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List: haskell-cafe
Subject: Re: efficiency
From: "Marcin 'Qrczak' Kowalczyk" <qrczak () knm ! org ! pl>
Date: 2002-01-16 21:17:29
Message-ID: slrna4brf9.r8h.qrczak () qrnik ! zagroda
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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
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