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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.lang.c
Subject: Re: What is the rank of size_t ?
Date: Wed, 03 Jun 2020 11:16:08 -0700
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Ike Naar <ike@otaku.sdf.org> writes:

> On 2020-06-01, Tim Rentsch <tr.17687@z991.linuxsc.com> wrote:
>
>> Well that explains at least some of it.  What do you get if
>> you run this:
>>
>>     #include <stdio.h>
>>     #include <stdint.h>
>>
>>     int
>>     main(){
>>         printf( "INTMAX_MAX is %td\n", INTMAX_MAX );
>
> Why use %td (which applies to an argument of type ptrdiff_t),
> instead of %jd (which applies to an argument of type intmax_t)?

Because

  (1) I don't use either often enough to remember which is
      which, and I confused the two;

  (2) I didn't bother (even though I usually do, I didn't
      this time) to check the Standard to be sure;  and

  (3) I got a false positive from gcc as a result of
      intmax_t and ptrdiff_t having the same underlying
      type, so test compiling the program didn't give a
      -Wformat diagnostic.