[Bug c++/52202] New: [C++11][DR 1376] Should not extend lifetime of temporary wrapped in static_cast to reference type

[Bug c++/52202] New: [C++11][DR 1376] Should not extend lifetime of temporary wrapped in static_cast to reference type

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52202

             Bug #: 52202
           Summary: [C++11][DR 1376] Should not extend lifetime of
                    temporary wrapped in static_cast to reference type
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jason@gcc.gnu.org


// Core 1376                                                                    
// { dg-options -std=c++0x }                                                    

extern "C" void abort();
bool x;
struct T { ~T() { if (x) abort (); } };
int main()
{
  T&& r = static_cast<T&&>(T());
  x = true;
}

[Bug c++/52202] [C++11][DR 1376] Should not extend lifetime of temporary wrapped in static_cast to reference type

[jens.maurer at gmx dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52202

--- Comment #5 from Jens Maurer <jens.maurer at gmx dot net> ---
Core issue 1299 resolved via http://wg21.link/p0727 does in fact
lifetime-extend the temporary in the example.

This bug report should therefore be closed without action.
(If a test case is missing that lifetime-extension does happen, the example
code can have its "abort" condition reversed to suit that purpose.)

[Bug c++/52202] [C++11][DR 1376] Should not extend lifetime of temporary wrapped in static_cast to reference type

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52202

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'll add the test.

[Bug c++/52202] [C++11][DR 1376] Should not extend lifetime of temporary wrapped in static_cast to reference type

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52202

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Marek Polacek <mpolacek@gcc.gnu.org>:

https://gcc.gnu.org/g:a7698c0e1ecad65b1ab651acc82b34e12c7efd35

commit r11-8022-ga7698c0e1ecad65b1ab651acc82b34e12c7efd35
Author: Marek Polacek <polacek@redhat.com>
Date:   Tue Apr 6 22:17:33 2021 -0400

    c++: Add test for Core issue 1376 [PR52202]

    As Jens says in the PR, we handle this correctly.

    gcc/testsuite/ChangeLog:

            PR c++/52202
            * g++.dg/cpp0x/rv-life.C: New test.

[Bug c++/52202] [C++11][DR 1376] Should not extend lifetime of temporary wrapped in static_cast to reference type

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52202

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

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

--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Done.