26 Aug
2006
26 Aug
'06
7:47 p.m.
On Sat, Aug 26, 2006 at 10:15:17PM +0300, Misha Aizatulin wrote:
Neil Mitchell wrote:
*Main> show $ A `And` A "A And A"
For me, using GHCi 6.4.2 + Windows, I get: "A `And` A"
I installed GHC 6.4.2 now (on Linux). It really does print "A `And` A", but still doesn't read it. Would you agree that GHC doesn't conform to the Haskell Report here? In fact it seems to produce a Read instance with no valid input for it!
ghci on 6.4.2 Linux works for me: *Main> show (A `And` A) "A `And` A" *Main> read (show (A `And` A)) :: T A `And` A (recent 6.5 also seems fine). Thanks Ian