[Haskell-cafe] Conditional compilation for different versions of GHC?
Dear list, From ghc 7.0.1 release notes: The Language.Haskell.TH.Quote.QuasiQuoter type has two new fields: quoteType and quoteDec. Some of my code needs to be conditionally compiled to support both version 6 and 7, what is the recommended way to do it? ref: * http://new-www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Conditional compilation for different versions of GHC?
Thanks Michael, So the user should use `cabal install --flags -ghc7 package-name` to install the package, if I'm not mistaken? Will it work if the package is installed as a dependency? Will the flag environment be passed down from the root package? Is there a way to detect GHC version automatically? : ) Best, On Sun, Nov 28, 2010 at 1:32 AM, Michael Snoyman mich...@snoyman.com wrote: On Sat, Nov 27, 2010 at 6:59 PM, Jinjing Wang nfjinj...@gmail.com wrote: Dear list, From ghc 7.0.1 release notes: The Language.Haskell.TH.Quote.QuasiQuoter type has two new fields: quoteType and quoteDec. Some of my code needs to be conditionally compiled to support both version 6 and 7, what is the recommended way to do it? ref: * http://new-www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html Hi Jinjing, I've done this in Yesod. I'm not sure if it's the best way, but basically I've added a ghc7 flag to the cabal file, and a block for the library that reads: if flag(ghc7) build-depends: base = 4.3 5 cpp-options: -DGHC7 else build-depends: base = 4 4.3 Then whenever I want to quasi-quote in the code, I write: #if GHC7 [quasiquoter| #else [$quasiquoter| #endif Michael -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Conditional compilation for different versions of GHC?
Sorry, should be `cabal install --flags=ghc7 package-name`. On Sun, Nov 28, 2010 at 1:59 AM, Jinjing Wang nfjinj...@gmail.com wrote: Thanks Michael, So the user should use `cabal install --flags -ghc7 package-name` to install the package, if I'm not mistaken? Will it work if the package is installed as a dependency? Will the flag environment be passed down from the root package? Is there a way to detect GHC version automatically? : ) Best, On Sun, Nov 28, 2010 at 1:32 AM, Michael Snoyman mich...@snoyman.com wrote: On Sat, Nov 27, 2010 at 6:59 PM, Jinjing Wang nfjinj...@gmail.com wrote: Dear list, From ghc 7.0.1 release notes: The Language.Haskell.TH.Quote.QuasiQuoter type has two new fields: quoteType and quoteDec. Some of my code needs to be conditionally compiled to support both version 6 and 7, what is the recommended way to do it? ref: * http://new-www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html Hi Jinjing, I've done this in Yesod. I'm not sure if it's the best way, but basically I've added a ghc7 flag to the cabal file, and a block for the library that reads: if flag(ghc7) build-depends: base = 4.3 5 cpp-options: -DGHC7 else build-depends: base = 4 4.3 Then whenever I want to quasi-quote in the code, I write: #if GHC7 [quasiquoter| #else [$quasiquoter| #endif Michael -- jinjing -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Conditional compilation for different versions of GHC?
Hi Michael, you are absolutely correct, cabal did set the flags automatically.
To sum up, here's what needs to be done:
* add `flag ghc7` as a field in cabal
* add:
if flag(ghc7)
build-depends: base = 4.35
cpp-options: -DGHC7
else
build-depends: base = 4 4.3
in library field in cabal
* add `{-# LANGUAGE CPP #-}` in source file
* add
#if GHC7
x
#else
y
#endif
Hi Antonine, I don't know how to not set those fields in the
constructor.. as a QQ noob, I'm just hacking on some legacy code. This
code doesn't compile in GHC7, so I have to do this trick.
* https://github.com/nfjinjing/mps/blob/master/src/MPS/TH.hs
Best,
On Sun, Nov 28, 2010 at 3:48 AM, Michael Snoyman mich...@snoyman.com wrote:
On Sat, Nov 27, 2010 at 9:41 PM, Antoine Latter aslat...@gmail.com wrote:
On Sat, Nov 27, 2010 at 10:59 AM, Jinjing Wang nfjinj...@gmail.com wrote:
Dear list,
From ghc 7.0.1 release notes:
The Language.Haskell.TH.Quote.QuasiQuoter type has two new fields:
quoteType and quoteDec.
Some of my code needs to be conditionally compiled to support both
version 6 and 7, what is the recommended way to do it?
ref:
*
http://new-www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html
Can you just not set those fields? Then the code should work as-is for
both versions. You'll get warnings for GHC 7, I think.
Sorry Jinjing, I didn't read your original email carefully enough.
Antoine is absolutely correct, this is the better way to deal with
defining a quasiquoter. My suggestion is only necessary if you want to
*use* a quasiquoter.
Michael
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Re: [Haskell-cafe] Conditional compilation for different versions of GHC?
Hi Antoine, Thanks for pointing out, it did work.
By using a record style constructor, the code can be made to support
both version, something like
here = QuasiQuoter
{
quoteExp = (litE . stringL)
, quotePat = (litP . stringL)
}
in GHC7 there's a warning:
Warning: Fields of `QuasiQuoter' not initialised: quoteType, quoteDec
So far it works without problem.
On Sun, Nov 28, 2010 at 10:38 AM, Jinjing Wang nfjinj...@gmail.com wrote:
Hi Michael, you are absolutely correct, cabal did set the flags automatically.
To sum up, here's what needs to be done:
* add `flag ghc7` as a field in cabal
* add:
if flag(ghc7)
build-depends: base = 4.3 5
cpp-options: -DGHC7
else
build-depends: base = 4 4.3
in library field in cabal
* add `{-# LANGUAGE CPP #-}` in source file
* add
#if GHC7
x
#else
y
#endif
Hi Antonine, I don't know how to not set those fields in the
constructor.. as a QQ noob, I'm just hacking on some legacy code. This
code doesn't compile in GHC7, so I have to do this trick.
* https://github.com/nfjinjing/mps/blob/master/src/MPS/TH.hs
Best,
On Sun, Nov 28, 2010 at 3:48 AM, Michael Snoyman mich...@snoyman.com wrote:
On Sat, Nov 27, 2010 at 9:41 PM, Antoine Latter aslat...@gmail.com wrote:
On Sat, Nov 27, 2010 at 10:59 AM, Jinjing Wang nfjinj...@gmail.com wrote:
Dear list,
From ghc 7.0.1 release notes:
The Language.Haskell.TH.Quote.QuasiQuoter type has two new fields:
quoteType and quoteDec.
Some of my code needs to be conditionally compiled to support both
version 6 and 7, what is the recommended way to do it?
ref:
*
http://new-www.haskell.org/ghc/docs/7.0.1/html/users_guide/release-7-0-1.html
Can you just not set those fields? Then the code should work as-is for
both versions. You'll get warnings for GHC 7, I think.
Sorry Jinjing, I didn't read your original email carefully enough.
Antoine is absolutely correct, this is the better way to deal with
defining a quasiquoter. My suggestion is only necessary if you want to
*use* a quasiquoter.
Michael
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Re: [Haskell-cafe] Conditional compilation for different versions of GHC?
Thanks for explaining, it's a nice trick.
On Sun, Nov 28, 2010 at 11:16 AM, Antoine Latter aslat...@gmail.com wrote:
On Sat, Nov 27, 2010 at 8:38 PM, Jinjing Wang nfjinj...@gmail.com wrote:
Hi Michael, you are absolutely correct, cabal did set the flags
automatically.
To sum up, here's what needs to be done:
* add `flag ghc7` as a field in cabal
* add:
if flag(ghc7)
build-depends: base = 4.3 5
cpp-options: -DGHC7
else
build-depends: base = 4 4.3
in library field in cabal
* add `{-# LANGUAGE CPP #-}` in source file
* add
#if GHC7
x
#else
y
#endif
Hi Antonine, I don't know how to not set those fields in the
constructor.. as a QQ noob, I'm just hacking on some legacy code. This
code doesn't compile in GHC7, so I have to do this trick.
* https://github.com/nfjinjing/mps/blob/master/src/MPS/TH.hs
Something like:
myQuoter = QuasiQuoter {
quoteExp = expQuoter,
quotePat = patQuoter
}
Will work in either version, but it will leave the un-set fields set
to `undefined`, so you'll get a compile error if you try to use them.
I haven't tested this, but I've done it with other record types.
Take care,
Antoine
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Re: [Haskell-cafe] install GHC 7.0.1 RC on OS X?
you can: mv /Library/Frameworks/GHC.framework /Library/Frameworks/GHC.framework.2 then install GHC 7 just toggle between those paths to switch version ... On Tue, Nov 2, 2010 at 1:07 AM, Edward Amsden eca7...@cs.rit.edu wrote: I'd like to install the GHC 7.0.1 RC on my mac (Snow Leopard, x86_64), but I don't want it to run over my current GHC 6.12.2 install. If I use the .pkg installer, it doesn't allow me to select the destination, and I worry that it will overwrite my 6.12.2 install. If I try to build from source, that requires me to use my current GHC, which (as I understand) would build for 32 bit. What other options do I have, or am I misunderstanding something? -- Edward Amsden Undergraduate Computer Science Rochester Institute of Technology ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: String vs ByteString
John Millikin wrote: The reason many Japanese and Chinese users reject UTF-8 isn't due to space constraints (UTF-8 and UTF-16 are roughly equal), it's because they reject Unicode itself. +1. This is the thing Unicode advocates don't want to admit. Until Unicode has code points for _all_ Chinese and Japanese characters, there will be active resistance to adoption. -- Live well, ~wren For mainland chinese websites: Most that became popular during web 1.0 (5-10 years ago) are using utf-8 incompatible format, e.g. gb2312. for example: * www.sina.com.cn * www.sohu.com They didn't switch to utf-8 probably just because they never have to. However, many of the popular websites started during web 2.0 are adopting utf-8 for example: * renren.com (chinese largest facebook clone) * www.kaixin001.com (chinese second largest facebook clone) * t.sina.com.cn (an example of twitter clone) These websites adopted utf-8 because (I think) most web development tools have already standardized on utf-8, and there's little reason change it. I'm not aware of any (at least common) chinese characters that can be represented by gb2312 but not in unicode. Since the range of gb2312 is a subset of the range of gbk, which is a subset of the range of gb18030. And gb18030 is just another encoding of unicode. ref: * http://en.wikipedia.org/wiki/GB_18030 -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: [Haskell] ANNOUNCE: jhc 0.7.4
I think the default locale of the terminal app on snow leopard is utf-8.
I can also report that I have no problem compiling the tar version of
jhc 0.7.4 on snow leopard 10.6.4 using ghc 6.12.1, need to install the
editline package though.
On Sun, Jul 11, 2010 at 5:33 AM, John Meacham j...@repetae.net wrote:
On Sat, Jul 10, 2010 at 04:01:53PM -0500, Antoine Latter wrote:
* running DrIFT on src/E/TypeCheck.hs fails with an illegal
bytesequence in hGetContents. I'm guessing that this is only an issue
when building DrIFT with GHC 6.12+, and that the file contains bytes
illegal in UTF8. I deleted everything funny looking in the file and
then it went smooth
Hi, are you compiling from the tarball or the darcs repository? the
tarball shouldn't require DrIFT to be installed. I had not tested DrIFT
with 6.12 but that file should be in UTF8. Hmm... on OSX, is the default
locale a UTF8 one? does ghc 6.12 properly encode to/from utf8 on it by
defualt? could you check, I don't have a mac handy.
* The way you use sed doesn't work with the BSD sed that ships with my
Mac Book. Installing GNU sed and using it works. Similarly, BSD find
doesn't know about '-name', so make hl-clean results in sadness.
Hmm.. yeah, this has been reported before, but I was unable to reproduce
the problem. But I may have accidentally been using a GNU sed, my mac at
the time was highly gnu-ized. Could you send me a version that works.
* jhci works great, but jhc crashes when I try to compile something:
jhc test1.hs
jhc 0.7.4 (tokfekyuvi-27)
Finding Dependencies...
Using Ho Cache: '/Users/alatter/.jhc/cache'
Main [test1.hs]
Typechecking...
[1 of 1] Main (.)
test1.hs:9 - Warning: defaulting: t93 = Jhc.Basics.Integer
Compiling...
[1 of 1] Main
..
Collected Compilation...
-- typeAnalyzeMethods
-- BoxifyProgram
-- Boxy WorkWrap
-- LambdaLift
E
jhc: stdout: hPutChar: invalid argument (Illegal byte sequence)
Again, this seems like the handle is in UTF8 mode and we're trying to
output something non-UTF8.
Hmm.. clearly something about the locale is wrong... It is outputing a
unicode character there, but it shoudl translate adn display to utf8
just fine. perhaps ghc is not actually opening utf8 handles on your
platform...
* cabal install has a --jhc flag, but it doesn't seem to work:
cabal install byteorder --jhc
Resolving dependencies...
cabal: internal error: impossible
I have jhc installed in a non-standard location (under ${HOME}/usr) so
I may need to have some environment variables set up. This is wil
Cabal 1.8.0.4 and cabal-install 0.8.2
The cabal support for jhc never worked actually, it wasn't written by
me. There really isn't any easy way to integrate cabal with jhc right
now, and even if there was, all of hackage has ghc specific
dependencies. No doubt the solution to this problem will be involved, I
have conciously decided to not think about the issue until I have full
haskell 2010 support down pat. That will be more useful for writing
portable programs in the short run.
Keep up the good work!
I have an implementation for STRefs I threw together this afternoon
for jhc if you're interested. I can't test it properly, though, with
the compiler crash above.
Try without the '-v' flag, it shouldn't try printing the non ascii
character then. or modify src/Stats.hs and replacet all the C.char
constants with ascii equivalants. If there is a good way to test whether
the terminal supports non-ascii characters, that would be good to put a
test in jhc for.
John
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Re: [Haskell-cafe] proposal: HaBench, a Haskell Benchmark Suite
poor man's benchmark :) http://github.com/nfjinjing/bench-euler multi core aware, use bench-euler +RTS -N2 where 2 means 2 cores, and watch your cpu fries :) On Fri, Jun 25, 2010 at 7:24 AM, Andy Georges andy.geor...@elis.ugent.be wrote: Hi Simon et al, I've picked up the HaBench/nofib/nobench issue again, needing a decent set of real applications to do some exploring of what people these days call split-compilation. We have a framework that was able to explore GCC optimisations [1] -- the downside there was the dependency of these optimisations on each other, requiring them to be done in certain order -- for a multi-objective search space, and extended this to exploring a JIT compiler [2] for Java in our case -- which posed its own problems. Going one step further, we'd like to explore the tradeoffs that can be made when compiling on different levels: source to bytecode (in some sense) and bytecode to native. Given that LLVM is quicly becoming a state-of-the-art framework and with the recent GHC support, we figured that Haskell would be an excellent vehicle to conduct our exploration and research (and the fact that some people at our lab have a soft spot for Haskell helps too). Which brings me back to benchmarks. Are there any inputs available that allow the real part of the suite to run for a sufficiently long time? We're going to use criterion in any case given our own expertise with rigorous benchmarking [3,4], but since we've made a case in the past against short running apps on managed runtime systems [5], we'd love to have stuff that runs at least in the order of seconds, while doing useful things. All pointers are much appreciated. Or if any of you out there have (recent) apps with inputs that are open source ... let us know. -- Andy [1] COLE: Compiler Optimization Level Exploration, Kenneth Hoste and Lieven Eeckhout, CGO 2008 [2] Automated Just-In-Time Compiler Tuning, Kenneth Hoste, Andy Georges and Lieven Eeckhout, CGO 2010 [3] Statistically Rigorous Java Performance Evaluation, Andy Georges, Dries Buytaert and Lieven Eeckhout, OOPSLA 2007 [4] Java Performance Evaluation through Rigorous Replay Compilation, Andy Georges, Lieven Eeckhout and Dries Buytaert, OOPSLA 2008 [5] How Java Programs Interact with Virtual Machines at the Microarchitectural Level, Lieven Eeckhout, Andy Georges, Koen De Bosschere, OOPSLA 2003 ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] yet another functional reactive programming tutorial :)
Dear list, As I'm learning frp and reading the wonderful tutorial at http://www.formicite.com/dopage.php?frp/frp.html , I'm putting up some more basic cheatsheet style tutorial for myself. http://github.com/nfjinjing/frp-guide Feel free to take advantage of it. -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] About code style ?
fac n = let {
f = foldr (*) 1 [1..n]
} in f
:D
sorry for double reply, need to cc cafe, this is fun.
On Tue, Feb 2, 2010 at 4:33 PM, zaxis z_a...@163.com wrote:
thanks for all suggestions.
zaxis wrote:
For me i like C style instead of layout. For example,
func1 a = do
-- ...
a * 2
-- ...
I always write it as:
func1 a = do {
-- ...;
a * 2;
-- ...;
}
However, i donot know how to write pure function using C style.
func1 a = {
-- ...;
a * 2;
-- ...;
}
will not compile without `do`.
Sincerely!
-
fac n = foldr (*) 1 [1..n]
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Re: [Haskell-cafe] Web application interface
The hyena backend is essentially just a translator between hack and wai, i failed to finished it since I can't understand iteratee (seriously) and eventually got distracted ... What hyena tries to solve can't be realized in hack, so there's not too much reason for a backend anyway. Hyena is especially tuned for streaming and that's exactly what hack can't do (in practice). http://github.com/nfjinjing/hack-handler-hyena -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] GHC 6.12 on OS X 10.5
not sure if this helps, but try: # ports share lib export export CPATH=~/local/include export LIBRARY_PATH=~/local/lib export LD_LIBRARY_PATH=~/local/lib export DYLD_LIBRARY_PATH=~/local/lib replace ~/local/ with your ports path On Tue, Dec 22, 2009 at 5:43 AM, Tom Tobin korp...@korpios.com wrote: On Mon, Dec 21, 2009 at 1:38 PM, Tom Tobin korp...@korpios.com wrote: On Mon, Dec 21, 2009 at 4:32 AM, Conor McBride co...@strictlypositive.org wrote: I thought I'd record my upgrade exerience (so far) in case anyone else finds it useful, and (more selfishly) in case anyone has some helpful advice. Summary of situation You just described what I went through last night with GHC 6.12 before giving up and going to bed, except that I'm on Snow Leopard (OS X 10.6). I got the undefined symbols errors when trying to compile cpphs, which came up at some point in the build process when trying to install Happstack via cabal 0.8.0. I was wondering if if something was getting confused between my MacPorts libraries and OS X, and your experience certainly makes it seem that way; I have the MacPorts paths set up in my .cabal/config file as extra-include-dirs and extra-lib-dirs, otherwise I can't get particular libraries (e.g., pcre-lite) to compile. I'm going to wipe my .cabal and .ghc and try from scratch to build as much as possible without the MacPorts paths, only re-adding them for single builds as necessary; I'll write back after I see how that goes. This time, after wiping .ghc and .cabal, I immediately did cabal update followed by cabal install happstack (without going and changing the extra-include-* settings in .cabal/config to point at the MacPorts dirs). cpphs compiled fine this time, but I got a failure due to haskell-src-exts not building; haskell-src-exts in turn complained that happy wasn't installed. I went and installed happy, then haskell-src-exts (which installed v1.3.4), and then did cabal install happstack again which installed haskell-src-exts v1.0.1 (I guess GHC understands how to deal with two different installed library versions?). This time the install died on HJScript: ** [ 2 of 26] Compiling HJScript.Monad ( src/HJScript/Monad.hs, dist/build/HJScript/Monad.o ) src/HJScript/Monad.hs:51:10: A pattern match on a GADT requires -XGADTs In the pattern: EmptyBlock In the definition of `mappend': mappend EmptyBlock b = b In the instance declaration for `Monoid (Block ())' cabal: Error: some packages failed to install: HJScript-0.4.5 failed during the building phase. The exception was: ExitFailure 1 ** I have no idea what to do next, so I'll probably bring this particular issue up on the Happstack list next. My questions at this point: 1) The original problem definitely looks like it's related to library confusion between the system libs and the MacPorts libs. Is there any way of sanely handling this when I need a library that's available through MacPorts but not OS X's system libs? (MacPorts' insistence on maintaining an entirely separate library stack from the OS X system libraries is starting to make me crazy. ::sigh::) 2) Regarding haskell-src-exts: why wasn't happy wasn't pulled into the dependency graph in the first place? ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] ANN: moe html combinator
hand written html is fine, except for the closing tags: what if html' - do head' - do meta [http_equiv Content-Type, content text/html; charset-utf-8] (/) title' - str my title link [rel icon, _type image/png, href panda_icon.png] (/) body' - do div [_class container] - do str hello world produces html head meta http-equiv=Content-Type content=text/html; charset-utf-8 /meta title my title /title link rel=icon type=image/png href=panda_icon.png /link /head body div class=container hello world /div /body /html That's moe. There's also extra dsl sugar / flavors for your convienence, including (currently available) markdown and kawaii. It's a new library, tries to bring some haskell fun back to web programming, so .. enjoy. - moe: http://hackage.haskell.org/package/moe -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: yst 0.2.1
It's possible to serve the generated site with maid, in case apache is not available: cabal update cabal install maid yst create testsite cd testsite yst cd site maid now goto http://localhost:3000/ On Mon, Aug 3, 2009 at 9:05 AM, John MacFarlanej...@berkeley.edu wrote: I'm pleased to announce the release of yst, now available on HackageDB. yst generates static websites from YAML or CSV data files and StringTemplates. This approach combines the speed, security, and ease of deployment of a static website with the flexibility and maintainability of a dynamic site that separates presentation and data. The easiest way to get a feel for yst is to try it: cabal update cabal install yst yst create testsite cd testsite yst yst attempts to fill a niche between two kinds of site creation tools. On the one hand you have simple static site generators like webgen, webby, nanoc, and my old custom system using make and pandoc. On the other hand, you have dynamic web frameworks like rails and django. For my own smallish websites, I found that the dynamic frameworks were overkill. Nobody but me was going to edit the pages, and I didn't want the trouble of writing and deploying a dynamic site, setting up a web server, and administering a database. A static site would be faster, easier to deploy, and more secure. But the dynamic frameworks offered one thing that the static site generators did not: an easy way to separate data from presentation. This was becoming increasingly important to me as I found myself constantly updating the same information (say, publication data for a paper) in multiple places (say, a LaTeX CV and a differently formatted web listing of papers). What I wanted was a site generation tool that used YAML text files as a database and allowed different kinds of documents to be produced from the same data. I couldn't find anything that did just what I wanted, so I wrote yst. By way of illustration, here are the build instructions for HTML and LaTeX versions of a CV, plus a web page with a list of papers: - url: cv.html title: CV template: cv.st data_common: cvdata contact: from contact.yaml jobsbyemployer: from jobs.yaml order by start group by employer degrees: from degrees.yaml order by year desc awards: from awards.yaml order by year desc group by title papers: from papers.yaml order by year desc where (not (type = 'review')) reviews: from papers.yaml order by year desc where type = 'review' talks: from talks.yaml where date '2009-09-01' order by date desc group by title dissertations: from dissertations.yaml order by role then year group by role theses: from theses.yaml order by year then student courses: from courses.yaml order by number group by title data: : *cvdata html: yes - url: cv.tex title: CV inmenu: no template: cv.st layout: layout.tex.st data: : *cvdata html: yes - url: papers.html title: Papers template: papers.st data: papersbyyear: from papers.yaml order by year desc then title group by year yst's query language is limited, and there are lots of things you can do with a full-fledged database that you can't do with yst. But yst is ideal, I think, for small to medium data-driven sites that are maintained by a single person who likes working with plain text. It scratched my itch, anyway, and I release it in case anyone else has the same itch. Code, documentation, and bug reports: http://github.com/jgm/yst/tree/master John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Help needed to pick a better name then hack
Hack is such an inconvenient name for a package, may I get some inspiration from renaming it? Also, is there an idiom to use when upgrading package name on hackage? Best, -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] ANN: loli: a minimal web dev DSL
loli is a DSL built on hack. It allows you to easily define routes, build your custom template backends through a simple Template interface, and integrate with other hack middleware. * driver The simplest app looks like this import Network.Loli import Hack.Handler.Happstack main = run . loli $ get / (text loli power) * route get /hello $ do text hello will route /hello to a controller that outputs hello. * middleware using a middleware is just as declaring middleware lambda * template the template interface is class Template a where interpolate :: a - String - Context - IO String Context is just [(String, String)] After implementing your own template engine, you can use output $ your-engine-constructor template-name * demo I put the source of a dummy paste app on itself: http://lolipaste.easymic.com/0-lolipaste.haskell loli is on hackage, lolipaste is in loli repo on github: * http://github.com/nfjinjing/loli happy hacking -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] [ANN] Nemesis : easy task management
You can have a description file named Nemesis, with content nemesis = do clean [ **/*.hi , **/*.o , manifest ] task dist $ do sh cabal clean sh cabal configure sh cabal sdist task i (sh ghci -isrc src/System/Nemesis.hs) task manifest $ do sh find . | grep 'hs$' manifest then after run `nemesis`, there will be a compiled bin `nem` in your local path, which allows you to do `nem clean` Install with `cabal install nemesis` Cheers, -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: Cute Hack - Hyena handler + Bamboo Blog Engine :)
Yes, the spec is almost a direct translation from Rack. For middleware, I translated some from Rack, but it does not have to be a port. I'm just lazy. Rack borrowed some basic middleware from WSGI too, like Lint. About the style, it's a bit weird, yes. But only in module scope ;) On Sat, Apr 25, 2009 at 7:00 PM, Sebastiaan Visser sfvis...@cs.uu.nl wrote: What kind of port is this? Direct translation from ruby source? I see that you are using the (.) for OO-style reversed function application. Which feels a bit weird at first sight. Snippet from your Hack.Handler.Kibro: handle app = do env - get_env response - app env .liftIO -- set response response.headers.mapM_ (splash setHeader) response.status.show.setHeader Status response.body.output On Apr 25, 2009, at 7:58 AM, Jinjing Wang wrote: Hia, A few interesting progress on Hack: * many middleware ported from Rack, including a lambda! ( just like a pony for wsgi, and a lobster for rack ) * 2 handlers, one for Kibro on fcgi / lighttpd, one for Hyena web server * apps are portable, Bamboo is a port of Panda that runs on Hack, works fine with both handlers * Hyena handler is still experimental A lambda app looks like this -- Main.hs source module Main where import Hack import Hack.Utils import Hack.Handler.Hyena import Hack.Contrib.Lambda main = run $ lambda dummy_app -- compile ghc --make -O2 Main.hs -- run ./Main now go to http://localhost:3000/lambda Cheers, Links: * [Hack] (http://github.com/nfjinjing/hack/tree/master) * [Bamboo] (http://github.com/nfjinjing/bamboo/tree/master) -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] ANN: Cute Hack - Hyena handler + Bamboo Blog Engine :)
Hia, A few interesting progress on Hack: * many middleware ported from Rack, including a lambda! ( just like a pony for wsgi, and a lobster for rack ) * 2 handlers, one for Kibro on fcgi / lighttpd, one for Hyena web server * apps are portable, Bamboo is a port of Panda that runs on Hack, works fine with both handlers * Hyena handler is still experimental A lambda app looks like this -- Main.hs source module Main where import Hack import Hack.Utils import Hack.Handler.Hyena import Hack.Contrib.Lambda main = run $ lambda dummy_app -- compile ghc --make -O2 Main.hs -- run ./Main now go to http://localhost:3000/lambda Cheers, Links: * [Hack] (http://github.com/nfjinjing/hack/tree/master) * [Bamboo] (http://github.com/nfjinjing/bamboo/tree/master) -- jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] [ANN] Hack: a sexy Haskell Webserver Interface ^^
Simplest app should look like this
module Main where
import Hack
import Hack.Handler.Kibro
hello :: Application
hello = \env - return $ Response
{ status = 200
, headers = [ (Content-Type, text/plain) ]
, body= Hello World
}
main = run hello
Hack is a brainless port of the brilliant Ruby Rack framework. Rack is
very modular and that's
very important.
Rack utilities and middlewares should be able to be ported with
minimal effort, I hope.
link / source: http://github.com/nfjinjing/hack/tree/master
--
jinjing
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[Haskell-cafe] message passing style in Monad
I found that as I can do xs.map(+1).sort by redefine . to be a . f = f a infixl 9 . I can also do readFile readme.markdown . lines . length by making a . b = a .liftM b infixl 9 . Kinda annoying, but the option is there. - jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: message passing style in Monad
sorry about the confusion, too much drinks. I used the redefined . in the difination of .. it should really just be flip liftM On Wed, Sep 10, 2008 at 9:14 PM, jinjing [EMAIL PROTECTED] wrote: I found that as I can do xs.map(+1).sort by redefine . to be a . f = f a infixl 9 . I can also do readFile readme.markdown . lines . length by making a . b = a .liftM b infixl 9 . Kinda annoying, but the option is there. - jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] experimental static blog engine in Haskell (file based, markdown syntax)
It's up ( I think, since it's my first cabal ). cabal install panda kibro new ttmyblog cd myblog rm -r db; rm -r public git clone git://github.com/nfjinjing/panda-template.git db sh db/scripts/bootstrap.sh kibro start On Sun, Sep 7, 2008 at 4:26 AM, Don Stewart [EMAIL PROTECTED] wrote: nfjinjing: Hia, It's called Panda. It's pretty young, no theme, no tags, no comments, around 360 lines of code and uses Kibro to bootstrap. hosted on GitHub: http://github.com/nfjinjing/panda/ a quick demo at: http://jinjing.blog.easymic.com/ Awesome! Kibro seems to be taking off. Will you release it on hackage.haskell.org? -- Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] experimental static blog engine in Haskell (file based, markdown syntax)
Hia, It's called Panda. It's pretty young, no theme, no tags, no comments, around 360 lines of code and uses Kibro to bootstrap. hosted on GitHub: http://github.com/nfjinjing/panda/ a quick demo at: http://jinjing.blog.easymic.com/ cheers, - jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] ANN: Haskore tutorial (programming music using Haskell)
Thanks Henk-Jan van Tuyl,
It's been updated/changed accordingly.
jinjing
On Fri, Aug 8, 2008 at 1:42 AM, Henk-Jan van Tuyl [EMAIL PROTECTED] wrote:
On Tue, 05 Aug 2008 10:59:10 +0200, jinjing [EMAIL PROTECTED] wrote:
Hi there,
Here's the project link:
http://github.com/nfjinjing/haskore-guide/tree/master/doc/index.markdown
I found Haskore pretty fun :) so I'm documenting it while learning it.
Please don't hesitate to give suggestions / corrections.
About the installation section: I think beginners will be grateful if you
write down the full darcs get commands and explain the --global parameter
of the cabal install command.
There are two more packages that need to be downloaded:
- package hosc depends on package binary
- package haskore depends on package unix
Windows users will be grateful if you tell them that Haskore cannot be built
on Windows, because of the dependance on the unix package. It would have
saved me a lot of time if I knew that beforehand.
For the people interested in porting Haskore to Windows I'll describe what I
have done so far:
src\Haskore\Basic\Timer\Posix.hs:
System.Posix.Unistd.usleep replaced by Control.Concurrent.threadDelay
(of course, the name of the file is not correct after this; better put the
timer function in another file)
File Haskore.cabal:
removed unix from section Build-depends
Added to cabal file:
if os(windows)
cpp-options: -DWIN32
Added to src\Haskore\Interface\CSound\Play.lhs:
{-# OPTIONS -cpp #-}
and around the signal handling part and the line
import qualified System.Posix.Signals as Signals
:
#ifndef WIN32
...
#endif
Same treatment for src/Haskore/Interface/MIDI/Play.lhs
Finally I discovered that in the file
src/Haskore/Interface/SuperCollider/Channel/Env.hs
environment variables are set and that there is no setEnv or putEnv for
Windows.
GCC knows the function setenv(), but that function does not work as expected
(on Windows); once the program terminates, the created environment variable
has dissapeared. After I discovered that, I decided it would be too much yak
shaving for me to go on. To solve this problem, on would either create an
improved setenv() function, or redesign Haskore to pass the information some
other way (and of course the program(s) that read this information).
--
Met vriendelijke groet,
Henk-Jan van Tuyl
--
http://functor.bamikanarie.com
http://Van.Tuyl.eu/
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[Haskell-cafe] ANN: Haskore tutorial (programming music using Haskell)
Hi there, Here's the project link: http://github.com/nfjinjing/haskore-guide/tree/master/doc/index.markdown I found Haskore pretty fun :) so I'm documenting it while learning it. Please don't hesitate to give suggestions / corrections. Questions: * How much music theory should be there ? ( I'm gonna learn those anyway ) * What kind of examples would be cool ? regards, jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] parallel_map_reduce, in easy one liner mod
Hi haskellers, So.. the type says it all p_map_reduce :: ([a] - b) - (b - b - b) - [a] - b so the idea is to write your computation extensive funciton as a map_reduce function, simplest example: sum ( can be seen as map id then reduce (+) ) then instead of calling: sum xs just call: p_map_reduce sum (+) xs the function in the background will split the xs into 16 parts, and use all your cores to process the computation. Enless the computation from the map_reduce function is too trivial or the list is too small, it should bump all your cores to 100% usage, and linearly increase overall performance. You can customize the number of parts by calling the helper function p_map_reduce_to I hope this can be useful to someone besides me :) here is the code warning: i'm using a very annoying coding style, by redefining the (.) operater to be reverse application. Please forgive me and metally transform the order, or just pretend you are reading Java / Python / Ruby or whatever :) module Main where import Data.List import Control.Parallel import Prelude hiding ((.)) -- for my poor oo mind (.) :: a - (a - b) - b a . f = f a infixl 9 . (...) :: (b - c) - (a - b) - a - c (...) f g x = f (g x) -- helpers reduce = foldl1 in_group_of n [] = [] in_group_of n xs = xs.take(n) : xs.drop(n).in_group_of(n) split_ton xs = xs.in_group_of(size) where size = if xs.length n then n else xs.length `div` n -- parallel processing p_eval' xs = xs.pseq(xs.reduce(par)) p_reduce' op xs = xs.p_eval'.reduce(op) p_map_reduce_to n m r xs = xs.split_to(n).map(m).p_reduce'(r) p_map_reduce m r xs = p_map_reduce_to 16 m r xs -- test fib 0 = 0 fib 1 = 1 fib n = fib (n-1) + fib (n-2) fibs xs = xs.map(fib).sum test_list = replicate 50 30 s_fibs= test_list.fibs p_fibs= test_list.p_map_reduce fibs (+) main = p_fibs.show.putStrLn ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] message passing style like in Haskell?
After some fiddling with this style, here is what I came up with for the 8 queens problem in the 99 problem set. It's quite entertaining ... ( note: it's brute force and requires a combination library ) queens2 n = n.permutations.filter all_satisfied where all_satisfied queens = queens.diff_col queens.diff_diag diff_col queens = queens.unique.is queens diff_diag queens = n .combinations 2 .map (map (subtract 1)) .map (id flip cherry_pick queens) .any same_dist.not where same_dist (row_pair, col_pair) = row_pair.foldl1 (-).abs == col_pair.foldl1 (-).abs -- generic helper cherry_pick ids xs = ids.map (xs !!) is a b = a == b unique xs = nub xs Guess this can conclude this experiment :) jinjing On Sun, Jun 22, 2008 at 1:10 AM, Ian Lynagh [EMAIL PROTECTED] wrote: On Fri, Jun 20, 2008 at 07:57:58AM +0200, Ketil Malde wrote: Albert Y. C. Lai [EMAIL PROTECTED] writes: While we are kind of on this topic, what makes the characters ħ þ prefix operator by default, while º and most other odd ones infix? alphanumeric vs non-alphanumeric Testing this, I find that isAlpha is True also for 'º', but as the OP claims, Haskell will use it as a(n infix) symbol. This is a bug in GHC. The characters = '\255' were done specially, but incorrectly for many of those = '\128'. I'll fix it, probably by just removing the specialisation for them. Thanks Ian ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] message passing style like in Haskell?
Hi guys, This is my second attempt to learn Haskell :) Any way here's the code: module Dot where import Prelude hiding ( (.) ) (.) :: a - (a - b) - b a . f = f a infixl 9 . So for example, 99 questions: Problem 10 (*) Run-length encoding of a list. comparing: encode xs = map (\x - (length x,head x)) (group xs) to encode xs = xs.group.map token where token x = (x.length, x.head) I found starting with data and working my way to a solution seems to be easier to think with, or maybe it's just me ... What is your thought? Jinjing ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
