Here is a harmless little program (no recursion, no data types)
which GHC doesn't manage to compile (well, the kernel kills GHC
after a while on a machine with generous 512MB of main memory
and 1GB of swap space).
begin next = next id
leaf k i next = next (k i)
fork k next = next (\ t u - k (t
I bet it's massive types. Translate the program into system F and see.
(I remember this came up when looking at Okasaki's sequences of code
combinators.)
Your bet is most likely the correct one (yes, I peeked at Chris' HW2002 paper).
GHC doesn't try to hash-cons types, because it usually
| GHC doesn't try to hash-cons types, because it usually doesn't
matter,
| but I bet it does here.
|
| Would this be a major rewrite? [As an aside, a similiar problem showed
up
| when generating conversion functions for generic representation
types.]
I really don't know. Hash-consing is
As far as I know, Hugs doesn't hash-cons types, yet it manages to
typecheck these pathalogical examples in reasonable time/space. I
vaguely recall there being a specific modification to Hugs's typechecker
to handle this, but I can't remember what it was.
Cheers,
Simon
-Original
GHCi infers for
fac 0 = 1
fac (n + 1) = (n + 1) * fac n
the following type
/ _ \ /\ /\/ __(_)
/ /_\// /_/ / / | | GHC Interactive, version 5.04.2, for Haskell 98.
/ /_\\/ __ / /___| | http://www.haskell.org/ghc/
\/\/ /_/\/|_|
I'm not sure it's the type inference so much as the type abstractions
and applications. But yes, your point is a good one
S
| -Original Message-
| From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
| Behalf Of Simon Marlow
| Sent: 28 May 2003 18:03
| To: Simon Peyton-Jones; Ralf Hinze
I'd like to remove greencard from the list of projects that
can get built if
you 'make' in fptools.
I see a list AllProjects which include 'green-card' in
fptools/mk/config.mk.in
Is this the bit I need to edit?
It looks plausible but I'm not certain.
Yes, that should work. Why
On Thursday 29 May 2003 12:48 am, Mike Thomas wrote:
1. That Greencard and HDirect have been lagging behind the mainstream of
GHC library changes for some time now - it has been hard to get them in
step through the major FFI and library changes because few people have the
time and/or
