[Bug c++/106759] __has_builtin doesn't report __is_nothrow_constructible as supported

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106759

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>:

https://gcc.gnu.org/g:fe915f35b7d8dc768a2b977c09aa02f933e1d1e9

commit r13-2277-gfe915f35b7d8dc768a2b977c09aa02f933e1d1e9
Author: Marek Polacek <pola...@redhat.com>
Date:   Mon Aug 29 16:54:05 2022 -0400

    c++: __has_builtin gives the wrong answer [PR106759]

    We've supported __is_nothrow_constructible since r11-4386, but
    names_builtin_p didn't know about it, so it gave the wrong answer for
     #if __has_builtin(__is_nothrow_constructible)
     ...
     #endif

    I've tested all C++-only built-ins and only two were missing.

            PR c++/106759

    gcc/cp/ChangeLog:

            * cp-objcp-common.cc (names_builtin_p): Handle
RID_IS_NOTHROW_ASSIGNABLE
            and RID_IS_NOTHROW_CONSTRUCTIBLE.

    gcc/testsuite/ChangeLog:

            * g++.dg/ext/has-builtin-1.C: New test.