Re: [HACKERS] Size vs size_t - Mailing list pgsql-hackers

From Andres Freund
Subject Re: [HACKERS] Size vs size_t
Date
Msg-id 20170316213955.2hu2fadka5vywdid@alap3.anarazel.de
Whole thread Raw
In response to Re: [HACKERS] Size vs size_t  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: [HACKERS] Size vs size_t  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: [HACKERS] Size vs size_t  (Thomas Munro <thomas.munro@enterprisedb.com>)
List pgsql-hackers
On 2017-03-16 17:24:17 -0400, Tom Lane wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
> > On Thu, Mar 16, 2017 at 5:01 PM, Andres Freund <andres@anarazel.de> wrote:
> >> On 2017-03-16 16:59:29 -0400, Robert Haas wrote:
> >>> I guess I assumed that we wouldn't have defined PG-specific types if
> >>> we wanted to just use the OS-supplied ones.
> 
> >> I think, in this case, defining Size in the first place was a bad call
> >> on behalf of the project.
> 
> The short answer to that is that "Size" predates the universal acceptance
> of size_t.  If we were making these decisions today, or anytime since the
> early 2000s, we'd surely have just gone with size_t.  But it wasn't a
> realistic option in the 90s.

Just out of curiosity I checked when we switched to backing Size with
size_t:
1998 - 0ad5d2a3a886e72b429ea2b84bfcb36c0680f84d


> > Well, I don't think we want to end up with a mix of Size and size_t in
> > related code.  That buys nobody anything.  I'm fine with replacing
> > Size with size_t if they are always equivalent, but there's no sense
> > in having a jumble of styles.
> 
> I'm not in a hurry to do "s/Size/size_t/g" because I'm afraid it'll create
> a lot of merge pain for back-patching, while not actually buying anything
> much concretely.  I think this falls under the same policy we use for many
> other stylistic details, ie make new code look like the code right around
> it.  But I'm fine with entirely-new files standardizing on size_t.

That seems like sane policy.  I'm a bit doubtful that the pain would be
all that bad, but I'm also not wild about trying.

Greetings,

Andres Freund



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