[Bug libstdc++/106852] New: Implement C++23 P2465R3 Standard Library Modules std and std.compat

[Bug libstdc++/106852] New: Implement C++23 P2465R3 Standard Library Modules std and std.compat

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852

            Bug ID: 106852
           Summary: Implement C++23 P2465R3 Standard Library Modules std
                    and std.compat
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
        Depends on: 102341
            Blocks: 106749
  Target Milestone: ---

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2465r3.pdf


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102341
[Bug 102341] [modules] "error: conflicting exporting declaration" for anything
previously declared
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106749
[Bug 106749] Implement C++23 library features

[Bug libstdc++/106852] Implement C++23 P2465R3 Standard Library Modules std and std.compat

[de34 at live dot cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852

Jiang An <de34 at live dot cn> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |de34 at live dot cn

--- Comment #1 from Jiang An <de34 at live dot cn> ---
Should std.compat provide 3-argument hypot overloads in the global namespace?

MSVC STL's std.compat intentionally doesn't provide them in the global
namespace (https://github.com/microsoft/STL/pull/3108). I think this possibly
makes sense, and we may submit an LWG issue to exclude them from the global
namespace. However, for libstdc++, such exclusion would slightly complicate the
implementation.

[Bug libstdc++/106852] Implement C++23 P2465R3 Standard Library Modules std and std.compat

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852
Bug 106852 depends on bug 106848, which changed state.

Bug 106848 Summary: ICE when compiling module interface file with -g: error: type variant differs by TYPE_MAX_VALUE
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106848

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

[Bug libstdc++/106852] Implement C++23 P2465R3 Standard Library Modules std and std.compat

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=103524
   Last reconfirmed|                            |2022-12-09

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.

[Bug libstdc++/106852] Implement C++23 P2465R3 Standard Library Modules std and std.compat

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://github.com/microsof
                   |                            |t/STL/issues/3945

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
As per https://github.com/microsoft/STL/issues/3945 we should support the std
module in C++20 mode too.

[Bug libstdc++/106852] Implement C++23 P2465R3 Standard Library Modules std and std.compat

[nshead at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852
Bug 106852 depends on bug 106849, which changed state.

Bug 106849 Summary: internal compiler error: tree check: expected none of template_decl, have template_decl in do_nonmember_using_decl, at cp/name-lookup.cc:4841
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106849

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

[Bug libstdc++/106852] Implement C++23 P2465R3 Standard Library Modules std and std.compat

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106852

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement