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* [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken
@ 2009-08-21 16:22 eric dot niebler at gmail dot com
2009-08-21 16:31 ` [Bug c++/41141] " redi at gcc dot gnu dot org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: eric dot niebler at gmail dot com @ 2009-08-21 16:22 UTC (permalink / raw)
To: gcc-bugs
GCC is claiming support for Standard Layout Types
(http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2342.htm) in its 4.4
series. However, the following example, taken directly from n2342, fails to
compile (with either --std=gnu++0x or --std=c++0x):
{{{
#include <type_traits>
struct B
{
int n;
B() = default;
B(int n_) : n(n_) {}
};
static_assert(std::is_pod<B>::value, "B is not POD!");
int main() {}
}}}
I have checked with Beman Dawes, the author of n2342, and he confirms that the
code should compile under a conforming c++0x compiler.
--
Summary: Support for C++0x standard layout and trivial types is
broken
Product: gcc
Version: 4.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: eric dot niebler at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41141
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/41141] Support for C++0x standard layout and trivial types is broken
2009-08-21 16:22 [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken eric dot niebler at gmail dot com
@ 2009-08-21 16:31 ` redi at gcc dot gnu dot org
2009-08-21 16:35 ` [Bug web/41141] " paolo dot carlini at oracle dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: redi at gcc dot gnu dot org @ 2009-08-21 16:31 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from redi at gcc dot gnu dot org 2009-08-21 16:30 -------
I think the docs for 4.4 might be lying, or maybe it's just std::is_pod that
doesn't work correctly.
It works with 4.5, probably since bug 37907 was fixed.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41141
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug web/41141] Support for C++0x standard layout and trivial types is broken
2009-08-21 16:22 [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken eric dot niebler at gmail dot com
2009-08-21 16:31 ` [Bug c++/41141] " redi at gcc dot gnu dot org
@ 2009-08-21 16:35 ` paolo dot carlini at oracle dot com
2009-08-21 16:40 ` redi at gcc dot gnu dot org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: paolo dot carlini at oracle dot com @ 2009-08-21 16:35 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from paolo dot carlini at oracle dot com 2009-08-21 16:35 -------
Right, this is just a bug in the 4.4 cxx0x_status.html, I'll fix it
momentarily.
--
paolo dot carlini at oracle dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |paolo dot carlini at oracle
|dot org |dot com
Status|UNCONFIRMED |ASSIGNED
Component|c++ |web
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-08-21 16:35:23
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41141
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug web/41141] Support for C++0x standard layout and trivial types is broken
2009-08-21 16:22 [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken eric dot niebler at gmail dot com
2009-08-21 16:31 ` [Bug c++/41141] " redi at gcc dot gnu dot org
2009-08-21 16:35 ` [Bug web/41141] " paolo dot carlini at oracle dot com
@ 2009-08-21 16:40 ` redi at gcc dot gnu dot org
2009-08-21 16:42 ` paolo dot carlini at oracle dot com
2009-08-21 17:05 ` paolo dot carlini at oracle dot com
4 siblings, 0 replies; 6+ messages in thread
From: redi at gcc dot gnu dot org @ 2009-08-21 16:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from redi at gcc dot gnu dot org 2009-08-21 16:39 -------
Does the C++0x status in the libstdc++ manual also need updating? it says
is_system_layout is missing - I think that should be is_standard_layout, but
it's not missing on trunk now anyway.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41141
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug web/41141] Support for C++0x standard layout and trivial types is broken
2009-08-21 16:22 [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken eric dot niebler at gmail dot com
` (2 preceding siblings ...)
2009-08-21 16:40 ` redi at gcc dot gnu dot org
@ 2009-08-21 16:42 ` paolo dot carlini at oracle dot com
2009-08-21 17:05 ` paolo dot carlini at oracle dot com
4 siblings, 0 replies; 6+ messages in thread
From: paolo dot carlini at oracle dot com @ 2009-08-21 16:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from paolo dot carlini at oracle dot com 2009-08-21 16:42 -------
Fixed. Jonathan, probably, let's deal with the separately.
--
paolo dot carlini at oracle dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41141
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug web/41141] Support for C++0x standard layout and trivial types is broken
2009-08-21 16:22 [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken eric dot niebler at gmail dot com
` (3 preceding siblings ...)
2009-08-21 16:42 ` paolo dot carlini at oracle dot com
@ 2009-08-21 17:05 ` paolo dot carlini at oracle dot com
4 siblings, 0 replies; 6+ messages in thread
From: paolo dot carlini at oracle dot com @ 2009-08-21 17:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from paolo dot carlini at oracle dot com 2009-08-21 17:05 -------
Jon, I had a look and apparently the xml file in the v3 doc directory needs
*many* more fixes/updates besides that one. If you can find the time, a more
comprehensive patch would be really welcome, otherwise, I'll try to do it, at
some point.
--
paolo dot carlini at oracle dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |redi at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41141
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-08-21 17:05 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-08-21 16:22 [Bug c++/41141] New: Support for C++0x standard layout and trivial types is broken eric dot niebler at gmail dot com
2009-08-21 16:31 ` [Bug c++/41141] " redi at gcc dot gnu dot org
2009-08-21 16:35 ` [Bug web/41141] " paolo dot carlini at oracle dot com
2009-08-21 16:40 ` redi at gcc dot gnu dot org
2009-08-21 16:42 ` paolo dot carlini at oracle dot com
2009-08-21 17:05 ` paolo dot carlini at oracle dot com
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