Re: [RFC PATCH 0/2] Allow detached forms (--option arg) for git log options.

> you cannot take the address of a bit portably in C, so you can't let
> parseopt set/clear bits through bitfields (as in unsigned field : 1 in a
> struct in C I mean).
> 
> So to use parseopt OPTION_BIT feature, you have to convert them to C
> flags as in "unsigned flags" and explicit masks defines/enums.
> 
> IOW:
> 
>     struct foo {
>        unsigned bar : 1,
> 		...
> 		  baz : 1;
>     };
> 
> Must be converted into:
> 
>     struct foo {
>     #define FOO_FLAG_BAR (1U <<  1)
>     ...
>     #define FOO_FLAG_BAZ (1U << 18)
>       unsigned flags;
>     }
> 
> so that you can use parseopt.  that's what I meant.
> 
> 
> This was done for the rev-list parsing stuff e.g.