On Tue, Mar 20, 2012 at 2:24 AM, Stephen Tetley
stephen.tet...@gmail.com wrote:
A quick suggestion - does setting the ribbon_frac to something like
0.8 improve things?
Nope. The ribbon (IMO both an undescriptive name and underdocumented)
only constraints the number of non-indent characters per
On Tue, Mar 20, 2012 at 6:52 AM, Stephen Tetley
stephen.tet...@gmail.com wrote:
Hi Ivan
I haven't found any bugs in WL, however I do find the API somewhat
confusing regarding line breaking (I would need to consult the manual
to tell you the difference between linebreak, softline etc.). This
I just uploaded a new version to hackage. This improves the
heuristics for guessing the right module quite a bit, and adds a local
config file where you can prioritize or de-prioritize packages or
module prefixes. It's also a bit faster.
From the hackage description:
A small standalone program
A while back I was complaining about the profusion of poorly
documented tags generators. Well, there is still a profusion of
poorly documented tags generators... I was able to find 5 of them.
So, that said, here's my contribution to the problem: fast-tags,
haskell tag generator #6.
Why not use
On Sat, Mar 31, 2012 at 5:11 PM, dag.odenh...@gmail.com
dag.odenh...@gmail.com wrote:
On 1 April 2012 00:23, Evan Laforge qdun...@gmail.com wrote:
So, that said, here's my contribution to the problem: fast-tags,
haskell tag generator #6.
I like that it doesn't give duplicate entries for type
* haskell-src-exts is not slow. It can parse a 769 module codebase racking up
to 100k lines of code in just over a second on my machine. That's
good. Also, I don't think speed of the individual file matters, for
reasons I state below.
Wow, that's faster than my machine.
* Broken source
On Sun, Apr 1, 2012 at 3:27 AM, Roman Cheplyaka r...@ro-che.info wrote:
It's useful to mention the limitations of this package, so that people
know what to expect and don't spend their time testing it to understand
that it doesn't suit their needs.
Good point, I'll put the limitations and TODO
On Mon, Apr 2, 2012 at 5:41 AM, Michael Snoyman mich...@snoyman.com wrote:
On Mon, Apr 2, 2012 at 3:38 PM, Alp Mestanogullari alpmes...@gmail.com
wrote:
Lesson learned: for next year, write a Haskell program that tells if a given
-cafe thread or reddit discussion is a April Fool's joke or
I recently uploaded fast-tags-0.0.3. The main thing is that all the
performance problems I was able to find have been fixed---hopefully
will no longer be mistaken as an April Fools joke! Here's copy and
paste from the hackage description:
Changes since 0.0.2:
Lots of speed ups, especially when
I love the idea of easier to use FFI, but isn't the haskell FFI
intentionally very low level, and intended to be used with tools?
In that light, maybe it would be easier to extend hsc2hs with fancier
macros and the ability to generate wrappers to directly call C++
methods and construct C++
On Thu, Apr 12, 2012 at 6:22 PM, Antoine Latter aslat...@gmail.com wrote:
Hi Warren,
On Thu, Apr 12, 2012 at 6:31 PM, Warren Harris warrensomeb...@gmail.com
wrote:
I wrote a parsec parser that does symbols lookups during the parsing process
(ParsecT String Store IO a). Now I'd like to
I use a custom Pretty class along with HughesPJ, ala ghc's Outputable.
It means I can omit data or print it out in a more readable form
(even just rounding floats to %.03f can help a lot), and also get nice
layout and wrapping. The downside is a certain amount of boilerplate
to write output
And then have the compiler automatically include (optional) package
name, module name, and line number where `headContext` was called. How
about we borrow a bit from rewrite rules, and have a pragma such as:
{-# WITH_CONTEXT head headContext #-}
This seems similar to the SRCLOC_ANNOTATE
On Thu, Apr 26, 2012 at 12:20 AM, Simon Peyton-Jones
simo...@microsoft.com wrote:
Tristan Allwood got quite a long way with this a couple of years ago.
http://research.microsoft.com/en-us/um/people/simonpj/papers/stack-trace/DebugTraces.pdf
While stack traces are undoubtably useful, I think
So I wanted to find the first index in a vector whose running sum is
greater than a given number.
The straightforward way is to create the running sum and then search:
Vector.findIndex (=target) (Vector.scanl' (+) 0 vector)
But vectors are strict so it could do extra work, and what if I don't
, 2012 12:35 AM, Evan Laforge qdun...@gmail.com wrote:
So I wanted to find the first index in a vector whose running sum is
greater than a given number.
The straightforward way is to create the running sum and then search:
Vector.findIndex (=target) (Vector.scanl' (+) 0 vector)
But vectors
On Tue, May 29, 2012 at 12:52 PM, Roman Leshchinskiy r...@cse.unsw.edu.au
wrote:
On 29/05/2012, at 19:49, Evan Laforge wrote:
Good question.. I copied both to a file and tried ghc-core, but it
inlines big chunks of Data.Vector and I can't read it very well, but
it looks like the answer
On Mon, Jun 11, 2012 at 1:29 PM, Roman Leshchinskiy r...@cse.unsw.edu.au
wrote:
Hmm, which version of GHC and what compiler flags are you using? I'm not
familiar with ghc-core, maybe that's doing something wrong. Just run ghc -O2
-ddump-simpl and look at the output. Below is the code I'm
he recent discussion of whether storablevector should be deprecated in
favor of vector reminded me: vector supports storable arrays, but it
doesn't support lazy arrays. While storablevector has lazy arrays and
a builder, it doesn't support boxed types (it would be become misnamed
if it did!).
So
I can think of two cases where I'd want something like this.
One is manipulating file extensions, where I'd want to use
System.FilePath.splitExtension or something like that anyway.
The other is suffix stripping for text processing, where I'd
want to use a trie to match a whole lot of
On Thu, Aug 2, 2012 at 9:00 AM, Jonathan Geddes
geddes.jonat...@gmail.com wrote:
Richard O'Keefe Said:
Ouch! And that's not even very deeply nested.
Imagine 4 or 5 levels deep. It really makes
Haskell feel clunky next to `a.b.c.d = val`
that you see in other languages.
I was taught that
On Sun, Aug 12, 2012 at 6:18 PM, Niklas Hambüchen m...@nh2.me wrote:
I just came across the fact that running
createProcess (proc asdfasdf [])
with non-existing command asdfasdf returns perfectly fine handles.
I would expect an exception.
You can even hGetContents on stdout: You just
On Tue, Sep 11, 2012 at 9:36 AM, Eric Velten de Melo
ericvm...@gmail.com wrote:
Any thoughts? Hopefully I'm not saying anything really stupid.
You can intersperse decoding errors in the output, e.g. output is
[Either Error DecodedChunk]. Then all the processors have to deal
with it, but if you
With shake I'm not sure exactly how to get started. Should I have a
separate project where I create the build system for the webapp? Or
can I setup something similar to sbt?
Also, how do I handle dependencies with shake? cabal will pull in
packages from hackage and do the needful, is
I wonder if people who like one giant window maybe don't use the REPL?
I keep 3 windows open: one with the editor, one with ghci, and one
with a shell. The shell I use for compiles, darcs records, diffs,
grepping, moving files around, etc. I don't understand how people are
able work with
Ever since upgrading to 7.6.1 I regularly get panics like this:
seq: internal error: evacuate: strange closure type -1958168540
(GHC version 7.6.1 for x86_64_apple_darwin)
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
I've seen some variations, but basically I
Thanks for the response.
On Sat, Dec 1, 2012 at 5:23 PM, Alexander Kjeldaas
alexander.kjeld...@gmail.com wrote:
What I've mostly done in similar circumstances (jni)
1. Create an interface (virtual functions or template) for the FFI in C++
that covers everything you use. Then create one test
Shelly is cool, as I said, but I imagine it would be more valuable to
have another language that is actually separate from Haskell, with an
interpreter that is more lightweight and changes much less frequently
(than GHC). Something that could be nearly as portable as Bash or Perl.
Hugs? It
It so happens that on 64 bit OS X, haskell's Int is 64 bits, while C's int is
32 bits. hsc2hs's #poke does no typechecking at all, so if you have
(#poke Struct, int_field) structp int -- where int :: Int
Then you probably are going to corrupt memory, and in a particularly
pernicious way (since
surprisingly, deepseq is not used as much as I thought.
http://packdeps.haskellers.com/reverse/deepseq lists a lot of packages,
but (after grepping through some of the code) most just define NFData
instances and/or use it in tests, but rarely in the „real“ code. For
some reason I expected it
Today I thought it was about time to simplify how new 'things' of a certain
kind are added to the system. These things are some a cross between an event
and an assertion of a fact in a rule based system. There are many different
kinds of these things. I already have more than a dozen
I also get stack overflows from HughesPJ if I format something too big.
LW is more efficient by construction than HughesPJ. The only reason I
switched to HPJ from LW is that I could never get LW to behave as I
wanted, but I'll probably wind up writing my own simpler formatter due
to the HPJ
I have a couple of problems with attoparsec which I think are related
to its always backtrack nature, but maybe there's some other way to
solve the same problems.
The first is that it's hard to get the right error msg out. For
instance, I have a parser that tries to parse a number with an
I think the mistake here is to parse something and then decide if
its it valid. It should be the parser which decides whether its
valid. So rather than:
suffix - A.option ((:) $ A.letter_ascii)
try:
typ - A.choice [ {- list or valid suffix parsers -} ]
return $
On Fri, Mar 15, 2013 at 8:49 PM, Niklas Hambüchen m...@nh2.me wrote:
Is it not possible to add an alternative (no pun intended) to | that
supports the semantics Evan wants?
I assume it's the performance thing. Presumably it would need to pass
an extra flag with to the failure continuation to
Brent, my use case is not particularly complicated. I am trying to model the
pdf spec - which says that pdf contains Objects that could of of types
Number, String, Name, Array and Dictionary - while array is list of objects,
the Disctionary is a list of tuples (Name, Object) not (Object,
Can't we just add some features to haddock? There are a lot of ways
to improve haddock a lot, and no one is doing them, so my impression
is that haddock doesn't really have active maintainers. Adding a
whole new backend seems risky, unless it results in new maintainers
joining.
For my personal
On Mon, Apr 8, 2013 at 3:49 PM, Ivan Lazar Miljenovic
ivan.miljeno...@gmail.com wrote:
On 9 April 2013 05:08, MigMit miguelim...@yandex.ru wrote:
Отправлено с iPad
08.04.2013, в 21:44, Evan Laforge qdun...@gmail.com написал(а):
Can't we just add some features to haddock?
No, we can't
I tried to colorize a haskeline prompt by putting control characters
in it, but line editing was hopelessly confused, presumably because
haskeline doesn't understand control characters and thought the prompt
was longer than it really was. From looking at
Haskeline.promptedInput, it seems like
I've had a strange bug that's baffled me for a long time. I finally
got serious about tracking it down, and managed to reduce it to a
small program that exhibits the unexpected behaviour, namely that a
createProcess seems to block writing to and closing a socket.
Here's the example program:
---
On Sun, Apr 21, 2013 at 9:25 PM, Donn Cave d...@avvanta.com wrote:
Quoth Evan Laforge qdun...@gmail.com,
sleep = Process.createProcess (Process.proc sleep [5])
sleep = Process.createProcess
((Process.proc sleep [5]) {Process.close_fds = True})
- Because the client uses buffered I
On Mon, Apr 22, 2013 at 7:39 PM, Donn Cave d...@avvanta.com wrote:
quoth Evan Laforge qdun...@gmail.com,
...
Oh I see, because the subprocess inherits the socket connection. That
makes sense, though it's tricky. Tricky tricky unix. Why does fork()
have to be so complicated?
Well, it's
I wrote a ghc-server that starts a persistent process for each cpu.
Then a 'ghc' frontend wrapper sticks each job in a queue. It seemed
to be working, but timing tests didn't reveal any speed-up. Then I
got a faster computer and lost motivation. I didn't investigate very
deeply why it didn't
Yes, it would break code. Probably a lot of code.
So of course I volunteer to fix my code, but that's not much help,
since it's a small minority of the code on hackage. So that made me
think, maybe we should organize a kind of hackage community service
brigade, which, when the time is right,
You're overthinking it. I just sent a whole screen.
On Sat, Jun 22, 2013 at 7:25 PM, Brandon Allbery allber...@gmail.com wrote:
On Sat, Jun 22, 2013 at 9:49 PM, Michael Orlitzky mich...@orlitzky.com
wrote:
On 06/22/2013 01:28 PM, Mark Lentczner wrote:
3) Do not resize the terminal window
Inconsolata and Consolas?
My bet:
- Bitstream Vera Sans Mono
- DejaVu Sans Mono
- Inconsolata
- Whatever the default terminal font is on OS X
A bit of a tangent, but a while back I tried a bunch of those
recommended programmer fonts, and I didn't like any of them better
than the default
This is neat, it sounds like I could use this with fix-imports to find
only modules that export the right function name, or even to add
non-qualified imports. But since it's already 95% good enough for my
use case, I probably won't get around to it any time soon.
On Thu, Jun 20, 2013 at 8:13 AM,
/haskell-suite/halberd
On Tue, Jun 25, 2013 at 6:30 AM, Evan Laforge qdun...@gmail.com wrote:
This is neat, it sounds like I could use this with fix-imports to find
only modules that export the right function name, or even to add
non-qualified imports. But since it's already 95% good enough for my
So haddock ignores {-# LANGUAGE CPP #-}, which makes it crash on any
file that uses it. But if you pass --optghc=-cpp, it runs CPP on
everything, which makes it crash on any file that uses string gaps, or
happens to contain a /*. /* is rare and easily fixed, but not string
gaps.
It looks like a
` or calling haddock manually?
Cheers,
On Fri, Jul 12, 2013 at 3:25 PM, Evan Laforge qdun...@gmail.com wrote:
So haddock ignores {-# LANGUAGE CPP #-}, which makes it crash on any
file that uses it. But if you pass --optghc=-cpp, it runs CPP on
everything, which makes it crash on any file that uses
If you have an .hs file with {-# LANGUAGE CPP #-}, it is a compiler's
job to detect it and run the preprocessor.
But haddock uses the GHC API (which knows how to do the above), so there
shouldn't be issues with that.
Hey, you're right! Haddock *does* understand LANGUAGE CPP. Ok, that
makes
On Tue, Jul 16, 2013 at 5:20 PM, Richard A. O'Keefe o...@cs.otago.ac.nz wrote:
Brian Marick sent me a couple of his stickers.
The one I have on my door reads to be less wrong than yesterday.
The other one I keep free to bring out and wave around:
An example would be handy about now.
Occasionally I have to explicitly add a type annotation, either for
clarity or to help choose a typeclass instance. Usually top-level
type annotations take care of this, but sometimes it's convenient to
only annotate a certain value, e.g. one argument of a lambda.
I've noticed that while vanilla
but Integer is actually (if you're using GMP with your ghc):
Yes, that's tolerably well known. You only pay the space overhead
when you need it (like Lisp or Smalltalk). But you always pay the
time overhead.
I thought Integers can't be unboxed, regardless of their magnitude?
[ This is the second time I sent this, the first time it said it was
awaiting moderation because I'm not subscribed to haskell-cafe, which
is weird because I thought I was. Did a bunch of people get
unsubscribed? ]
I'm sure this is old-hat to typeclass wizards, but I've managed to get
pretty far
On Mon, Sep 16, 2013 at 4:09 PM, Wvv vite...@rambler.ru wrote:
I suggest to add instead of (or with) export section Pragma EXPORT:
I doubt this has much chance, since haskell already made its choice
here a long time ago (and even if it were still up for discussion,
PRAGMA isn't right for it),
It also makes actual definitions cleaner/shorter rather than
cluttering them with extra annotations (either PRAGMAs or
public/private markers), though this is not that big of a deal.
It's true, though you could get it pretty short, e.g. default private
and leading ! for public. Go uses
Thanks to everyone who replied, indeed it looks like GADTs do what I
claimed I wanted. That's neat because I've never been able to think of
a use for them. However:
On Sun, Sep 15, 2013 at 2:16 AM, o...@okmij.org wrote:
Why not to introduce several type classes, even a type class for each
I saw the the video on g+, it's especially nice with live
instruments. I noticed the code had a fair amount of stuff dealing
with limitations of the auto-bass, I assume you had to be careful not
to gum up its works. Is there a robotic drumset back there somewhere
too?
Also change ringing is new
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