[Haskell-cafe] Re: wanted: haskell one-liners (in the perl sense of one-liners)
To answer my original question, here's a few ways to accomplish what I
wanted with haskell
Perl is still a lot faster than ghc -e, but I guess if you wanted
speed you could compile first.
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ls -l
total 16
-rw-r--r-- 1 thartman thartman 2726 Dec 20 07:56 UnixTools.hs
-rw-r--r-- 1 thartman thartman 82 Jan 7 07:18 echo.hs
-rwxr--r-- 1 thartman thartman 790 Mar 4 05:02 oneliners.sh
-rwxr--r-- 1 thartman thartman 646 Mar 4 04:18 oneliners.sh~
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ./oneliners.sh
haskell, ghc -e pipe
16
real0m1.652s
user0m0.600s
sys 0m0.030s
**
haskell, hmap pipe
16
real0m1.549s
user0m0.410s
sys 0m0.200s
**
haskell, two pipes
16
real0m2.153s
user0m0.900s
sys 0m0.370s
**
perl, two pipes
16
real0m0.185s
user0m0.010s
sys 0m0.100s
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ cat oneliners.sh
hmap (){ ghc -e interact ($*); }
hmapl (){ hmap unlines.($*).lines ; }
hmapw (){ hmapl map (unwords.($*).words) ; }
function filesizes () {
find -maxdepth 1 -type f | xargs du
}
echo haskell, ghc -e pipe
time filesizes | ghc -e 'interact $ (++\n) . show . sum . map ( (
read :: String - Integer ) . head . words ) . lines '
echo **
echo haskell, hmap pipe
time filesizes | hmap '(++\n) . show . sum . map ( ( read :: String
- Integer ) . head . words ) . lines'
echo **
echo haskell, two pipes
time filesizes | hmapl map ( head . words ) | hmap '(++\n) . show
. sum . map ( read :: String - Integer ) . lines'
echo **
echo perl, two pipes
time filesizes | perl -ane 'print $F[0]\n' | perl -e '$sum += $_
while ; print $sum\n'
2007/3/2, Thomas Hartman [EMAIL PROTECTED]:
Okay, I am aware of
http://haskell.org/haskellwiki/Simple_unix_tools
which gives some implementation of simple unix utilities in haskell.
But I couldn't figure out how to use them directly from the shell, and
of course that's what most readers will probably wnat.
Or let me put it another way.
Is there a way to do
find -maxdepth 1 -type f | xargs du | perl -ane 'print \$F[0]\n' |
perl -e '$sum += $_ while ; print $sum\n'
as a shell command that idiomatically uses haskell?
For non-perlers, that sums up the disk usage of all files in the
current directory, skipping subdirs.
print \$F[0]\n
looks at the first (space delimited) collumn of output.
perl -e '$sum += $_ while ; print $sum\n'
, which is I guess the meat of the program, sums up all the numbers
spewed out of the first column, so in the end you get a total.
So, anyone out there want to establish a haskell one liner tradition?
:)
thomas.
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Re: [Haskell-cafe] Re: wanted: haskell one-liners (in the perl sense of one-liners)
There's some nice one liners bundled with h4sh:
http://www.cse.unsw.edu.au/~dons/h4sh.html
For example:
http://www.cse.unsw.edu.au/~dons/h4sh.txt
If you recall, h4sh is a set of unix wrappers to the list library.
I still use them everyday, though probably should put out a new release
soon.
-- Don
tphyahoo:
To answer my original question, here's a few ways to accomplish what I
wanted with haskell
Perl is still a lot faster than ghc -e, but I guess if you wanted
speed you could compile first.
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ls -l
total 16
-rw-r--r-- 1 thartman thartman 2726 Dec 20 07:56 UnixTools.hs
-rw-r--r-- 1 thartman thartman 82 Jan 7 07:18 echo.hs
-rwxr--r-- 1 thartman thartman 790 Mar 4 05:02 oneliners.sh
-rwxr--r-- 1 thartman thartman 646 Mar 4 04:18 oneliners.sh~
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ./oneliners.sh
haskell, ghc -e pipe
16
real0m1.652s
user0m0.600s
sys 0m0.030s
**
haskell, hmap pipe
16
real0m1.549s
user0m0.410s
sys 0m0.200s
**
haskell, two pipes
16
real0m2.153s
user0m0.900s
sys 0m0.370s
**
perl, two pipes
16
real0m0.185s
user0m0.010s
sys 0m0.100s
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ cat oneliners.sh
hmap (){ ghc -e interact ($*); }
hmapl (){ hmap unlines.($*).lines ; }
hmapw (){ hmapl map (unwords.($*).words) ; }
function filesizes () {
find -maxdepth 1 -type f | xargs du
}
echo haskell, ghc -e pipe
time filesizes | ghc -e 'interact $ (++\n) . show . sum . map ( (
read :: String - Integer ) . head . words ) . lines '
echo **
echo haskell, hmap pipe
time filesizes | hmap '(++\n) . show . sum . map ( ( read :: String
- Integer ) . head . words ) . lines'
echo **
echo haskell, two pipes
time filesizes | hmapl map ( head . words ) | hmap '(++\n) . show
. sum . map ( read :: String - Integer ) . lines'
echo **
echo perl, two pipes
time filesizes | perl -ane 'print $F[0]\n' | perl -e '$sum += $_
while ; print $sum\n'
2007/3/2, Thomas Hartman [EMAIL PROTECTED]:
Okay, I am aware of
http://haskell.org/haskellwiki/Simple_unix_tools
which gives some implementation of simple unix utilities in haskell.
But I couldn't figure out how to use them directly from the shell, and
of course that's what most readers will probably wnat.
Or let me put it another way.
Is there a way to do
find -maxdepth 1 -type f | xargs du | perl -ane 'print \$F[0]\n' |
perl -e '$sum += $_ while ; print $sum\n'
as a shell command that idiomatically uses haskell?
For non-perlers, that sums up the disk usage of all files in the
current directory, skipping subdirs.
print \$F[0]\n
looks at the first (space delimited) collumn of output.
perl -e '$sum += $_ while ; print $sum\n'
, which is I guess the meat of the program, sums up all the numbers
spewed out of the first column, so in the end you get a total.
So, anyone out there want to establish a haskell one liner tradition?
:)
thomas.
___
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Re: [Haskell-cafe] Re: wanted: haskell one-liners (in the perl sense of one-liners)
That seems like a really great thing to have. But I had troubles installing it.
h4sh depends on hs-plugins.
And...
[EMAIL PROTECTED]:~/haskellInstalls/hs-plugins$ ./Setup.lhs configure
Setup.lhs: Warning: The field hs-source-dir is deprecated, please
use hs-source-dirs.
Configuring plugins-1.0...
configure: /usr/local/bin/ghc-pkg
configure: Dependency base-any: using base-2.0
configure: Dependency Cabal-any: using Cabal-1.1.6
Setup.lhs: cannot satisfy dependency haskell-src-any
[EMAIL PROTECTED]:~/haskellInstalls/hs-plugins$
Advice?
2007/3/4, Donald Bruce Stewart [EMAIL PROTECTED]:
There's some nice one liners bundled with h4sh:
http://www.cse.unsw.edu.au/~dons/h4sh.html
For example:
http://www.cse.unsw.edu.au/~dons/h4sh.txt
If you recall, h4sh is a set of unix wrappers to the list library.
I still use them everyday, though probably should put out a new release
soon.
-- Don
tphyahoo:
To answer my original question, here's a few ways to accomplish what I
wanted with haskell
Perl is still a lot faster than ghc -e, but I guess if you wanted
speed you could compile first.
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ls -l
total 16
-rw-r--r-- 1 thartman thartman 2726 Dec 20 07:56 UnixTools.hs
-rw-r--r-- 1 thartman thartman 82 Jan 7 07:18 echo.hs
-rwxr--r-- 1 thartman thartman 790 Mar 4 05:02 oneliners.sh
-rwxr--r-- 1 thartman thartman 646 Mar 4 04:18 oneliners.sh~
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ./oneliners.sh
haskell, ghc -e pipe
16
real0m1.652s
user0m0.600s
sys 0m0.030s
**
haskell, hmap pipe
16
real0m1.549s
user0m0.410s
sys 0m0.200s
**
haskell, two pipes
16
real0m2.153s
user0m0.900s
sys 0m0.370s
**
perl, two pipes
16
real0m0.185s
user0m0.010s
sys 0m0.100s
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ cat oneliners.sh
hmap (){ ghc -e interact ($*); }
hmapl (){ hmap unlines.($*).lines ; }
hmapw (){ hmapl map (unwords.($*).words) ; }
function filesizes () {
find -maxdepth 1 -type f | xargs du
}
echo haskell, ghc -e pipe
time filesizes | ghc -e 'interact $ (++\n) . show . sum . map ( (
read :: String - Integer ) . head . words ) . lines '
echo **
echo haskell, hmap pipe
time filesizes | hmap '(++\n) . show . sum . map ( ( read :: String
- Integer ) . head . words ) . lines'
echo **
echo haskell, two pipes
time filesizes | hmapl map ( head . words ) | hmap '(++\n) . show
. sum . map ( read :: String - Integer ) . lines'
echo **
echo perl, two pipes
time filesizes | perl -ane 'print $F[0]\n' | perl -e '$sum += $_
while ; print $sum\n'
2007/3/2, Thomas Hartman [EMAIL PROTECTED]:
Okay, I am aware of
http://haskell.org/haskellwiki/Simple_unix_tools
which gives some implementation of simple unix utilities in haskell.
But I couldn't figure out how to use them directly from the shell, and
of course that's what most readers will probably wnat.
Or let me put it another way.
Is there a way to do
find -maxdepth 1 -type f | xargs du | perl -ane 'print \$F[0]\n' |
perl -e '$sum += $_ while ; print $sum\n'
as a shell command that idiomatically uses haskell?
For non-perlers, that sums up the disk usage of all files in the
current directory, skipping subdirs.
print \$F[0]\n
looks at the first (space delimited) collumn of output.
perl -e '$sum += $_ while ; print $sum\n'
, which is I guess the meat of the program, sums up all the numbers
spewed out of the first column, so in the end you get a total.
So, anyone out there want to establish a haskell one liner tradition?
:)
thomas.
___
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Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
___
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Haskell-Cafe@haskell.org
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Re: [Haskell-cafe] Re: wanted: haskell one-liners (in the perl sense of one-liners)
Yes, it definitely is a little lagged. It should be ported to use lazy
bytestrings too. I wsa more suggesting the one liners as examples of
haskell use in the shell.
tphyahoo:
That seems like a really great thing to have. But I had troubles installing
it.
h4sh depends on hs-plugins.
And...
[EMAIL PROTECTED]:~/haskellInstalls/hs-plugins$ ./Setup.lhs configure
Setup.lhs: Warning: The field hs-source-dir is deprecated, please
use hs-source-dirs.
Configuring plugins-1.0...
configure: /usr/local/bin/ghc-pkg
configure: Dependency base-any: using base-2.0
configure: Dependency Cabal-any: using Cabal-1.1.6
Setup.lhs: cannot satisfy dependency haskell-src-any
[EMAIL PROTECTED]:~/haskellInstalls/hs-plugins$
Advice?
2007/3/4, Donald Bruce Stewart [EMAIL PROTECTED]:
There's some nice one liners bundled with h4sh:
http://www.cse.unsw.edu.au/~dons/h4sh.html
For example:
http://www.cse.unsw.edu.au/~dons/h4sh.txt
If you recall, h4sh is a set of unix wrappers to the list library.
I still use them everyday, though probably should put out a new release
soon.
-- Don
tphyahoo:
To answer my original question, here's a few ways to accomplish what I
wanted with haskell
Perl is still a lot faster than ghc -e, but I guess if you wanted
speed you could compile first.
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ls -l
total 16
-rw-r--r-- 1 thartman thartman 2726 Dec 20 07:56 UnixTools.hs
-rw-r--r-- 1 thartman thartman 82 Jan 7 07:18 echo.hs
-rwxr--r-- 1 thartman thartman 790 Mar 4 05:02 oneliners.sh
-rwxr--r-- 1 thartman thartman 646 Mar 4 04:18 oneliners.sh~
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ./oneliners.sh
haskell, ghc -e pipe
16
real0m1.652s
user0m0.600s
sys 0m0.030s
**
haskell, hmap pipe
16
real0m1.549s
user0m0.410s
sys 0m0.200s
**
haskell, two pipes
16
real0m2.153s
user0m0.900s
sys 0m0.370s
**
perl, two pipes
16
real0m0.185s
user0m0.010s
sys 0m0.100s
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ cat oneliners.sh
hmap (){ ghc -e interact ($*); }
hmapl (){ hmap unlines.($*).lines ; }
hmapw (){ hmapl map (unwords.($*).words) ; }
function filesizes () {
find -maxdepth 1 -type f | xargs du
}
echo haskell, ghc -e pipe
time filesizes | ghc -e 'interact $ (++\n) . show . sum . map ( (
read :: String - Integer ) . head . words ) . lines '
echo **
echo haskell, hmap pipe
time filesizes | hmap '(++\n) . show . sum . map ( ( read :: String
- Integer ) . head . words ) . lines'
echo **
echo haskell, two pipes
time filesizes | hmapl map ( head . words ) | hmap '(++\n) . show
. sum . map ( read :: String - Integer ) . lines'
echo **
echo perl, two pipes
time filesizes | perl -ane 'print $F[0]\n' | perl -e '$sum += $_
while ; print $sum\n'
2007/3/2, Thomas Hartman [EMAIL PROTECTED]:
Okay, I am aware of
http://haskell.org/haskellwiki/Simple_unix_tools
which gives some implementation of simple unix utilities in haskell.
But I couldn't figure out how to use them directly from the shell, and
of course that's what most readers will probably wnat.
Or let me put it another way.
Is there a way to do
find -maxdepth 1 -type f | xargs du | perl -ane 'print \$F[0]\n' |
perl -e '$sum += $_ while ; print $sum\n'
as a shell command that idiomatically uses haskell?
For non-perlers, that sums up the disk usage of all files in the
current directory, skipping subdirs.
print \$F[0]\n
looks at the first (space delimited) collumn of output.
perl -e '$sum += $_ while ; print $sum\n'
, which is I guess the meat of the program, sums up all the numbers
spewed out of the first column, so in the end you get a total.
So, anyone out there want to establish a haskell one liner tradition?
:)
thomas.
___
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Re: [Haskell-cafe] Re: wanted: haskell one-liners (in the perl sense of one-liners)
I think I could have most of the oneliner goodness of h4sh, without
having to do the module install, if I could figure out a way to
include modules with ghc -e.
or, alternatively some way to specify modules as a ghc flag, analogous to
perl -MPath::To::Module -e 'commands'
Can this be made to work?
(From http://haskell.org/haskellwiki/Simple_unix_tools, which seems to
be repeated somehow in h4sh, although I'm not completely certain on
that.)
***
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ echo 1234 | ghc
-e 'interact id'
1234
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ echo 1234 | ghc
-e 'UnixTools.cat'
interactive:1:0:
Bad interface file: UnixTools.hi
UnixTools.hi: openBinaryFile: does not exist (No such file or directory)
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ head -n23 UnixTools.hs
module UnixTools where
--
-- Some unix-like tools written in simple, clean Haskell
--
--
import Data.List
import Data.Char
import System.IO
import Text.Printf
.
-- The 'cat' program
--
cat = interact id
2007/3/4, Donald Bruce Stewart [EMAIL PROTECTED]:
Yes, it definitely is a little lagged. It should be ported to use lazy
bytestrings too. I wsa more suggesting the one liners as examples of
haskell use in the shell.
tphyahoo:
That seems like a really great thing to have. But I had troubles installing
it.
h4sh depends on hs-plugins.
And...
[EMAIL PROTECTED]:~/haskellInstalls/hs-plugins$ ./Setup.lhs configure
Setup.lhs: Warning: The field hs-source-dir is deprecated, please
use hs-source-dirs.
Configuring plugins-1.0...
configure: /usr/local/bin/ghc-pkg
configure: Dependency base-any: using base-2.0
configure: Dependency Cabal-any: using Cabal-1.1.6
Setup.lhs: cannot satisfy dependency haskell-src-any
[EMAIL PROTECTED]:~/haskellInstalls/hs-plugins$
Advice?
2007/3/4, Donald Bruce Stewart [EMAIL PROTECTED]:
There's some nice one liners bundled with h4sh:
http://www.cse.unsw.edu.au/~dons/h4sh.html
For example:
http://www.cse.unsw.edu.au/~dons/h4sh.txt
If you recall, h4sh is a set of unix wrappers to the list library.
I still use them everyday, though probably should put out a new release
soon.
-- Don
tphyahoo:
To answer my original question, here's a few ways to accomplish what I
wanted with haskell
Perl is still a lot faster than ghc -e, but I guess if you wanted
speed you could compile first.
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ls -l
total 16
-rw-r--r-- 1 thartman thartman 2726 Dec 20 07:56 UnixTools.hs
-rw-r--r-- 1 thartman thartman 82 Jan 7 07:18 echo.hs
-rwxr--r-- 1 thartman thartman 790 Mar 4 05:02 oneliners.sh
-rwxr--r-- 1 thartman thartman 646 Mar 4 04:18 oneliners.sh~
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ ./oneliners.sh
haskell, ghc -e pipe
16
real0m1.652s
user0m0.600s
sys 0m0.030s
**
haskell, hmap pipe
16
real0m1.549s
user0m0.410s
sys 0m0.200s
**
haskell, two pipes
16
real0m2.153s
user0m0.900s
sys 0m0.370s
**
perl, two pipes
16
real0m0.185s
user0m0.010s
sys 0m0.100s
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$
[EMAIL PROTECTED]:~/learning/haskell/UnixTools$ cat oneliners.sh
hmap (){ ghc -e interact ($*); }
hmapl (){ hmap unlines.($*).lines ; }
hmapw (){ hmapl map (unwords.($*).words) ; }
function filesizes () {
find -maxdepth 1 -type f | xargs du
}
echo haskell, ghc -e pipe
time filesizes | ghc -e 'interact $ (++\n) . show . sum . map ( (
read :: String - Integer ) . head . words ) . lines '
echo **
echo haskell, hmap pipe
time filesizes | hmap '(++\n) . show . sum . map ( ( read :: String
- Integer ) . head . words ) . lines'
echo **
echo haskell, two pipes
time filesizes | hmapl map ( head . words ) | hmap '(++\n) . show
. sum . map ( read :: String - Integer ) . lines'
echo **
echo perl, two pipes
time filesizes | perl -ane 'print $F[0]\n' | perl -e '$sum += $_
while ; print $sum\n'
2007/3/2, Thomas Hartman [EMAIL PROTECTED]:
Okay, I am aware of
http://haskell.org/haskellwiki/Simple_unix_tools
which gives some implementation of simple unix utilities in haskell.
But I couldn't figure out how to use them directly from the shell, and
of course that's what most readers will probably wnat.
Or let me put it another way.
Is there a way to do
find -maxdepth 1 -type f | xargs du | perl -ane 'print \$F[0]\n' |
perl -e '$sum += $_ while ; print $sum\n'
as a shell command that idiomatically uses haskell?
For non-perlers, that sums up the disk usage of all files in the
current directory, skipping subdirs.
print \$F[0]\n
looks at the first (space delimited)
Re: [Haskell-cafe] Re: wanted: haskell one-liners (in the perl sense of one-liners)
On Mar 4, 2007, at 6:31 , Thomas Hartman wrote: Setup.lhs: cannot satisfy dependency haskell-src-any Used to be bundled, now unbundled. On debian/ubuntu check your libghc6-*-dev packages. (libghc6-haskell-src-dev?) -- brandon s. allbery[linux,solaris,freebsd,perl] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] MPTCs and rigid variables
Hello, There is nothing wrong with this program. I have run into this problem and I consider it to be a bug/weakness of the type checking algorithm used by the implementation. (I also agree with you that the term rigid variable is rather confusing because it is an artifact of the type checking algorithm used by GHC.) -Iavor On 3/3/07, David House [EMAIL PROTECTED] wrote: class Foo a b | a - b instance Foo Int String bar :: Foo Int b = b bar = rargh Is there any reason why that shouldn't work? GHC gives one of its silly b is a rigid variable errors (aside: that's a really confusing error; I'd prefer something like Hugs's Infered type is not general enough). -- -David House, [EMAIL PROTECTED] ___ 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] auto-completion for Vim 7
Hi, I started to write a Vim script for the new omni-completion feature of Vim 7. If you use Vim you might want to check it out: * download http://stephan.walter.name/files/haskellcomplete.vim and put it in ~/.vim/plugin * :set omnifunc=haskellcomplete#CompleteHaskell * press c-xc-o to complete (The advantage of omni-completion over normal completion using c-n and c-p is that you can write you own function which does some smart guessing to offer good completions) So far the functionality is *very* limited. It will autocomplete a few functions from the prelude as well as functions in the current file that have a type declaration. If you look through the source code of the script, you'll see that I have included some function names and types from the standard libraries. Before I continue this (rather tedious) work, I wanted to know what the cafe patrons think about it. If someone knows of a simple way to generate a function/type list of the standard modules, I'd love to hear about it. Generating such a list on the fly each time is probably not an option, as it would be too slow. -Stephan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] auto-completion for Vim 7
Hi If someone knows of a simple way to generate a function/type list of the standard modules, I'd love to hear about it. Generating such a list on the fly each time is probably not an option, as it would be too slow. Using a recent version of haddock, the --hoogle flag gives you exactly what you want. Thanks Neil ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] wanted: haskell one-liners (in the perl sense of one-liners)
Thomas Hartman wrote: Is there a way to do perl one-liner gibberish as a shell command that idiomatically uses haskell? I used to do those in Perl, too, years ago. I switched to the readable step-by-step style of the Python shell when I moved from Perl to Python. It is a whole different mentality about how to work, but in the end it is equally powerful and beautiful. Now that I am a Haskell person, I find that the Python style is a perfect fit for Haskell shells such as GHCi. The :def command in GHCi makes this really powerful (though I find that I rarely need that much power). You can kind of fake the one-liner style in Python, but it is awkward. I assume that the same would be true in Haskell (though I admit that I never tried it very seriously). Unless you define all kinds of single-character abbreviations, in which case why not just use Perl? Regards, Yitzchak ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: auto-completion for Vim 7
Hi Neil, Neil Mitchell wrote: Using a recent version of haddock, the --hoogle flag gives you exactly what you want. I tried that but I guess I was too impatient to figure out what exactly haddock wants (it seemed to choke on #ifdefs), so I just used the hoogle.txt from darcs and ran it through sed. Now the vim script is 190kb big, but it seems to work more or less. Maybe I'll have to remove some entries that nobody uses anyway, like System.Win32.* ;-) -Stephan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: auto-completion for Vim 7
Hi I tried that but I guess I was too impatient to figure out what exactly haddock wants (it seemed to choke on #ifdefs), so I just used the hoogle.txt from darcs and ran it through sed. Haddock can't cope with #ifdef's, or .lhs files - haddock-ghc will be able to (the next version), so hopefully soon you'll have less of a problem. I just use runhaskell Setup haddocck --hoogle through Cabal, and that handles preprocessing etc. Of course, taking hoogle.txt gives you the same result (thats how I got hoogle.txt) and less work :) Thanks Neil ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: auto-completion for Vim 7
On Sun, Mar 04, 2007 at 07:58:59PM +, Neil Mitchell wrote: Hi I tried that but I guess I was too impatient to figure out what exactly haddock wants (it seemed to choke on #ifdefs), so I just used the hoogle.txt from darcs and ran it through sed. Haddock can't cope with #ifdef's, or .lhs files - haddock-ghc will be able to (the next version), so hopefully soon you'll have less of a problem. I just use runhaskell Setup haddocck --hoogle through Cabal, and that handles preprocessing etc. Of course, taking hoogle.txt gives you the same result (thats how I got hoogle.txt) and less work :) Is haddock-ghc still the next version? It wouldn't even compile without minor modifications (it seems to be incompatible with the current version of cabal); and when I tried to run it: [EMAIL PROTECTED]:/tmp/HAppS_0$ haddock-ghc --html --dump-interface=dist/doc/html/HAppS.haddock --prologue=HAppS-0.9.0-haddock-prolog.txt --use-package=HaXml-1.13.2 --use-package=mtl-1.0 --use-package=network-2.0 --use-package=stm-2.0 --use-package=template-haskell-2.0 --use-package=regex-compat-0.71 --use-package=binary-0.2 --use-package=HList-0.1 --title=HAppS-0.9.0: --odir=dist/doc/html `find dist/build/tmp/src/HAppS -name '*.hs'` Warning: Cannot use package base: HTML directory /usr/local/share/ghc-6.7.20070223/html/libraries/base does not exist. haddock-ghc: panic! (the 'impossible' happened) (GHC version 6.7.20070223 for i386-unknown-linux): a static opt was looked at too early! Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug (Is it still worth reporting if it is the GHC API?) ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] auto-completion for Vim 7
If someone knows of a simple way to generate a function/type list of the standard modules, I'd love to hear about it. Generating such a list on the fly each time is probably not an option, as it would be too slow. Using a recent version of haddock, the --hoogle flag gives you exactly what you want. Neil: is there any documentation on the output format? i couldn't find the flag in the haddock manual, so i was surprised to see it in haddock --help; it works, though, and does seem to generate modules with implementations removed, and some declarations simplified? one problem with this is that hoogle.txt is not included with releases, nor are the library sources, so this route won't be available for most ghc users. that is why my Doc.vim, announced earlier today, extracts information somewhat tediously from the haddock html index files that are included at least with windows releases. Stephan: if your goal is intelligent, context-aware completion, that's quite ambituous for Haskell!-) you might want to reuse the more simple-minded completion and information extraction included in Doc.vim as a start, so that you can focus on the more interesting context-sensitive bits. the current version of Doc.vim allows to write out the docindex, once extracted from the haddocks, and with simple reading it back in rather than re-generation, completion seems reasonably quick. Doc.vim supports CTRL-X CTRL-U insert-mode completion by looking for matching prefixes in the docindex, including all unqualified names in the libraries. one can also separately qualify names. if you want (naive) completion based on text in imported files as well, you can tell Vim's standard insert-mode completion (CTRL-N) to follow imports, by using 'set include= ' and 'set includeexpr= '. there's an example in the by now ancient hugs.vim at http://www.cs.kent.ac.uk/~cr3/toolbox/haskell/Vim/ to provide completion also for non-libraries identifiers, perhaps completion based on tags-files (as generated by :ctags in ghci), via CTRL-X CTRL-] , might be a good approach. those tags-file don't include type info yet, but then i'm not quite sure how you'd be able to use type info for completion in Vim (which doesn't know anything about Haskell types). ghc -e :ctags Main.hs ought to give you a tags file, including exported identifiers in your project, but not in the libraries. with these three completion variants, one can get by, though putting everything together and adding at least some context-sensitivity would be nice. the haddock --hoogle route has the additional issue that it will miss identifiers without type declarations. you could use ghc itself to provide identifier lists: $ ghc -e :b Data.Char digitToInt :: Char - Int data Char type String = [Char] chr :: Int - Char .. with the obvious disadvantage that you'd need to name every module. but you could get those from 'ghc-pkg describe base'. anyway, let us know about any progress with such Haskell/Vim utilities. claus ps. i'm still rehacktoring Doc.vim, adding and removing bugs and features, but don't want to bother the list with updated versions. a recent one, including functions for writing/reading docindex, can be found here: http://www.cs.kent.ac.uk/~cr3/toolbox/haskell/Vim/Doc.vim ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] auto-completion for Vim 7
Hi Claus, Neil: is there any documentation on the output format? i couldn't find the flag in the haddock manual, so i was surprised to see it in haddock --help; it works, though, and does seem to generate modules with implementations removed, and some declarations simplified? Documentation isn't my strong point :) It was originally only intended to be an internal thing for Hoogle, but it does seem generally useful. Perhaps changing it to --summary, documenting it, and more formally specifying the output format (along with an AST/printer/parser) would be a good plan. one problem with this is that hoogle.txt is not included with releases, nor are the library sources, so this route won't be available for most ghc users. that is why my Doc.vim, announced earlier today, extracts information somewhat tediously from the haddock html index files that are included at least with windows releases. You can always download hoogle.txt, or perhaps we could supply summary.txt with the HTML output as the documentation? The GHC people would have to be the ones to decide it - Hugs doesn't ship with documentation anyway. My experience with parsing haddock generated HTML is that its painful, and usually wrong. The indexes might be a bit clearer, but parsing out the type signatures and names was a nightmare. the haddock --hoogle route has the additional issue that it will miss identifiers without type declarations. you could use ghc itself to provide identifier lists: ghc-haddock will fix that. Extracting names from the index will also miss those without type signatures. $ ghc -e :b Data.Char digitToInt :: Char - Int data Char type String = [Char] chr :: Int - Char I experimented with this as the means for getting information for Hoogle. It was fine, apart from extracting instances (you needed the instance and the type both to be in scope, which you can't really do, or the instance is missed). The only tip I'd give is make sure you specify -fglasgow-exts, I remember some issue if that was missed with functions that were using # in their name - no idea on the exact issue but that flag fixed it. Thanks Neil ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Safe top-level IORefs
I'm posting the code of a module, IORefs, allowing top-level IORefs to
be safely declared and used. Usafety reports are welcome. Tested in GHC 6.6.
** Features:
1) IORef a provided for any Typeable a
2) An unbounded number of IORef's can be declared
3) An IORef declaration is 3 lines long (+ optional type signature)
4) Each IORef has its own starting value
5) Referential transparency:
no NOINLINE, no unsafePerformIO is needed in the user module
6) Negligible overhead: O(1) in the usual usage pattern
(neglecting a O(log n) setup phase)
** Usage:
import Data.Typeable
import Data.IORef
import IORefs
data X deriving Typeable -- the actual name of the IORef
instance IORefDefault X Int where ioRefDefault _ = 42 -- type+default
x = ioRef (undefined :: X) -- a convenient name for the IORef
x :: IORef Int -- optional signature
-- Still the same IORef as x !
y :: IORef Int
y = ioRef (undefined :: X)
main = do
let printX = readIORef x = print
printX -- 42
writeIORef x 3
printX -- 3
modifyIORef x succ
printX -- 4
modifyIORef y succ -- y is equal to x, so...
printX -- 5
-- ... the above is actually equivalent to
modifyIORef (ioRef (undefined :: X) :: IORef Int) succ
printX -- 6
Passing a non _|_ value to ioRef does not break the abstraction: ioRef
ignores this value. Similarly, ioRef always calls ioRefDefault with _|_,
so writing (ioRef (X1 :: X)) and (ioRef (X2 :: X)) will not cause the
initial value to be ill-defined, i.e. depending on which expression is
evaluated first.
On performance: ioRef takes O(log n) to return, where n is the number of
refs previous created by ioRef. In the common usage pattern, ioRef is
used only in a top-level definition. If no inlining happens, we pay only
a startup cost: then all IORefs are available in O(1). If inlining
happens, or if we use ioRef as in the last lines of main above, we pay
the log(n) price. Note that inlining only affects the performance, and
not the semantics.
Assumptions/known glitches:
1) We rely on cast from Typeable
2) GHCi is known not to reinitialize the refs on reload.
3) No multithreading support for now.
4) The IORefs module uses a memoization technique, relying on a
classic top-level IORef declared through NOINLINE + unsafePerformIO.
Regards,
Zun.
===
{-# OPTIONS_GHC -Wall -fglasgow-exts #-}
module IORefs (ioRef, IORefDefault, ioRefDefault) where
import qualified Data.Map as M
import System.IO.Unsafe
import Data.IORef
import Data.Typeable
class (Typeable a, Typeable b) = IORefDefault a b | a - b where
ioRefDefault :: a - b
data Ref = forall a . Typeable a = Ref (IORef a)
type RefMap = M.Map TypeRep Ref
{-# NOINLINE refs #-} -- This is crucial
refs :: IORef RefMap
refs = unsafePerformIO $ newIORef M.empty
-- This is like a memoized function, so inlining this should be safe.
-- (Needs locking for multithread, though.)
ioRef :: forall a b . IORefDefault a b = a - IORef b
ioRef x = unsafePerformIO $
do
rs - readIORef refs
case typeOf x `M.lookup` rs of
Nothing - do
ref - newIORef $ ioRefDefault (undefined :: a)
writeIORef refs $ M.insert (typeOf x) (Ref ref) rs
return ref
Just (Ref aRef) - case cast aRef of
Nothing - error $ ioRef: impossible!
Just ref - return ref
-- Should be in Data.Typeable
instance Ord TypeRep where compare x y = compare (show x) (show y)
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Re: [Haskell-cafe] Safe top-level IORefs
Neil Mitchell wrote: Hi On 3/4/07, Roberto Zunino [EMAIL PROTECTED] wrote: I'm posting the code of a module, IORefs, allowing top-level IORefs to be safely declared and used. Usafety reports are welcome. Tested in GHC 6.6. That looks cool, does it work on Hugs? I've tested it right now. Yes, it works with -98, but you have to provide a (correct!) instance of Typeable X on your own. Declaring a ref becomes a bit more cumbersome: data X -- the actual name of the IORef instance Typeable X where typeOf _ = mkTyConApp (mkTyCon Main.X) [] instance IORefDefault X Int where ioRefDefault _ = 42 -- initial value x = ioRef (undefined :: X) -- a convenient name for the IORef It would be better to use drift to write the instance for you, since getting that wrong breaks Typeable, and ioRef roo. Finally, IORefs.ioRef must be changed to use asTypeOf. Zun. -- Hugs GHC version ioRef :: IORefDefault a b = a - IORef b ioRef x = unsafePerformIO $ do rs - readIORef refs case typeOf x `M.lookup` rs of Nothing - do ref - newIORef $ ioRefDefault (undefined `asTypeOf` x) writeIORef refs $ M.insert (typeOf x) (Ref ref) rs return ref Just (Ref aRef) - case cast aRef of Nothing - error $ ioRef: impossible! Just ref - return ref ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Any interested authors?
Dave Thomas (from The Pragmatic Programmers, not from Wendy's :)) has announced an Erlang book (http://www.pragmaticprogrammer.com/titles/jaerlang/) in the Ruby mailing list. A few responses showed an interest in a similar book for Haskell. You can see the thread here: http://tinyurl.com/2ecpsn. Dave answered such requests by saying: I'd love to do one. It's a question of finding the right author.. If you think this would be up your alley, perhaps you could contact Dave in regards to this matter. Just a heads up, from a potential reader. :) Regards, Antonio -- http://antoniocangiano.com Zen and the Art of Ruby Programming ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: ANN: HSH 1.2.0
The Makefile in the HSH distribution should do this for you. But you can say: ghc --make -o setup -package Cabal Setup.lhs A40:/home/daf/Hsh/hsh}ghc --make -o setup -package Cabal Setu.lhs ghc-6.2.2: unknown package name: Cabal I'm working on getting ghc 6.6 built and installed. Gmake Currently exits on these errors: == gmake all -r; in /home/daf/Ghc/ghc-6.6/compiler == gmake all -r; in /home/daf/Ghc/ghc-6.6/rts ../compiler/ghc-inplace -optc-O -optc-L/usr/local/lib -optc-Wall -optc-W -optc-Wstrict-prototypes -optc-Wmissing-prototypes -optc-Wmissing-declarations -optc-Winline -optc-Waggregate-return -optc-Wbad-function-cast -optc-I../includes -optc-I. -optc-Iparallel -optc-DCOMPILING_RTS -optc-fomit-frame-pointer -optc-fno-strict-aliasing -H16m -O -L/usr/local/lib -optc-O2 -static -I. -#include HCIncludes.h -optc-fno-stack-protector -fvia-C -dcmm-lint -c Linker.c -o Linker.o Linker.c: In function `addDLL': Linker.c:1026: warning: assignment discards qualifiers from pointer target type Linker.c: In function `loadObj': Linker.c:1350: error: `MAP_32BIT' undeclared (first use in this function) Linker.c:1350: error: (Each undeclared identifier is reported only once Linker.c:1350: error: for each function it appears in.) Linker.c: In function `x86_64_high_symbol': Linker.c:2789: error: `MAP_32BIT' undeclared (first use in this function) Linker.c:2789: error: `MAP_ANONYMOUS' undeclared (first use in this function) gmake[1]: *** [Linker.o] Error 1 gmake: *** [stage1] Error 1 A40:/home/daf/Ghc/ghc-6.6} I'm not quite sure what to do with MAP_32BIT since I'm running in AMD 64-bit mode. Any suggestions? ./setup configure ./setup build (as root) ./setup install On 2007-03-03, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I just tried to make HSH 1.2 but it needs Cabal, which I apparently don't have installed. I also don't have runghc installed (referenced at cabal homepage). Using ghc instead failed as follows: Setup.lhs:2: Failed to load interface for `Distribution.Simple': *** Deleting temp files Deleting: /home/daf/Tmp/ghc27809.hc /home/daf/Tmp/ghc27809.lpp Warning: deleting non-existent /home/daf/Tmp/ghc27809.hc A40:/home/daf/Hsh/hsh}ghc Setup.lhs configure Setup.lhs:2: Failed to load interface for `Distribution.Simple': A40:/home/daf/Hsh/hsh} This suggests to me that my Haskell setup is not complete. What do I need to do to get to the point where I can build HSH? Thanks. -- John Goerzen Author, Foundations of Python Network Programming http://www.amazon.com/exec/obidos/tg/detail/-/1590593715 ___ 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
Re: [Haskell-cafe] Re: wanted: haskell one-liners (in the perl senseof one-liners)
I think I could have most of the oneliner goodness of h4sh, without having to do
the module install, if I could figure out a way to include modules with ghc -e.
i confess myself to be among those who underappreciated ghc -e, until this
thread:)
as Joachim said (thanks for starting this, btw;-), we can use qualified names
$ echo hello world | hmap 'map Char.toUpper'
HELLO WORLD
and to get at your other methods, the question is not how to include modules
with ghc -e; instead, recall that ghc -e supplies a command to be evaluated
within the context of its parameter module (single input for a ghci session):
$ cat Imports.hs
import Debug.Trace
helper x = trace hi there (x+1)
$ ghc -e 'helper 41' Imports.hs
hi there
42
as to the original question in this thread, my .bashrc now also has a few less
symmetric entries:
function hrunl { ghc -e interact(show.($*).lines); }
function hrunw { ghc -e interact(show.($*).words); }
function hrunwl { ghc -e interact(show.($*).map words.lines); }
using which the one-liner becomes something like
find -maxdepth 1 -type f | xargs du | hrunwl sum . map (read . head)
(the find/du is better left in shell tool land, it seems, and default Num is
Integer)
hth,
claus
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[Haskell-cafe] Re: ANN: HSH 1.2.0
On 2007-03-04, [EMAIL PROTECTED], Feustel dfeustel@mindspring.com [EMAIL PROTECTED] wrote: The Makefile in the HSH distribution should do this for you. But you can say: ghc --make -o setup -package Cabal Setup.lhs A40:/home/daf/Hsh/hsh}ghc --make -o setup -package Cabal Setu.lhs ghc-6.2.2: unknown package name: Cabal Ahh. You will certainly need GHC 6.6 for HSH; see the list of prerequisites in the README or at http://software.complete.org/hsh/wiki/RelatedSoftware gmake[1]: *** [Linker.o] Error 1 gmake: *** [stage1] Error 1 A40:/home/daf/Ghc/ghc-6.6} I'm not quite sure what to do with MAP_32BIT since I'm running in AMD 64-bit mode. Any suggestions? This is out of my league to answer, but if you tell us about your platform, I bet we can find you some precompiled binaries for it. -- John ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: ANN: HSH 1.2.0
On 2007-03-04, [EMAIL PROTECTED], Feustel dfeustel@mindspring.com [EMAIL PROTECTED] wrote: The Makefile in the HSH distribution should do this for you. But you can say: ghc --make -o setup -package Cabal Setup.lhs A40:/home/daf/Hsh/hsh}ghc --make -o setup -package Cabal Setu.lhs ghc-6.2.2: unknown package name: Cabal Ahh. You will certainly need GHC 6.6 for HSH; see the list of prerequisites in the README or at http://software.complete.org/hsh/wiki/RelatedSoftware gmake[1]: *** [Linker.o] Error 1 gmake: *** [stage1] Error 1 A40:/home/daf/Ghc/ghc-6.6} I'm not quite sure what to do with MAP_32BIT since I'm running in AMD 64-bit mode. Any suggestions? This is out of my league to answer, but if you tell us about your platform, I bet we can find you some precompiled binaries for it. -- John I'm running AMD 64-bit OpenBSD 4.0. There is a downlevel package for ghc. I think I have found the cause of the undefined MAP_ANONYMOUS. It looks like that symbol was changed to MAP_ANON in sys/mmap.h for OpenBSD. I fixed(?) that and now the MAP_32BIT symbol is the current roadblock. As far as I can tell, this symbol is not defined anywhere in OpenBSD at the moment. I've done some googling but I still don't know what to do with this symbol. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Re: ANN: HSH 1.2.0
On 2007-03-04, [EMAIL PROTECTED], Feustel dfeustel@mindspring.com [EMAIL PROTECTED] wrote: The Makefile in the HSH distribution should do this for you. But you can say: ghc --make -o setup -package Cabal Setup.lhs A40:/home/daf/Hsh/hsh}ghc --make -o setup -package Cabal Setu.lhs ghc-6.2.2: unknown package name: Cabal Ahh. You will certainly need GHC 6.6 for HSH; see the list of prerequisites in the README or at http://software.complete.org/hsh/wiki/RelatedSoftware gmake[1]: *** [Linker.o] Error 1 gmake: *** [stage1] Error 1 A40:/home/daf/Ghc/ghc-6.6} I'm not quite sure what to do with MAP_32BIT since I'm running in AMD 64-bit mode. Any suggestions? This is out of my league to answer, but if you tell us about your platform, I bet we can find you some precompiled binaries for it. -- John I'm running AMD 64-bit OpenBSD 4.0. There is a downlevel package for ghc. I think I have found the cause of the undefined MAP_ANONYMOUS. It looks like that symbol was changed to MAP_ANON in sys/mmap.h for OpenBSD. I fixed(?) that and now the MAP_32BIT symbol is the current roadblock. As far as I can tell, this symbol is not defined anywhere in OpenBSD at the moment. I've done some googling but I still don't know what to do with this symbol. Since there seems to be no MAP_32BIT in OpenBSD, I set the symbol to 0 and gmake got through Linker.c. Gmake now is running toward completion of the make. I have my fingers crossed :-). ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: ANN: HSH 1.2.0
dfeustel: On 2007-03-04, [EMAIL PROTECTED], Feustel dfeustel@mindspring.com [EMAIL PROTECTED] wrote: The Makefile in the HSH distribution should do this for you. But you can say: ghc --make -o setup -package Cabal Setup.lhs A40:/home/daf/Hsh/hsh}ghc --make -o setup -package Cabal Setu.lhs ghc-6.2.2: unknown package name: Cabal Ahh. You will certainly need GHC 6.6 for HSH; see the list of prerequisites in the README or at http://software.complete.org/hsh/wiki/RelatedSoftware gmake[1]: *** [Linker.o] Error 1 gmake: *** [stage1] Error 1 A40:/home/daf/Ghc/ghc-6.6} I'm not quite sure what to do with MAP_32BIT since I'm running in AMD 64-bit mode. Any suggestions? This is out of my league to answer, but if you tell us about your platform, I bet we can find you some precompiled binaries for it. -- John I'm running AMD 64-bit OpenBSD 4.0. There is a downlevel package for ghc. I think I have found the cause of the undefined MAP_ANONYMOUS. It looks like that symbol was changed to MAP_ANON in sys/mmap.h for OpenBSD. I fixed(?) that and now the MAP_32BIT symbol is the current roadblock. As far as I can tell, this symbol is not defined anywhere in OpenBSD at the moment. I've done some googling but I still don't know what to do with this symbol. Since there seems to be no MAP_32BIT in OpenBSD, I set the symbol to 0 and gmake got through Linker.c. Gmake now is running toward completion of the make. I have my fingers crossed :-). Yes, I'm thinking the build system shouldn't even include Linker.c if you're not attempting to build ghci. -- Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Re: ANN: HSH 1.2.0
On Mon, Mar 05, 2007 at 01:37:20AM +, Dave Feustel wrote: I think I have found the cause of the undefined MAP_ANONYMOUS. It looks like that symbol was changed to MAP_ANON in sys/mmap.h for OpenBSD. I fixed(?) that and now the MAP_32BIT symbol is the current roadblock. As far as I can tell, this symbol is not defined anywhere in OpenBSD at the moment. I've done some googling but I still don't know what to do with this symbol. Since there seems to be no MAP_32BIT in OpenBSD, I set the symbol to 0 and gmake got through Linker.c. Gmake now is running toward completion of the make. I have my fingers crossed :-). According to my (Linux) mmap(2), MAP_32BIT says to only allocate addresses that can be cast to 32bits losslessly. Of course, there's no guarantee that NOT specifying it will result in addresses that are truncated, so if you're unlucky this could introduce a latent bug. As in nothing happens for months, then one day ghc uses a lot of ram, and POP! sigsegv, by which time you've completely forgotten about the kluge you used to compile it, and you won't be able to figure out what broke. Check your man 2 mmap for the appropriate define ... Stefan ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: Re: [Haskell-cafe] Build failed - hidden package ?
Yes, that did the trick. Thank You. -Puvodni zprava- Od: J. Garrett Morris [mailto:[EMAIL PROTECTED] Komu: Dunric [EMAIL PROTECTED] Předmět: Re: [Haskell-cafe] Build failed - hidden package ? Hello, Are you building with Cabal? In case you are, Cabal hides all packages by default and only shows those which are mentioned in your cabal file. To fix this, you can add 'base' to the build-depends: list. If you're not using Cabal, I don't have a clue. (-; Good luck! /g On 2/26/07, Dunric [EMAIL PROTECTED] wrote: Hi. I've got stuck with the following compilation error I probably can't fully understand: -- Building library... ... Using package config file: /usr/local/lib/ghc-6.6/package.conf wired-in package base mapped to base-2.0 wired-in package rts mapped to rts-1.0 wired-in package haskell98 mapped to haskell98-1.0 wired-in package template-haskell mapped to template-haskell-2.0 Hsc static flags: -static ... Graphics/UI/SDL/Rotozoomer.hs:15:7: Could not find module `Foreign.C': it is a member of package base, which is hidden -- What does such error mean ? Modules Foreign and Foreign.C are installed and available from the default path. Lines 12-15 of Rotozoomer.hs: -- module Graphics.UI.SDL.Rotozoomer where import Foreign import Foreign.C -- Any idea what's wrong, resp. some explanation why compilation fails ? Thanks in an advance. -- www.icqsms.cz ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe -- It is myself I have never met, whose face is pasted on the underside of my mind. -- www.icqsms.cz ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Haskell 6.6 problem
make and make install of ghc 6.6 completed successfully, but exe generated by ghc fails to load. ===test.hs=== main :: IO() main = putStr This is a test\n = ghc test.hs compilation IS NOT required /usr/bin/ld: cannot find -lgmp collect2: ld returned 1 exit status Is there a simple way to fix this? Thanks. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell 6.6 problem
On Mar 5, 2007, at 1:22 , Dave Feustel wrote: ghc test.hs compilation IS NOT required /usr/bin/ld: cannot find -lgmp collect2: ld returned 1 exit status Is there a simple way to fix this? You failed to mention the platform you're on, but at a guess you are missing the libgmp and/or libgmp-dev(el) package(s) for your platform. -- brandon s. allbery[linux,solaris,freebsd,perl] [EMAIL PROTECTED] system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED] electrical and computer engineering, carnegie mellon universityKF8NH ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] Haskell 6.6 problem
dfeustel: make and make install of ghc 6.6 completed successfully, but exe generated by ghc fails to load. ===test.hs=== main :: IO() main =putStr This is a test\n = ghc test.hs compilation IS NOT required /usr/bin/ld: cannot find -lgmp collect2: ld returned 1 exit status Is there a simple way to fix this? that's a missing argument to ld to tell it to look in /usr/local for openbsd libs. Edit: ~/lib/ghc-6.6/package.conf under wherever you installed ghc 6.6. and add: -L/usr/local/lib to this ldOptions field. So it looks like this: ..., ldOptions = [-L/usr/local/lib,-u,base_GHCziBase_Izh_static_info, ... that should ensure libgmp if always found by the linker. -- Don ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
[Haskell-cafe] Haskell Weekly News: March 05, 2007
---
Haskell Weekly News
http://sequence.complete.org/hwn/20070305
Issue 58 - March 05, 2007
---
Welcome to issue 58 of HWN, a weekly newsletter covering developments
in the [1]Haskell community.
1. http://haskell.org/
Announcements
New Book - Programming in Haskell. Graham Hutton [2]announced a new
Haskell textbook: [3]Programming in Haskell. This introduction is
ideal for beginner programmers: it requires no previous programming
experience and all concepts are explained from first principles via
carefully chosen examples. Each chapter includes exercises that range
from the straightforward to extended projects, plus suggestions for
further reading on more advanced topics. The presentation is clear and
simple, and benefits from having been refined and class-tested over
several years.
2. http://article.gmane.org/gmane.comp.lang.haskell.general/14849
3. http://www.cs.nott.ac.uk/~gmh/book.html
Gtk2Hs version 0.9.11. Duncan Coutts [4]announced Gtk2Hs - a GUI
Library for Haskell based on Gtk+, version 0.9.11, is [5]now
available. Gtk2Hs features: automatic memory management; Unicode
support; nearly full coverage of Gtk+ 2.8 API; support for several
additional Gtk+/Gnome modules (Glade visual GUI builder, cairo vector
graphics, SVG rendering, OpenGL extension and more).
4. http://article.gmane.org/gmane.comp.lang.haskell.general/14934
5. http://haskell.org/gtk2hs/download/
cabal-make version 0.1. Conal Elliott [6]announced Cabal-make, a GNU
make include file to be used with Cabal in creating and sharing
Haskell packages. A few highlights: web-based, cross-package links in
Haddock docs; syntax coloring via hscolour, with per-project CSS;
links from the Haddock docs to hscolour'd code and to wiki-based user
comment pages. [7]It is available here.
6. http://article.gmane.org/gmane.comp.lang.haskell.general/14891
7. http://haskell.org/haskellwiki/Cabal-make
Vty 3.0.0. Stefan O'Rear [8]announced a new major of [9]vty, featuring
improved performance. vty is notably used in yi to provide a terminal
interface supporting syntax highlighting.
8. http://article.gmane.org/gmane.comp.lang.haskell.general/14876
9. http://members.cox.net/stefanor/vty/dist/doc/html/index.html
Haskell Xcode Plugin. Lyndon Tremblay [10]announced the first release
of [11]a plugin for Xcode enabling Haskell syntax highlighting, Xcode
projects compiling and linking, and a couple missing features, for
Haskell (GHC).
10. http://article.gmane.org/gmane.comp.lang.haskell.general/14875
11. http://www.hoovy.org/HaskellXcodePlugin/
urlcheck 0.1: parallel link checker. Don Stewart [12]announced the
first release of [13]urlcheck, an parallel link checker, written in
Haskell. Frustrated with the resources and time consumed by
'linkchecker', urlcheck is a lightweight, smp-capable replacement in
Haskell. urlcheck pings urls found in the input file, checking they
aren't 404s. It uses Haskell threads to run queries concurrently, and
can transparently utilise multiple cores if you have them.
12. http://article.gmane.org/gmane.comp.lang.haskell.general/14863
13. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/urlcheck-0.1
The Monad.Reader: call for copy. Wouter Swierstra [14]welcomed
articles for the next issue of The Monad.Reader. Submit articles for
the next issue by e-mail before April 13th, 2007. Articles should be
written according to the guidelines available from [15]The Monad
Reader home.
14. http://article.gmane.org/gmane.comp.lang.haskell.general/14870
15. http://www.haskell.org/haskellwiki/TheMonadReader
TV-0.2 and GuiTV-0.2. Conal Elliott [16]announced TV, a library for
composing tangible values ('TVs'), values that carry along external
interfaces. In particular, TVs can be composed to create new TVs, and
they can be directly executed with various kinds of interfaces. Values
and interfaces are combined for direct use, and separable for
composition. GuiTV adds graphical user interfaces to the TV (tangible
value) framework, using Phooey. The functionality was part of TV up to
version 0.1.1, and is now moved out to a new package to eliminate the
dependency of core TV on Phooey and hence on wxHaskell, as the latter
can be difficult to install.
16. http://article.gmane.org/gmane.comp.lang.haskell.general/14862
Haskell-mode 2.2. Stefan Monnier [17]released version 2.2 of [18]the
Haskell-mode package for Emacs. It has very few visible changes,
mostly some commands to query an underlying interactive hugs/ghci in
order to get type/info about specific identifiers.
17. http://article.gmane.org/gmane.comp.lang.haskell.general/14857
18. http://www.iro.umontreal.ca/~monnier/elisp/
