Evaluation order control between two expressions
José Manuel Calderón Trilla
jmct at jmct.cc
Sat Apr 30 20:28:46 UTC 2016
On Sat, Apr 30, 2016 at 6:11 AM, Lennart Augustsson
<lennart at augustsson.net> wrote:
> Order of evaluation can be very important for memory use. So I can imagine
> cases where seq would run out of memory, but pseq would not.
>
That's fair enough. Do you think it's worth attempting to standardize
the behavior of `seq` to be like `pseq`?
> I would argue that pseq is almost always what you want, but seq has a nicer
> denotational semantics.
Is this the reason it wasn't standardized this way to begin with?
Miranda's `seq` is like `pseq` (as was `seq` in other lazy language
implementations) so it's not as if there wasn't precedent.
More information about the Haskell-prime
mailing list