On 11-May-1998, Simon L Peyton Jones [EMAIL PROTECTED] wrote:
Since GHC keeps the types right through the compiler, it
really can't do CSE on two terms of type
Either Int Int
Either Bool Int
even if they are both applications of Right.
Actually, GHC does finally discard
Greencard allows Haskell to call C (or Corba). Is there a way to give C
code access to Haskell functions?
GHC does not yet allow this, but we are working hard on H/Direct,
a successor to Greencard, that will. It'll also allow you to
seal up Haskell programs inside COM objects. Timescale: a
Hello,
Thanks to everybody who replied on this thread. I'm afraid I've got
to go away for a couple of weeks, so I can't join in any more :-(
Here are my views on the most recent postings...
On Mon 11 May, Jon Mountjoy wrote:
--
I would guess 'sometimes'. In
On 12-May-1998, Frank A. Christoph [EMAIL PROTECTED] wrote:
With regard to merging Either instances, I agree with Simon that for most
programs this will not buy you much, but there are two common kinds of
programs where one could expect a significant effect on performance, just
because of
Alex asked:
Greencard allows Haskell to call C (or Corba). Is there a way to give C
code access to Haskell functions?
Simon writes:
GHC does not yet allow this, but we are working hard on H/Direct,
a successor to Greencard, that will. It'll also allow you to
seal up Haskell programs
On Tue, 12 May 1998, Koen Claessen wrote:
Frank A. Christoph wrote:
| With regard to merging Either instances, I agree with Simon that for most
| programs this will not buy you much, but there are two common kinds of
| programs where one could expect a significant effect on performance,
--
THIRD INTERNATIONAL SUMMER SCHOOL ON
A D V A N C E D F U N C T I O N A L P R O G R A M M I N G
--
Hello, this is about a change in the prelude I'd like to suggest.
The following is obviously not what one would expect:
Prelude succ 100::Integer
Program error: {primIntegerToInt 100}
However, with the prelude defining succ to be
succ,:: Enum a = a - a
On Tue, 12 May 1998, Mariano Suarez Alvarez wrote:
| On Tue, 12 May 1998, Koen Claessen wrote:
|
|map :: (a - b) - [a] - [b]
|map f (x:xs) = f x : map f xs
|map f xs = xs
|
| Where is the CSE in theis def of map? Why is it naive? (Hugs ghc define
| map on lists exactly
Christian Sievers wrote:
Hello, this is about a change in the prelude I'd like to suggest.
The following is obviously not what one would expect:
Prelude succ 100::Integer
Program error: {primIntegerToInt 100}
However, with the prelude defining succ to be
succ,
rigid and I belong to the small legion of amateurs who implemented their
own math. domain system, Rings, Fields, Modules, etc. This apparently
has no chance to be included into the Haskell standard, nobody cares.
Standards develop because people who care about particular aspects
of them push
On 12 May, Jeffrey R. Lewis wrote:
I agree, in fact, I'd go one stronger. I'll propose that `fromEnum' and
`toEnum' be taken out, since clearly not all enumerable types are
subtypes of Int (as you point out, Integer leaps immediately to mind).
An alternative would be to return fromEnum and
On Tue 12 May, Frank A. Christoph wrote:
I'm experiencing a little bout of deja vu here, so excuse me if it turns out
that I'm repeating myself. (I could swear I already posted this, but it's
not in my "Messages Sent" folder...)
With regard to merging Either instances, I agree with Simon
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