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Re: Adjacent string literals

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

> On 1/26/21 8:16 PM, Ben Bacarisse wrote:
>> James Kuyper <jameskuyper@alumni.caltech.edu> writes:
> ...
>>> Yes, it is. In "a""b", the two tokens are adjacent. In "a" "b", they are
>>> not, because both are adjacent to some white-space instead.
>> 
>> Adjacent does not mean with nothing in between (thought it can, of
>> course).  What's more, things can be adjacent to each other, and also
>> adjacent to something in between.  I can say that there was a fire in
>> the house adjacent to mine.  The two house are adjacent.  But both are
>> adjacent to the lane separating them.
>
> It takes at least two dimensions for the issue you raise to come up.

I don't follow.  1 and 2 are adjacent integers on the real line
(i.e. despite having other kinds of number between them).  In addition,
they are both integers adjacent to 1/2.

> As
> far as the C standard is concerned, source code is a one-dimensional
> sequence of characters. It's possible to think of the text
> two-dimensionally, but the standard doesn't make use of that fact in any
> way that I'm aware of. I don't think anyone would suggest that two
> string literals that are vertically adjacent to each other:
>
>     char first = "James";
>     char second = "Kuyper";
>
> should be merged.
> Even if you acknowledge only that this is one possible way of
> interpreting "adjacent", that would mean the meaning is ambiguous.

Lots of words in the standard could, at a pinch, be taken to mean
something other than what is obviously intended.  But if you think
someone might read about phase 6 and think that "a""b" will be
concatenated but not "a" "b", then you should file a defect report.

> Moving the first sentence of translation phase 7 to be the first
> sentence of translation phase 6 would remove all ambiguity, and have, as
> far as I can see, no other consequence.

I think the strongest case for the possibility of misunderstanding comes
from this sentence being where it is.  I don't see any problem with the
word "adjacent", but I can imagine someone wondering why this sentence
is where it is if not to do what you are suggesting.

-- 
Ben.

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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

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