/LDEC2016/registration/
Note the
of Innsbruck, Austria
* Kazutaka Matsuda, Tohoku University, Japan
* Martin Sulzmann, Karlsruhe University of Applied Sciences, Germany
* Janis Voigtlaender (Chair), University of Bonn, Germany
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, Germany
* Janis Voigtlaender (Chair), University of Bonn, Germany
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* Francisco J. Lopez Fraguas, Universidad Complutense de Madrid, Spain
* Michael Hanus, University of Kiel, Germany
* Sebastiaan Joosten, University of Innsbruck, Austria
* Kazutaka Matsuda, Tohoku University, Japan
* Martin Sulzmann, Karlsruhe University of Applied Sciences, Germany
* Janis
of Innsbruck, Austria
* Kazutaka Matsuda, Tohoku University, Japan
* Martin Sulzmann, Karlsruhe University of Applied Sciences, Germany
* Janis Voigtlaender (Chair), University of Bonn, Germany
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Call for Participation
28th Workshop on (Constraint) Logic Programming (WLP 2014) co-located with
23rd International Workshop on Functional and (Constraint) Logic
Programming (WFLP 2014)
Lutherstadt Wittenberg, Germany, September 15 - 17
Early registration deadline: August 26
The
PEPM 2015 Paper Submission Deadline: September 12 (FIRM)
Note: deadline is significantly earlier than previous years.
Hope to see you in Mumbai, India!
-
C A L L F O R P A P E R S
We extended the deadline until 12th July.
=
CALL FOR PAPERS
Second Workshop on Haskell And Rewriting Techniques (HART 2014)
http://www.program-transformation.org/HART14/
To be held on September 5, co-located with ICFP
2nd CALL FOR PAPERS
Second Workshop on Haskell And Rewriting Techniques (HART 2014)
http://www.program-transformation.org/HART14/
To be held on September 5, co-located with ICFP, the Haskell Symposium,
etc., in Gothenburg.
Haskell is an advanced
CALL FOR PAPERS
Second Workshop on Haskell And Rewriting Techniques (HART 2014)
http://www.program-transformation.org/HART14/
To be held on September 5, co-located with ICFP, the Haskell Symposium,
etc., in Gothenburg.
Haskell is an advanced
CALL FOR PAPERS
First International Workshop on
Rewriting Techniques for Program Transformations and Evaluation
(WPTE'14)
affiliated with RTA/TLCA 2014
(a FLoC 2014 workshop, FLoC is part of the Vienna
Third International Workshop on Bidirectional Transformations (BX 2014)
Friday March 28th, 2014
Athens, Greece
co-located with EDBT/ICDT 2014
Web site:
http://bx-community.wikidot.com/bx2014:home
Submission site:
https://www.easychair.org/account/signin.cgi?conf=bx2014
Paper length: 3-8 pages,
University)
Eijiro Sumii (Tohoku University) [co-chair]
Tachio Terauchi(Nagoya University)
Joost Vennekens(KU Leuven)
Janis Voigtlaender (Universitaet Bonn)
Stephanie Weirich (University of Pennsylvania)
Local Chair
===
Yuki Chiba (JAIST)
Submission
==
Submissions
can increase our coverage of all that is going on in the community.
Feel free to circulate this announcement further in order to
reach people who might otherwise not see it. Enjoy!
Mihai Maruseac and Janis Voigtlaender
hcar at haskell.org
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to
update your webpages, make new releases, announce or even start new
projects, or to talk about developments you want every Haskeller to
know about!
Looking forward to your contributions,
Mihai Maruseac and Janis Voigtlaender (for this edition)
FAQ:
Q: What format should I write
to
update your webpages, make new releases, announce or even start new
projects, or to talk about developments you want every Haskeller to
know about!
Looking forward to your contributions,
Mihai Maruseac and Janis Voigtlaender (for this edition)
FAQ:
Q: What format should I write
Third International Workshop on Bidirectional Transformations (BX 2014)
===
Friday March 28th, 2014
Athens, Greece
co-located with EDBT/ICDT 2014
http://bx-community.wikidot.com/bx2014:home
Bidirectional transformations (bx)
Dear all,
The Haskell Communities and Activities Report has been produced twice a
year for more than ten years now:
http://www.haskell.org/haskellwiki/Haskell_Communities_and_Activities_Report
I have been responsible for producing it the last few years, which was
fun. I am now looking to pass
Dear all,
The Haskell Communities and Activities Report has been produced twice a
year for more than ten years now:
http://www.haskell.org/haskellwiki/Haskell_Communities_and_Activities_Report
I have been responsible for producing it the last few years, which was
fun. I am now looking to pass
===
CALL FOR PAPERS
ACM SIGPLAN 2010 Workshop on
Partial Evaluation and Program Manipulation (PEPM'10)
Madrid, January 18-19, 2010
(Affiliated with
===
CALL FOR PAPERS
ACM SIGPLAN 2010 Workshop on
Partial Evaluation and Program Manipulation (PEPM'10)
Madrid, January 18-19, 2010
(Affiliated with POPL'10)
deriver for Zippable instances, so you don't have to write the
above instance definition yourself.
The implementation is by Joachim Breitner.
Ciao,
Janis.
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decreased in some areas? I am pretty
sure that a week ago or so I could use Hayoo to find
sumP :: Num a = [:a:] - a
from GHC.PArr.
Now, that result does not turn up anymore.
Ciao,
Janis.
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mailto:vo...@tcs.inf.tu-dresden.de
decreased in some areas? I am pretty
sure that a week ago or so I could use Hayoo to find
sumP :: Num a = [:a:] - a
from GHC.PArr.
Now, that result does not turn up anymore.
Ciao,
Janis.
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mailto:vo...@tcs.inf.tu-dresden.de
Bulat Ziganshin wrote:
Hello Cristiano,
Thursday, July 9, 2009, 4:55:09 PM, you wrote:
the best known example is chessmate implementation in Wadler's why
functional programming matter
Aeh, ... Wadler's - Hughes'
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mailto:vo
like so:
otherwise = True
Ciao,
Janis.
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otherwise as a variable. But you do not
use that variable in that branch. Hence the warning:
Swish/HaskellRDF/SwishCommands.hs:304:12:
Warning: Defined but not used: `otherwise'
This has nothing to do with someone else shadowing the definition of
otherwise.
Ciao,
Janis.
--
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===
CALL FOR PAPERS
ACM SIGPLAN 2010 Workshop on
Partial Evaluation and Program Manipulation (PEPM'10)
Madrid, January 18-19, 2010
(Affiliated with POPL'10)
Hi all,
If you are anyway near Halle/Saale in June, be sure not to miss out on:
http://iba-cg.de/hal4.html
We have already close to 50 registered participants, so expect a very
lively meeting. See you there? (Late registration still possible.)
Ciao,
Janis.
--
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http
Janis Voigtlaender wrote:
Hi all,
If you are anyway near Halle/Saale in June, be sure not to miss out on:
I meant anywhere near, of course :-)
And even if you are not anyway or anywhere near, you might still want to
come just for the occasion :-)
--
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http
Hi all,
If you are anyway near Halle/Saale in June, be sure not to miss out on:
http://iba-cg.de/hal4.html
We have already close to 50 registered participants, so expect a very
lively meeting. See you there? (Late registration still possible.)
Ciao,
Janis.
--
Dr. Janis Voigtlaender
http
Janis Voigtlaender wrote:
Hi all,
If you are anyway near Halle/Saale in June, be sure not to miss out on:
I meant anywhere near, of course :-)
And even if you are not anyway or anywhere near, you might still want to
come just for the occasion :-)
--
Dr. Janis Voigtlaender
http
===
CALL FOR PAPERS
The Seventh Asian Symposium on
Programming Languages and Systems (APLAS 2009)
Seoul, December 14-16, 2009
of all that is going on in the community.
Feel free to circulate this announcement further in order to
reach people who might otherwise not see it. Enjoy!
Janis Voigtlaender
hcar at haskell.org
--
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http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:vo...@tcs.inf.tu-dresden.de
Lee Duhem wrote:
BTW, I notice Haskell-Cafe isn't in the To list, I hope this isn't in
purpose :-)
This was intended to avoid duplication, as I assume most people on
haskell-cafe also read haskell. But maybe this is not true...
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,
Janis.
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our coverage of all that is going on in the community.
Feel free to circulate this announcement further in order to
reach people who might otherwise not see it. Enjoy!
Janis Voigtlaender
hcar at haskell.org
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http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:vo...@tcs.inf.tu
?
Ciao, Janis.
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===
CALL FOR PAPERS
The Seventh Asian Symposium on
Programming Languages and Systems (APLAS 2009)
Seoul, December 14-16, 2009
Note that potential participants in the below summer school should
pre-register their interest *now*. The organizers need that information
to go ahead with the planning.
Matthew Fluet (ICFP Publicity Chair) wrote:
International Summer School on Advances in Programming Languages
===
CALL FOR PAPERS
The Seventh Asian Symposium on
Programming Languages and Systems (APLAS 2009)
Seoul, December 14-16, 2009
Note that potential participants in the below summer school should
pre-register their interest *now*. The organizers need that information
to go ahead with the planning.
Matthew Fluet (ICFP Publicity Chair) wrote:
International Summer School on Advances in Programming Languages
information can be found in the original Call for Contributions at:
http://www.haskell.org/pipermail/haskell/2009-April/021180.html
I look forward to receiving your contributions.
Thanks a lot,
Janis (current editor)
--
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http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:vo
information can be found in the original Call for Contributions at:
http://www.haskell.org/pipermail/haskell/2009-April/021180.html
I look forward to receiving your contributions.
Thanks a lot,
Janis (current editor)
--
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http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:vo
Vortrag + 30 min Diskussion.
Weitere Informationen auf http://www.iba-cg.de/hal4.html
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allows you to switch from an arbitrary type
to just integers, set t2=Int and simply use f to build a
order-preserving bijection between elements in the list x and a prefix
of [1,2,3,4,...]
Ciao, Janis.
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mailto:vo...@tcs.inf.tu
)
Martin Pluemicke (BA Stuttgart)
Arnd Poetzsch-Heffter (Univ. Kaiserslautern)
Peter Thiemann (Univ. Freiburg)
Janis Voigtlaender (TU Dresden)
Wolf Zimmermann (Univ. Halle)
Information about the main conference:
http://www.informatik2009.de
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complete entries if you have not changed them.
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complete entries if you have not changed them.
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=print
Prelude :t myprint
myprint :: (Show a) = a - IO ()
Can providing some type annotations (interactively in ghci or in some
.hs file) help solve the problem?
Yes.
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John Ky wrote:
Having created a new class is it possible to do some magic so that it
can be put it into a deriving clause?
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/derive
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with Debug.Trace.trace.
If so, can I prevent this using CPS?
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Janis Voigtlaender wrote:
Martin Hofmann wrote:
I've already posted this mail on haskell-cafe, but apparently the
subject suggested a too simple question, so I try it here again. I am
picking up a discussion with the same topic from haskell-users on
8th November.
Note that you have been
coverage of all that is going on in the community.
Feel free to circulate this announcement further in order to
reach people who might otherwise not see it. Enjoy!
Janis Voigtlaender
hcar at haskell.org
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mailto:[EMAIL PROTECTED
coverage of all that is going on in the community.
Feel free to circulate this announcement further in order to
reach people who might otherwise not see it. Enjoy!
Janis Voigtlaender
hcar at haskell.org
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http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:[EMAIL PROTECTED
, the November HCAR will also be coming. Rather soon now that
this cause for delay is out of the way.
Ciao, Janis.
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;-)
Ciao, Janis.
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Janis Voigtlaender wrote:
Luke Palmer wrote:
I've been wondering, is it ever possible to have two (extensionally)
different Functor instances for the same type? I do mean in Haskell;
i.e. (,) doesn't count. I've failed to either come up with any
examples or prove that they all must
since you assumed fmap even x = x !
Ciao, Janis.
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have
different funtor instances.
Ciao, Janis.
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suggest.
And finally, another plug: explanations for precisely the kind of
type-based reasoning I used in the earlier mail can be found in the
thesis I advertised today on the general list:
http://wwwtcs.inf.tu-dresden.de/~voigt/habil.pdf
Ciao, Janis.
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http://wwwtcs.inf.tu
and statements about them. The introductory example of the following
technical report may be amusing in that respect:
http://wwwtcs.inf.tu-dresden.de/~voigt/TUD-FI08-08.pdf
Ciao, Janis.
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http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:[EMAIL PROTECTED
. Janis Voigtlaender
http://wwwtcs.inf.tu-dresden.de/~voigt/
mailto:[EMAIL PROTECTED]
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deriver (makeZippable) using the derive-package. So no manual
boilerplate at all is necessary to use this version of generic zip.
(And there is also a tryZipWith.)
Ciao, Janis.
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mailto:[EMAIL PROTECTED
Alexey Khudyakov wrote:
putStrLn Ну и где этот ваш хвалёный уникод?
:-)
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Ryan Ingram wrote:
On Sat, Nov 22, 2008 at 5:33 AM, Janis Voigtlaender
[EMAIL PROTECTED] wrote:
You can generally make a persistent data structure with the same
asymptotic bounds as the ephemeral structure, ...
I would be very careful with the generally here. At least, I am not
aware
Henning Thielemann wrote:
On Sat, 22 Nov 2008, Janis Voigtlaender wrote:
Definitely. And that surfaces even in quite innocently looking programs
and statements about them. The introductory example of the following
technical report may be amusing in that respect:
http://wwwtcs.inf.tu
of proxy and translates any web page
my fuzzyfying monads.
So if he has duplicated anything, he has duplicated the whole internet.
Try to file a complaint about this ;-)
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you one could prove equivalence.
So, to be precise, the question you are interested in cannot even really
be asked at the moment.
Ciao, Janis.
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Rafal Kolanski wrote:
..., until I found someone's code
snippet online ... and extrapolated from that.
Oh yes, I love that kind of programming. Hardly possible in other
languages than Haskell. :-)
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or LaTeX
format. More information can be found in the original Call for
Contributions at
http://www.haskell.org/pipermail/haskell/2008-October/020651.html
I look forward to receiving your contributions.
Thanks a lot,
Janis (current editor)
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or LaTeX
format. More information can be found in the original Call for
Contributions at
http://www.haskell.org/pipermail/haskell/2008-October/020651.html
I look forward to receiving your contributions.
Thanks a lot,
Janis (current editor)
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http://wwwtcs.inf.tu-dresden.de
) - 0.5 - (round to integer) - 1
but
0.45 - (round to integer) - 0
That is of course true (and was the topic of heated discussion with my
fourth grade math teacher), but does not explain 2.5 - 2.
Ciao, Janis.
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mailto:[EMAIL PROTECTED
Felipe Lessa wrote:
On Mon, Oct 27, 2008 at 8:15 AM, Janis Voigtlaender
[EMAIL PROTECTED] wrote:
That is of course true (and was the topic of heated discussion with my
fourth grade math teacher), but does not explain 2.5 - 2.
If you round to odd instead of round to even, then 4.5 rounds
Janis Voigtlaender wrote:
2.4x - x
That's supposed to be 2.4x - 2, of course.
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was taught.
Ciao, Janis.
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Felipe Lessa wrote:
On Mon, Oct 27, 2008 at 8:30 AM, Janis Voigtlaender
[EMAIL PROTECTED] wrote:
Well, of course I did not learn to round to odd. I learned to round .5
to above, but not to do repeated rounding.
Nobody rounds in passes, of course =).
Oh, Mrs. I forgot her name actually
Ketil Malde wrote:
Janis Voigtlaender [EMAIL PROTECTED] writes:
If you round to odd instead of round to even, then 4.5 rounds to 5,
Well, of course I did not learn to round to odd. I learned to round .5
to above, but not to do repeated rounding.
Since just about every floating point
, but another world
(politically, pre-'89 ;-).
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explanation.
And yes, the avoiding bias explanation makes sense, but not the this
way of rounding makes repeated rounding safe explanation.
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Ketil Malde wrote:
Janis Voigtlaender [EMAIL PROTECTED] writes:
Since just about every floating point operation involves some sort of
loss of precision, repeated rounding is a fact of life.
Of course. But that was not the point of the discussion...
Well, allow me to contribute
format. More information can be found in the original Call for
Contributions at:
http://www.haskell.org/pipermail/haskell/2008-October/020651.html
I look forward to receiving your contributions.
Thanks a lot,
Janis (current editor)
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format. More information can be found in the original Call for
Contributions at:
http://www.haskell.org/pipermail/haskell/2008-October/020651.html
I look forward to receiving your contributions.
Thanks a lot,
Janis (current editor)
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- scramble x part.
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: main
*** Outstanding context : (Read b, Show b, Ord b)
The compiler doesn't know what kind of list you are trying to read,
sort, and print. Try something like:
(l::[Int]) - readLn
in the penultimate line.
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mailto
attitude. Such people
need to stop acting like five year old children.
Not that it has much to do with the debate, but the attitude you
complain about is the exact opposite of the attitude of any five year
old children that *I* know (well, my son primarily ;-).
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/gmane.comp.lang.haskell.cafe/45967
Thanks, Janis.
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, but it might be dropped if it is older than a year,
to give more room and more attention to projects that change a lot.
Do not resend complete entries if you have not changed them.
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, but it might be dropped if it is older than a year,
to give more room and more attention to projects that change a lot.
Do not resend complete entries if you have not changed them.
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Manlio Perillo wrote:
When I compare GPL and MIT/BSD licenses, I do a simple reasoning.
Suppose a doctor in a battle field meet a badly injuried enemy.
Should he help the enemy?
I'm so glad I don't understand this ;-)
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Thomas Davie wrote:
On 26 Sep 2008, at 12:12, Janis Voigtlaender wrote:
Manlio Perillo wrote:
When I compare GPL and MIT/BSD licenses, I do a simple reasoning.
Suppose a doctor in a battle field meet a badly injuried enemy.
Should he help the enemy?
I'm so glad I don't understand
, and then
calling
system (cmd ++ temp)
Of course, without actually creating that temporary file and having to
clean it up afterwards.
Does such a system' exist?
Thanks, Janis.
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Marc Weber wrote:
On Tue, Sep 23, 2008 at 01:37:56PM +0200, Janis Voigtlaender wrote:
Hi,
assume I have a program taking input from stdin. How do I call it from
Haskell while feeding to it a string as input.
Sure, have a look at
http://hackage.haskell.org/packages/archive/process/1.0.0.0
Jules Bean wrote:
Marc Weber wrote:
On Tue, Sep 23, 2008 at 01:37:56PM +0200, Janis Voigtlaender wrote:
Hi,
assume I have a program taking input from stdin. How do I call it from
Haskell while feeding to it a string as input.
Sure, have a look at
http://hackage.haskell.org/packages
Bulat Ziganshin wrote:
Is there a
a Haskell to Java compiler that's
already ready to use?
CAL
Just in case this answer was a bit cryptic for the original poster...
What Bulat means is the following:
http://labs.businessobjects.com/cal/
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or not your = is lazy. For
then proving that hypothesis, the paper (and probably other papers it
cites) also provides some techniques that might be of use to you.
Ciao, Janis.
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Don Stewart wrote:
If you can demonstrate the required laziness/strictness properties
are identical, looks like a nice idea.
I think they are not identical, as something along Antoine's second
example demonstrates.
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/704350.html)?
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with this.
BTW, you might want to have this kind of discussion at
[EMAIL PROTECTED] instead. See the announcement:
http://thread.gmane.org/gmane.comp.lang.haskell.general/16345
Ciao, Janis.
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