Re: [PATCH] refs.c: use skip_prefix() in prettify_refname()

> Jeff King <peff@peff.net> writes:
>
>> On Thu, Mar 23, 2017 at 08:18:26PM +0100, René Scharfe wrote:
>>
>>> Am 23.03.2017 um 16:50 schrieb SZEDER Gábor:
>>>> This eliminates three magic numbers.
>>>>
>>>> Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
>>>> ---
>>>>  refs.c | 10 +++++-----
>>>>  1 file changed, 5 insertions(+), 5 deletions(-)
>>>>
>>>> diff --git a/refs.c b/refs.c
>>>> index e7606716d..0272e332c 100644
>>>> --- a/refs.c
>>>> +++ b/refs.c
>>>> @@ -366,11 +366,11 @@ int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data)
>>>>
>>>>  const char *prettify_refname(const char *name)
>>>>  {
>>>> -	return name + (
>>>> -		starts_with(name, "refs/heads/") ? 11 :
>>>> -		starts_with(name, "refs/tags/") ? 10 :
>>>> -		starts_with(name, "refs/remotes/") ? 13 :
>>>> -		0);
>>>> +	if (skip_prefix(name, "refs/heads/", &name) ||
>>>> +	    skip_prefix(name, "refs/tags/", &name) ||
>>>> +	    skip_prefix(name, "refs/remotes/", &name))
>>>> +		; /* nothing */
>>>> +	return name;
>>>
>>> Nice, but why add the "if" when it's doing nothing?
>>
>> It's short-circuiting in the conditional.
>
> I think René meant this:
>
>      /* just for side effects */
>      skip_prefix(name, "refs/heads/", &name) ||
>      skip_prefix(name, "refs/tags/", &name) ||
>      skip_prefix(name, "refs/remotes/", &name);
>
>      return name;
>
> which still short-sircuits, even though I do think it looks
> strange; "correct but strange".