Re: Change definitions of bitmap flags to bit-shifting style - Mailing list pgsql-hackers

Peter Eisentraut <peter.eisentraut@enterprisedb.com> writes:
> The attached patch changes definitions like
>      #define FOO 0x01
>      #define BAR 0x02
> to
>      #define FOO (1 << 0)
>      #define BAR (1 << 1)
> etc.

> Both styles are currently in use, but the latter style seems more 
> readable and easier to update.

FWIW, personally I'd vote for doing the exact opposite.  When you are
debugging and examining the contents of a bitmask variable, it's easier to
correlate a value like "0x03" with definitions made in the former style.
Or at least I think so; maybe others see it differently.

            regards, tom lane