[Haskell-cafe] Hugs vs GHC (again) was: Re: Some random newbiequestions

Marcin 'Qrczak' Kowalczyk qrczak at knm.org.pl
Mon Jan 10 19:47:45 EST 2005

Jérémy Bobbio <jeremy.bobbio at etu.upmc.fr> writes:

>> Once this is agreed, it would be easy to make scripts which generate
>> C code from UnicodeData.txt tables from Unicode. I think table-driven
>> predicates and toUpper/toLower should better be implemented in C;
>> Haskell is not good at static constant tables with numbers.
> Sebastien Carlier already wrote this for hOp, see :
> http://etudiants.insia.org/~jbobbio/hOp/Gen_wctype.hs

And I've done a similar thing for my language Kogut some time ago:

Let's see how these separately developed interpretations of predicates differ
(mine also have different names and there are a few more):

        |Sebastien's| mine
  alnum | L* N*     | L* N*
  alpha | L*        | L*
  cntrl | Cc        | Cc Zl Zp
  digit | N*        | Nd
  lower | Ll        | Ll
  punct | P*        | P*
  upper | Lu        | Lt Lu
  blank | Z* \t\n\r | Z*(except U+00A0 U+2007 U+202F) \t\n\v\f\r U+0085

Note that the interpretation of "digit" differs from both C and
Haskell 98 which specify it to be ASCII-only. Actually I have
ASCII-only variants of IsDigit parametrized by the number base.

   __("<         Marcin Kowalczyk
   \__/       qrczak at knm.org.pl
    ^^     http://qrnik.knm.org.pl/~qrczak/

More information about the Haskell-Cafe mailing list