My Scottish grandmother taught me that these were the same thing. ;-)
-greg w.
On Thu, 2001-11-01 at 20:32, Ashley Yakeley wrote:
GHC User's Guide sec. 6.4
s/Stingier/Thriftier/
'stingy': doesn't give much
'thrifty': doesn't take much
--
Ashley Yakeley, Seattle WA
The [1..] generates [1,1+1,1+1+1,1+1+1+1, ...]
Those thunks all go into the heap. Then last grabs
the last one and evaluates it, so they all go on the
stack. Result death.
The Int instance for Enum is a bit naughty in GHC:
it is strict. That is [bottom..] is bottom rather than
being
Hi!
OK, so the Int instance for Enum is a bit naughty in that [bottom..] is
bottom. But then one can argue that all instances of Enum should be
naughty in this respect.
The argument is as follows and uses the default declaration of enumFrom in
the Enum class (I've added some types with the
Yes, I agree with this, and I'd already snuck it into the
rewrite of the Enum section that I had to do anyhow.
Would you like to read the section (6.3.4) and see if
you think it is better specified now?
Simon
| -Original Message-
| From: Josef Svenningsson [mailto:[EMAIL PROTECTED]]
|
On Fri, 2 Nov 2001, Simon Peyton-Jones wrote:
Yes, I agree with this, and I'd already snuck it into the
rewrite of the Enum section that I had to do anyhow.
Would you like to read the section (6.3.4) and see if
you think it is better specified now?
Yes, it's cool! No objections.
I also
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Yuck. If this isn't enough to convince people that hsc2hs is not
an appropriate tool (at least in the context of the Prelude
and hslibs/), than I don't know what is.
It commits to a particular platform at too early a stage -- details
of C header files are often best left toC source files
So, bringing back the solution of having manually written C wrapper
functions which platform-independent Haskell source files will call
out to, would be preferable (in short, avoid the use of hsc2hs *or
any other extra tool* alltogether). I'm willing to make the
necessary changes.
You
Alastair David Reid [EMAIL PROTECTED] writes:
So, bringing back the solution of having manually written C wrapper
functions which platform-independent Haskell source files will call
out to, would be preferable (in short, avoid the use of hsc2hs *or
any other extra tool* alltogether).
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On Friday 02 November 2001 10:11, Manuel M. T. Chakravarty wrote:
Definitely. An environment like this is pretty trivial todo
in Emacs. In fact, the Emacs Haskell mode does most of that
already anyway.
Well, I use emacs, but didn't really got
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Hi.
Next Semester, I am supposed to teach a short course in Haskell.
Can anyone recommend interesting programming projects which can
be completed in about a month?
I posted this message a while ago and got a few suggestions that
sounded like they would maintain student interest. Alas, my disk
Hi,
I feel embarrased when I post newbie questions after one year
of decent Haskell programming. But it feels much better to ask than to
suffer in ignorance.
My newbie question is: Could anyone explain why the second version of the
following function is better.
Is there a tutorial kind of
At 2001-11-01 22:10, raul sierra alcocer wrote:
What mechanism of transmiting parameters does Haskell implement?
By value.
--
Ashley Yakeley, Seattle WA
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At 2001-11-01 22:10, raul sierra alcocer wrote:
What mechanism of transmiting parameters does Haskell implement?
By value.
Yes, though one might equally say that they are passed by
reference, since in
g = let f x = x+x
z = factorial 1000
in f z * z
the 'first' instance of x
On Friday, 2 November 2001 07:10 Raul Sierra Alcocer wrote:
Hi,
What mechanism of transmiting parameters does Haskell implement?
Thank you,
Raul
Anyway, it does not make sense to distinct between call-by-value and
call-by-reference in the traditional way since variables cannot be modified
Not quite.
A definition is impredicative if it refers to a collection which
contains the object to be defined.
(see http://www.xrefer.com/entry/552390)
If you stratify a type system so that quantifiers only quantify over
things at a lower stratum then (I think) it is predicative (= not
I do agree with you that it woud be better for the Read class
to use a Maybe result rather than a list of parses. But I'm not
sure your problem can be solved simply by making the Char
instance of Read better. The point is that the parser has to read
the *whole* string before it can be sure
Hello,
I've been playing around with GTK+HS recently.
This makes extensive use of Haskell classes, so I
sometimes get strange type errors like this one..
textNew (creates a new text widget) has type:
textNew :: AdjustmentClass adj = Maybe adj - Maybe adj - IO Text
But when I try to create
Hello,
Adrian wrote:
textNew (creates a new text widget) has type:
textNew :: AdjustmentClass adj = Maybe adj - Maybe adj - IO Text
But when I try to create one using:
txt - textNew Nothing Nothing
GHC complains:
Main.hs:82:
Ambiguous type variable(s) `a'
in the
Haskellers!
It's that time of the month. I'm putting out the November release
of the Revised Haskell 98 Report. As ever, I earnestly seek your
feedback. Especially I'd like to know whether I have stumbled
in rewriting the section about Enum in the light of recent email.
Karl-Filip wrote (on 22 Oct):
| What I'm driving at is this: I propose that top level
| bindings shadow imported names and that qualified names can
| not be used to refer to declarations in the same module.
[His message had a lot more in it, of course, but this is the nub.]
There followed a
On Fri, Nov 02, 2001 at 09:30:36AM -0800, Simon Peyton-Jones wrote:
Haskellers!
Hi Simon :-)
It's that time of the month. I'm putting out the November release
of the Revised Haskell 98 Report. As ever, I earnestly seek your
feedback. Especially I'd like to know whether I have stumbled
Fri, 2 Nov 2001 09:30:37 -0800, Simon Peyton-Jones [EMAIL PROTECTED] pisze:
| They are also different in spirit from the rules for
| instance declarations in section 4.3.2 where the binding
| occurrences for the names of the methods must be qualified if
| the unqualified method name is
2 Nov 2001
Announcing HXML, an(other) XML parser for Haskell.
This implementation should have better space behaviour than HaXml's parser,
and may be used as a drop-in replacement in existing HaXml programs.
HXML is available at:
URL: http://www.flightlab.com/~joe/hxml/
The current
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