RE: [Nit] Lots of enumerated type warnings

On January 22, 2018 6:44 PM, Junio C Hamano wrote:

"Randall S. Becker" [off-list ref] writes:

quoted

Here are a few examples, there are more:

auto_crlf = git_config_bool(var, value);
  		          ^

The carets in your message do not align to what I think they are trying to
point at, but I think the above is pointing at the '=' and wants to say
"auto_crlf variable is enum, it gets assigned an integer returned from
git_config_bool(), and I do not like that assignment".

For this one I tend to agree with the compiler, meaning that it is ugly to
define "enum auto_crlf" in such a way that the first two values happen to
match what a logically different "enum" (which is
"boolean") assigns the two values to.  And this judgment does not change
whether git_config_bool() actually returns an enum or an int (the code in
reality returns the latter).

I do not think people would terribly mind a patch to turn the above
into:

  auto_crlf = git_config_bool(var, value) ? AUTO_CRLF_FALSE :
AUTO_CRLF_TRUE;

quoted

"/home/jenkins/.jenkins/workspace/Build_Git/config.c", line 1147:
warning(272):
          enumerated type mixed with another type

type = sha1_object_info(s->oid.hash, &s->size);
  			     ^

/* returns enum object_type or negative */ int sha1_object_info(const
unsigned char *sha1, unsigned long *sizep)

The function has been like this forever, I suspect, and I would say "this

gives

negative when error, or enum we know is non-negative" is quite a
reasonable thing to do, but the enum has OBJ_BAD defined to be negative,
so probably it is more kosher if sha1_object_info() is declared to return
"enum object_type" instead of int.

quoted

"/home/jenkins/.jenkins/workspace/Build_Git/diff.c", line 3618:
warning(272):
          enumerated type mixed with another type

options->color_moved = diff_color_moved_default;
  	                     ^

If color_moved field is declared to be an enum, the _default variable

should

be, too.  I do not think it is such a controversial fix.

The basic idea of the request is whether to slowly take on this type of
change. It will likely take a bit of time, but I really don't like warnings,
so am willing to work on it. There are loads more like this that might need
discussion, so I'll be pretty conservative on this effort.

Cheers,
Randall