More problems with .hi files

1999-05-27 Thread George Russell
Well I've updated GHC yet again to solve the last problem, but it's made things even worse, because GHC has now forgotten an instance declaration which it remembered before. Specifically file Interaction.hs contains the line: instance Event IA where (etc) Interaction.hi contains the line:

`sum' in ghc-4.02

1999-05-27 Thread S.D.Mechveliani
To my ghc-4.02 treats sum strangely. In the below program, sum xs needs small, constant size stack, sm xs needs stack proportional to length xs. And sm is the implementation of sum shown in src/.../PrelList.lhs I apply ghc -c -O. [..] Simon Peyton-Jones [EMAIL PROTECTED]

Portability dreams

1999-05-27 Thread Sven Panne
Using Haskell programs and libraries with different compilers and/or interpreters (or even with different versions of the same system!) is currently quite a frustrating experience. This is can be attributed to the following problems: * Different language versions (1.3, 1.4, 98, ...) exist.

RE: Randoms, arrays, monads etc.

1999-05-27 Thread Mark P Jones
It wasn't your main question, but I'd like to respond to one point that you raised: | (Works with ghc. Doesn't work with Hugs because of incompatible Random | module (?).) The Haskell 98 Random library changed quite significantly, and we didn't get to do anything about it before the last

Randoms, arrays, monads etc.

1999-05-27 Thread Marcin 'Qrczak' Kowalczyk
I tried to haskellize an algorithm which poorly fits into the functional style: plasma fractal generation. It computes a rectangular array in a funny order, using previously computed elements, and uses random numbers all the time. It works (I didn't check if the result is correct but it's not

RE: `sum' in ghc-4.02

1999-05-27 Thread Simon Peyton-Jones
foldl looks like this: foldl k z [] = z foldl k z (x:xs) = foldl k (z `k` x) xs To work in constant space, foldl needs to evaluate its second argument before the call, rather than building a thunk that is later forced (which in turn builds stack). But in general, foldl is not strict in z.

`sum' in ghc-4.02

1999-05-27 Thread S.D.Mechveliani
To my ghc-4.02 treats sum strangely. In the below program, sum xs needs small, constant size stack, sm xs needs stack proportional to length xs. And sm is the implementation of sum shown in src/.../PrelList.lhs I apply ghc -c -O. [..] Simon Peyton-Jones [EMAIL PROTECTED]

`sum' in ghc-4.02

1999-05-27 Thread S.D.Mechveliani
ghc-4.02 treats sum strangely. In the below program, sum xs needs small, constant size stack, sm xs needs stack proportional to length xs. And sm is the implementation of sum shown in src/.../PrelList.lhs I apply ghc -c -O. What keys are needed to code sum like it is in this