From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 02 Oct 2019 07:04:38 GMT
Subject: Re: [PATCH v2 1/6] midx: add MIDX_PROGRESS flag <snip>
Message-ID: <xmqqlfu3eigp.fsf@gitster-ct.c.googlers.com>
In-Reply-To: <xmqqsgobg0rv.fsf@gitster-ct.c.googlers.com>

Junio C Hamano <gitster@pobox.com> writes:

> William Baker <williamtbakeremail@gmail.com> writes:
>
>> Although my debugger might not be the smartest, I haven't noticed any
>> downsides to switching this to an enum.
>
> Well, if you write
>
> 	enum { BIT_0 = 1, BIT_1 = 2, BIT_3 = 4 } var;
>
> it's pretty much a promise that the normal value for the var is one
> of these listed values to your readers.

... that is why compilers give a warning when you write

	switch (var) {
	case ...:
	...
	}

and do not have case arms for all the declared enum values without
having the 'default' arm.