Re: [PATCH] tag: Use OPT_BOOL instead of OPT_BOOLEAN to allow one action multiple times

Stefan Beller [off-list ref] writes:

Your approach seems more like what we really want, however I'd have
some points:
 * Is it a good idea to have so many different OPT_MODE or
   OPTION_MODE defines? In my attempts I tried to reuse existing
   OPTION_s to not pollute the parsing infrastructure with more
   lines of code. ;)

 * You can only have one OPTION_CMDMODE in one argv vector right?

That is not what I intended, at least.

	int one = 0, two = 0;
	struct option options[] = {
        OPT_CMDMODE('a', NULL, &one, N_("set one to a"), 'a'),
        OPT_CMDMODE('b', NULL, &one, N_("set one to b"), 'b'),
        OPT_CMDMODE('c', NULL, &two, N_("set two to c"), 'c'),
        OPT_CMDMODE('d', NULL, &two, N_("set two to d"), 'd'),
        OPT_END()
        }

should give you two independent sets of modes, one and two.

The only reason I needed to add an extra parameter to get_value()
was so that I can tell the former two and the latter two belong to
different groups, and that is done by looking at the address of the
variable.  In opt_command_mode_error(), opt->value == that->value
is used as a condition to see if the other option is possibly the
one that was used previously, which conflicted with us.