As a recent newbie, I would like to confirm the parent's report. I eventually managed to think of the parentheses, but it did leave me stumped for a while on thursday.
On Sa, 2011-10-15 at 12:49 -0400, David McBride wrote: > This would be a big boon to newbies. When I first started using the > library I would get big errors using $= that were because I didn't > have parenthesis I needed, but didn't realize I needed, despite the > fact that the types seemed to line up. > > On Sat, Oct 15, 2011 at 12:40 PM, Michael Snoyman <[email protected]> wrote: > > On Sat, Oct 15, 2011 at 4:59 PM, John Millikin <[email protected]> wrote: > >> A user recently suggested changing the associativity of ($=) from [[ > >> infixr 0 ]] to [[ infixl 1 ]]. This allows the following expressions > >> to be equivalent: > >> > >> run $ enumerator $$ enumeratee =$ enumeratee =$ iteratee > >> run $ enumerator $= enumeratee $$ enumeratee =$ iteratee > >> run $ enumerator $= enumeratee $= enumeratee $$ iteratee > >> > >> Although this is technically a backward-incompatible change, I feel > >> it's small enough that it could go in a minor release *if nobody > >> depends on the current behavior*. > >> > >> So, if anybody using 'enumerator' will have code broken by this > >> change, please speak up. If I don't hear anything in a week or so, > >> I'll assume it's all clear and will cut the new release. > >> > >> ------------------------- > >> > >> Second, I was asked whether there's a mailing list for enumerator > >> stuff. To my knowledge there isn't, so I started one on librelist. To > >> subscribe and/or post, send an email to > >> [email protected] . Archives are available at > >> http://librelist.com/browser/haskell.enumerator/ . I plan to make > >> release announcements there (for releases not important enough for > >> haskell-cafe), and it might be useful for general discussion. > >> > > > > I'm strongly in favor of this change, the current associativity has > > caused me to litter some code with a few too many parentheses. > > > > Michael > > > > _______________________________________________ > > Haskell-Cafe mailing list > > [email protected] > > http://www.haskell.org/mailman/listinfo/haskell-cafe > > > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
