I think we can all agree these characters should be shown. Maybe a GHC bug report is a good idea? On 02/03/2016 10:37 AM, Takayuki Muranushi wrote:
I think one of the solution is to import and call u_iswprint from GHC.Show, too, but I don't know it's against any design choices.
+1 for only escaping non-printable characters.
Yesterday, I had a chance to teach Haskell (in Japanese,) and I had to use English in some of the most exciting examples, like the Applicative List example above. I would heartedly like to see GHC improve in these directions, so that we can make more happy learning materials on Haskell.
As a workaround, perhaps you can avoid using print/show with core data structures. Using your applicative example:
mapM_ putStrLn $ [(++"の父"), (++"の母")] <*> ["田中", "山田"] 田中の父 山田の父 田中の母 山田の母
For other data structures, you can write your own Show instance: data Name = Name String String instance Show Name where show (Name family given) = family ++ given
print $ Person "山田" "太郎" 山田太郎
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