Proposal: Remove Num superclass of Bits
illissius at gmail.com
Sat Oct 15 12:42:41 CEST 2011
On Sat, Oct 15, 2011 at 12:11 PM, Ian Lynagh <igloo at earth.li> wrote:
> On Sat, Oct 15, 2011 at 11:56:27AM +0200, Bas van Dijk wrote:
>> On 15 October 2011 00:01, Ian Lynagh <igloo at earth.li> wrote:
>> > Removing the Num superclass of Bits was also mentioned, but that would
>> > need its own proposal.
>> Ok, I would like to propose removing the Num superclass of Bits.
> Would we just remove default methods like
> bit i = 1 `shiftL` i
> x `testBit` i = (x .&. bit i) /= 0
You could use DefaultSignatures:
class Bits a where
default bit :: Num a => Int -> a
bit i = 1 `shiftL` i
Does it have to be/stay portable to non-GHC (or older GHC) compilers?
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