efficiency

[Marcin 'Qrczak' Kowalczyk]

Tue, 15 Jan 2002 13:06:58 +0100, Rijk-Jan van Haaften <rjchaaft@cs.uu.nl> pisze:

> This feature is one I consider among the worst in Haskell. If
> a datatype with just a single constructor can be optimized away,

It can't. newtype has a different semantics than data, as others
explained. It would be weird if data had non-uniform semantics for
the one-constructor-with-one-field case, even though usually newtype
is the variant we prefer.

-- 
 __("<  Marcin Kowalczyk * qrczak@knm.org.pl http://qrczak.ids.net.pl/
 \__/
  ^^
QRCZAK