public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/51299] New: [C++11] erroneous nullptr warning on dynamic cast
@ 2011-11-25 3:01 jarrydb at cse dot unsw.edu.au
2011-11-25 8:31 ` [Bug c++/51299] " paolo.carlini at oracle dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: jarrydb at cse dot unsw.edu.au @ 2011-11-25 3:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51299
Bug #: 51299
Summary: [C++11] erroneous nullptr warning on dynamic cast
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jarrydb@cse.unsw.edu.au
The below code compiled with -Wzero-as-null-pointer-constant produces an
erroneous warning on a dynamic cast.
g++ -std=gnu++11 nullcast.cpp -c -Wzero-as-null-pointer-constant
nullcast.cpp: In function ‘void foo(Base*)’:
nullcast.cpp:13:40: warning: zero as null pointer constant
[-Wzero-as-null-pointer-constant]
nullcast.cpp:13:40: warning: zero as null pointer constant
[-Wzero-as-null-pointer-constant]
class Base
{
public:
virtual ~Base() = default;
};
class Derived : public Base
{
};
void foo(Base *b)
{
Derived *d = dynamic_cast<Derived*>(b);
}
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/jarrydb/current/soft/install-latest/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/jarrydb/current/soft/src/gcc-git/configure
--prefix=/home/jarrydb/current/soft/install-latest --disable-multilib
--enable-languages=c,c++
Thread model: posix
gcc version 4.7.0 20111125 (experimental) (GCC)
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/51299] [C++11] erroneous nullptr warning on dynamic cast
2011-11-25 3:01 [Bug c++/51299] New: [C++11] erroneous nullptr warning on dynamic cast jarrydb at cse dot unsw.edu.au
@ 2011-11-25 8:31 ` paolo.carlini at oracle dot com
2011-11-30 18:43 ` paolo.carlini at oracle dot com
2011-11-30 18:43 ` paolo at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-11-25 8:31 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51299
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011-11-25
AssignedTo|unassigned at gcc dot |paolo.carlini at oracle dot
|gnu.org |com
Ever Confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-11-25 02:02:41 UTC ---
On it.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/51299] [C++11] erroneous nullptr warning on dynamic cast
2011-11-25 3:01 [Bug c++/51299] New: [C++11] erroneous nullptr warning on dynamic cast jarrydb at cse dot unsw.edu.au
2011-11-25 8:31 ` [Bug c++/51299] " paolo.carlini at oracle dot com
@ 2011-11-30 18:43 ` paolo.carlini at oracle dot com
2011-11-30 18:43 ` paolo at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-11-30 18:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51299
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.7.0
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-11-30 18:32:27 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/51299] [C++11] erroneous nullptr warning on dynamic cast
2011-11-25 3:01 [Bug c++/51299] New: [C++11] erroneous nullptr warning on dynamic cast jarrydb at cse dot unsw.edu.au
2011-11-25 8:31 ` [Bug c++/51299] " paolo.carlini at oracle dot com
2011-11-30 18:43 ` paolo.carlini at oracle dot com
@ 2011-11-30 18:43 ` paolo at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: paolo at gcc dot gnu.org @ 2011-11-30 18:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51299
--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2011-11-30 18:31:33 UTC ---
Author: paolo
Date: Wed Nov 30 18:31:30 2011
New Revision: 181854
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181854
Log:
/cp
2011-11-30 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/51299
* rtti.c (ifnonnull): Use nullptr_node.
(build_dynamic_cast_1): Call cp_truthvalue_conversion instead
of c_common_truthvalue_conversion.
/testsuite
2011-11-30 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/51299
* g++.dg/warn/Wzero-as-null-pointer-constant-4.C: New.
Added:
trunk/gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/rtti.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-11-30 18:32 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-11-25 3:01 [Bug c++/51299] New: [C++11] erroneous nullptr warning on dynamic cast jarrydb at cse dot unsw.edu.au
2011-11-25 8:31 ` [Bug c++/51299] " paolo.carlini at oracle dot com
2011-11-30 18:43 ` paolo.carlini at oracle dot com
2011-11-30 18:43 ` paolo at gcc dot gnu.org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).