[Bug c++/96645] [13/14/15/16/17 Regression] [CWG2335] std::variant default constructor and unparsed DMI

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96645

--- Comment #39 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <[email protected]>:

https://gcc.gnu.org/g:e3e1c72649c3a0b48af70f88bcd942c46b0d00ab

commit r17-2718-ge3e1c72649c3a0b48af70f88bcd942c46b0d00ab
Author: Jason Merrill <[email protected]>
Date:   Fri Jul 24 15:17:32 2026 -0400

    c++: parse trivial DMI immediately [PR96645]

    The current direction of CWG2335 is to parse complete-class contexts as
    needed rather than always wait until the end of the outermost class.

    This doesn't fully implement that (nor fully fix PR96645), but takes a step
    in that direction by allowing simple cases that do no name lookup; then
    being in complete class scope makes no difference.

            CWG 2335
            PR c++/96645

    gcc/cp/ChangeLog:

            * parser.cc (cp_parser_early_parsing_nsdmi): New.
            (cp_parser_member_declaration): Call it.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/nsdmi10.C: Distinguish simple case.
            * g++.dg/ext/is_constructible7.C: New.