3 Aug
2015
3 Aug
'15
4:47 p.m.
On Mon, Aug 3, 2015 at 12:45 PM, Daniel Bergey
I thought GHC would infer the type when only one instance is in scope, at least in some cases, like IsString. But I could well be wrong about that.
Typeclasses are open-world; this is not a safe assumption, since instances are global and an instance added elsewhere at some point in the future could therefore break your program. -- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net