[Bug libstdc++/104099] [12 Regression] basic_string(nullptr) constructor should not be present before C++23

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104099

Jonathan Wakely  changed:

   What|Removed |Added

 Resolution|--- |FIXED
 Status|ASSIGNED|RESOLVED

--- Comment #2 from Jonathan Wakely  ---
Fixed

[Bug libstdc++/104099] [12 Regression] basic_string(nullptr) constructor should not be present before C++23

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104099

--- Comment #1 from CVS Commits  ---
The master branch has been updated by Jonathan Wakely :

https://gcc.gnu.org/g:fe3ed885cda5ab920d361b694ee539242052022f

commit r12-6698-gfe3ed885cda5ab920d361b694ee539242052022f
Author: Jonathan Wakely 
Date:   Tue Jan 18 16:26:45 2022 +

libstdc++: Limit new basic_string(nullptr_t) constructor to C++23
[PR104099]

The new deleted constructors added by P2166R1 are a breaking change,
making previously valid code ill-formed in C++23. As a result, they
should only be defined for C++23 and not for C++11 and up.

libstdc++-v3/ChangeLog:

PR libstdc++/104099
* include/bits/basic_string.h (basic_string(nullptr_t)): Only
define for C++23.
(operator=(nullptr_t)): Likewise.
* include/bits/cow_string.h: Likewise.
* include/std/string_view (basic_string_view(nullptr_t)):
Likewise.
* testsuite/21_strings/basic_string/cons/char/nullptr.cc: Adjust
expected error. Add examples that become ill-formed in C++23.
* testsuite/21_strings/basic_string_view/cons/char/nonnull.cc:
Adjust expected errors.
* testsuite/21_strings/basic_string_view/cons/wchar_t/nonnull.cc:
Likewise.

[Bug libstdc++/104099] [12 Regression] basic_string(nullptr) constructor should not be present before C++23

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104099

Jonathan Wakely  changed:

   What|Removed |Added

   Last reconfirmed||2022-01-18
   Target Milestone|--- |12.0
   Priority|P3  |P1
  Known to fail||12.0
  Known to work||11.2.0
 Status|UNCONFIRMED |ASSIGNED
   Assignee|unassigned at gcc dot gnu.org  |redi at gcc dot gnu.org
 Ever confirmed|0   |1