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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/55971] Preprocessor macros with C++11 raw string
 literals fail to compile
Date: Sat, 05 Nov 2022 14:31:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D55971

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Lewis Hyatt <lhyatt@gcc.gnu.org>:

https://gcc.gnu.org/g:3ad2167bbac8ae83b1e91305b105ab5287bdac55

commit r13-3697-g3ad2167bbac8ae83b1e91305b105ab5287bdac55
Author: Lewis Hyatt <lhyatt@gmail.com>
Date:   Wed Jun 15 18:06:53 2022 -0400

    c++: libcpp: Support raw strings with newlines in directives [PR55971]

    It's not currently possible to use a C++11 raw string containing a newl=
ine
as
    part of the definition of a macro, or in any other preprocessing direct=
ive,
    such as:

     #define X R"(two
    lines)"

     #error R"(this error has
    two lines)"

    Add support for that by relaxing the conditions under which
    _cpp_get_fresh_line() refuses to get a new line. For the case of lexing=
 a
raw
    string, it's OK to do so as long as there is another line within the
current
    buffer. The code in cpp_get_fresh_line() was refactored into a new func=
tion
    get_fresh_line_impl(), so that the new logic is applied only when
processing a
    raw string and not any other times.

    libcpp/ChangeLog:

            PR preprocessor/55971
            * lex.cc (get_fresh_line_impl): New function refactoring the co=
de
            from...
            (_cpp_get_fresh_line): ...here.
            (lex_raw_string): Use the new version of get_fresh_line_impl() =
to
            support raw strings containing new lines when processing a
directive.

    gcc/testsuite/ChangeLog:

            PR preprocessor/55971
            * c-c++-common/raw-string-directive-1.c: New test.
            * c-c++-common/raw-string-directive-2.c: New test.

    gcc/c-family/ChangeLog:

            PR preprocessor/55971
            * c-ppoutput.cc (adjust_for_newlines): Update comment.=