[Haskell-cafe] Can we improve Show instance for non-ascii charcters?

[David Kraeutmann]

You could also use an approach similar to what 'lens' does and write a bit of Template Haskell to generate Unicode-aware Show instances.

On 2/3/2016 10:11 PM, Atze van der Ploeg wrote:
> 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
>
> Travis
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