[Bug preprocessor/12743] [3.4 Regression] Multi-line strings not diagnosed when occurring in a macro call

["jsm at polyomino dot org dot uk" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12743



------- Additional Comments From jsm at polyomino dot org dot uk  2003-10-24 15:26 -------
Subject: Re:  [3.4 Regression] Multi-line strings
 not diagnosed when occurring in a macro call

On Fri, 24 Oct 2003, neil at daikokuya dot co dot uk wrote:

> This is intended behaviour.  It's undefined according to the
> standard, and I changed the way we do it in 3.4.

Although undefined so the standard doesn't _require_ diagnostics (for
unterminated string and character constants) there's a clear regression in
usefulness that unportable code with such unterminated constants
(_wherever_ they appear, including in skipped blocks or #error or #warning
lines or macro definitions) no longer receives diagnostics to indicate
their unportability (even with -pedantic -Wall -Wextra).  AFAICT there's
also a documentedness regression (I don't recall any response to my
request <http://gcc.gnu.org/ml/gcc-patches/2003-04/msg01855.html> for
documentation of these extensions, and don't see any such documentation in
the CPP manual).