Proposal: add new Data.Bits.Bits(bitZero) method
Henning Thielemann
schlepptop at henning-thielemann.de
Sun Feb 16 16:49:23 UTC 2014
Am 16.02.2014 17:42, schrieb Herbert Valerio Riedel:
>> Introduce a new class method
>>
>> class Bits a where
>> ...
>> -- | Value with all bits cleared
>> bitZero :: a
>> ...
>>
>> modulo naming of 'bitZero'
>
> (I'm hesitant to consume "zero" from the namespace as was suggested by Henning)
Let me defend "zero": Functions in the module that contain "Bit" in the
name (clearBit, setBit, testBit) access a single bit. All functions that
access many bits do not contain "Bit" (rotate, shift, xor, popCount). I
propose to import the "zero" function with qualification, as well as the
other functions from the module.
I also propose to provide a default implementation of "zero", like
"clearBit (bit 0) 0". This way, the "zero" method can be introduced
without breaking existing code.
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