bit array

Tomas Lindquist Olsen tomas at
Wed Feb 7 08:47:22 PST 2007

Frits van Bommel wrote:

> Orgoton wrote:
>> When I declare
>> bit flags[120];
>> How much memory does this consure? 120 Bytes or 120 bits (packing).
>> It would be a pain to make something like "long flags1, flags2..." and
>> "if (flags1 & FLAGMASK) ..." to conserve memory.
> It used to only consume 120 bits, when 'bit' was still a basic type.
> There were some issues with that though, so now 'bit' is just a
> backwards-compatibility alias to 'bool'. Since 'bool' is a 1-byte type
> (typically) that means it'll consume 120 bytes.

As a note to this you can use std.BitArray in phobos to have a true bit
Not sure what the Tango equivalent is.

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