[Bug c++/106040] New: gcc reports error in aggregate when member has explicit constructor

[Bug c++/106040] New: gcc reports error in aggregate when member has explicit constructor

[ldalessandro at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106040

            Bug ID: 106040
           Summary: gcc reports error in aggregate when member has
                    explicit constructor
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ldalessandro at gmail dot com
  Target Milestone: ---

gcc fails to compile the following example, as it seems to be treating .i{0} as
an implicit operation rather than an explicit construction. Both clang and MSVC
accept the example.

    struct foo {
        explicit foo(int) {}
    };

    struct bar {
        foo i;
    };

    bar x {
        .i{0} // <-- error:
    };

error: <source>:11:1: error: converting to 'foo' from initializer list would
use explicit constructor 'foo::foo(int)'

live: https://godbolt.org/z/hhvnGaK6c

[Bug c++/106040] gcc reports error in aggregate when member has explicit constructor

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106040

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |10.1.0, 11.1.0, 12.1.0,
                   |                            |8.1.0, 9.1.0
           Keywords|                            |rejects-valid

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. Not a regression

[Bug c++/106040] gcc reports error in aggregate when member has explicit constructor

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106040

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-06-21

[Bug c++/106040] gcc reports error in aggregate when member has explicit constructor

[pj at patrickjohnston dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106040

pj at patrickjohnston dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pj at patrickjohnston dot org

--- Comment #2 from pj at patrickjohnston dot org ---
Note that http://eel.is/c++draft/dcl.init.aggr#4.2
> the element is copy-initialized from the corresponding initializer-clause or is initialized with the brace-or-equal-initializer of the corresponding designated-initializer-clause
possibly suggests that copy initialisation semantics are used (meaning no
explicit conversion), dependent on if your interpretation agrees that the
"copy-initialized" bit still applies to the brace-or-equal-initializer bit

[Bug c++/106040] gcc reports error in aggregate when member has explicit constructor

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106040

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |ppalka at gcc dot gnu.org
         Resolution|---                         |DUPLICATE

--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
dup

*** This bug has been marked as a duplicate of bug 91319 ***