On Mon, Aug 3, 2015 at 12:45 PM, Daniel Bergey <[email protected]> wrote:
> 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 [email protected] [email protected] unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
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