Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.std.c > #6264

Re: Adjacent string literals

Show all headers | View raw

James Kuyper <jameskuyper@alumni.caltech.edu> writes:

> I learned a couple of decades ago that adjacent string literals get
> concatenated into a single longer literal, even if separated by
> arbitrarily large amounts of white-space.
>
> Yesterday I happened to notice that translation phase 6 says only that
> "Adjacent string literal tokens are concatenated.", without saying
> anything about white-space.  White-space doesn't lose it's significance
> until translation phase 7.  Therefore, string literals that are separated
> by white-space do not qualify as adjacent.  There's also no mention of
> white-space in the fuller discussion that occurs in 6.4.5p5.
>
> Am I missing something obvious here?  I can imagine someone telling me
> that "adjacent" should be understood as "adjacent, ignoring white-space"
> - but that doesn't seem obvious to me.  It also sounds vaguely familiar,
> like I've had this discussion with someone before, but I can't locate
> the discussion.  Every example of adjacent string literals that appears
> in the standard has at least one white-space character separating them,
> so the intent is crystal-clear, but the wording doesn't clearly say so.
>
> If the phrase "White-space characters separating tokens are no longer
> significant." were moved from the beginning of the description of phase
> 7 to the beginning of the description phase 6, it would make the
> insignificance of white space separating string literals perfectly
> clear, and as far as I can see, would have no other effect

The word "adjacent" doesn't alway mean touching.  There is another
word for that, the word "adjoining".  Booking a hotel reservation
for adjacent rooms is not the same as a reservation for adjoining
rooms.

Back to comp.std.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-01-25 10:15 -0500
  Re: Adjacent string literals Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-01-26 12:22 +0000
    Re: Adjacent string literals Jakob Bohm <jb-usenet@wisemo.com.invalid> - 2021-01-26 13:48 +0100
      Re: Adjacent string literals Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-01-26 13:05 -0800
      Re: Adjacent string literals Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-01-26 21:40 +0000
        Re: Adjacent string literals Jakob Bohm <jb-usenet@wisemo.com.invalid> - 2021-01-28 09:53 +0100
          Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-01-28 05:45 -0500
    Re: Adjacent string literals Richard Damon <Richard@Damon-Family.org> - 2021-01-26 07:52 -0500
    Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-01-26 09:29 -0500
      Re: Adjacent string literals Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-01-26 21:46 +0000
        Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-01-26 18:28 -0500
          Re: Adjacent string literals Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-01-27 01:16 +0000
            Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-01-26 22:48 -0500
              Re: Adjacent string literals Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-01-27 15:46 +0000
                Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-01-27 11:20 -0500
                Re: Adjacent string literals Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-01-28 03:05 +0000
  Re: Adjacent string literals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2021-07-10 08:49 -0700
    Re: Adjacent string literals Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-07-10 14:58 -0700
      Re: Adjacent string literals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2021-07-22 10:29 -0700
    Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-11 11:41 -0700
      Re: Adjacent string literals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2021-07-22 15:26 -0700
        Re: Adjacent string literals James Kuyper <jameskuyper@alumni.caltech.edu> - 2021-07-22 17:29 -0700
          Re: Adjacent string literals Tim Rentsch <tr.17687@z991.linuxsc.com> - 2022-01-17 05:29 -0800

csiph-web