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* [Bug libstdc++/37906] New: has_trivial_default_constructor vs. deleted copy ctor
@ 2008-10-24 3:17 bkoz at gcc dot gnu dot org
2008-10-24 8:47 ` [Bug c++/37906] " paolo dot carlini at oracle dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: bkoz at gcc dot gnu dot org @ 2008-10-24 3:17 UTC (permalink / raw)
To: gcc-bugs
The following:
#include <type_traits>
struct b
{
b() = default;
b(const b&) = delete;
};
void test01()
{
typedef b test_type;
// typedef std::is_standard_layout<test_type> standard_layout_p;
typedef std::has_trivial_default_constructor<test_type> ctor_p;
typedef std::has_trivial_destructor<test_type> dtor_p;
// static_assert(standard_layout_p::value, "not standard_layout");
static_assert(ctor_p::value, "default ctor not trivial");
static_assert(dtor_p::value, "dtor not trivial");
}
Gives:
%$bld/H-x86-gcc.20081020/bin/g++ -std=gnu++0x -c standard_layout.cc
standard_layout.cc: In function 'void test01()':
standard_layout.cc:40: error: static assertion failed: "default ctor not
trivial"
Removing the copy constructor makes the error go away.
--
Summary: has_trivial_default_constructor vs. deleted copy ctor
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bkoz at gcc dot gnu dot org
GCC host triplet: all
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37906
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/37906] has_trivial_default_constructor vs. deleted copy ctor
2008-10-24 3:17 [Bug libstdc++/37906] New: has_trivial_default_constructor vs. deleted copy ctor bkoz at gcc dot gnu dot org
@ 2008-10-24 8:47 ` paolo dot carlini at oracle dot com
2008-12-04 14:48 ` jason at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: paolo dot carlini at oracle dot com @ 2008-10-24 8:47 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from paolo dot carlini at oracle dot com 2008-10-24 08:45 -------
Hi. This issue is really c++, because the library just forwards to the
"builtin" C++ trait. The latter in turn simply uses TYPE_HAS_TRIVIAL_DFLT, thus
seems to me similar to c++/36856, that is the appropriate fix isn't tweaking
the implementation of the traits itself, instead moving forward a bit more the
infrastructure in the C++ front-end to C++1x. I'd like to ask Jason opinion
about this anyway: in a nutshell, do you agree that in c++0x mode,
TYPE_HAS_TRIVIAL_DFLT should just return the correct answer?
--
paolo dot carlini at oracle dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |paolo dot carlini at oracle
| |dot com, jason at gcc dot
| |gnu dot org
Component|libstdc++ |c++
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37906
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/37906] has_trivial_default_constructor vs. deleted copy ctor
2008-10-24 3:17 [Bug libstdc++/37906] New: has_trivial_default_constructor vs. deleted copy ctor bkoz at gcc dot gnu dot org
2008-10-24 8:47 ` [Bug c++/37906] " paolo dot carlini at oracle dot com
@ 2008-12-04 14:48 ` jason at gcc dot gnu dot org
2008-12-04 19:03 ` jason at gcc dot gnu dot org
2008-12-22 2:29 ` jason at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu dot org @ 2008-12-04 14:48 UTC (permalink / raw)
To: gcc-bugs
--
jason at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |jason at gcc dot gnu dot org
|dot org |
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-12-04 14:45:50
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37906
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/37906] has_trivial_default_constructor vs. deleted copy ctor
2008-10-24 3:17 [Bug libstdc++/37906] New: has_trivial_default_constructor vs. deleted copy ctor bkoz at gcc dot gnu dot org
2008-10-24 8:47 ` [Bug c++/37906] " paolo dot carlini at oracle dot com
2008-12-04 14:48 ` jason at gcc dot gnu dot org
@ 2008-12-04 19:03 ` jason at gcc dot gnu dot org
2008-12-22 2:29 ` jason at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu dot org @ 2008-12-04 19:03 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from jason at gcc dot gnu dot org 2008-12-04 19:01 -------
Subject: Bug 37906
Author: jason
Date: Thu Dec 4 19:00:03 2008
New Revision: 142442
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142442
Log:
PR c++/37906
* decl.c (grok_special_member_properties): Set TYPE_HAS_COMPLEX_DFLT
here.
* class.c (check_bases_and_members): Rather than assuming any
user-declared default constructor is complex here.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/defaulted6.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37906
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/37906] has_trivial_default_constructor vs. deleted copy ctor
2008-10-24 3:17 [Bug libstdc++/37906] New: has_trivial_default_constructor vs. deleted copy ctor bkoz at gcc dot gnu dot org
` (2 preceding siblings ...)
2008-12-04 19:03 ` jason at gcc dot gnu dot org
@ 2008-12-22 2:29 ` jason at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu dot org @ 2008-12-22 2:29 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from jason at gcc dot gnu dot org 2008-12-22 02:26 -------
Fixed.
--
jason at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37906
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2008-12-22 2:29 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2008-10-24 3:17 [Bug libstdc++/37906] New: has_trivial_default_constructor vs. deleted copy ctor bkoz at gcc dot gnu dot org
2008-10-24 8:47 ` [Bug c++/37906] " paolo dot carlini at oracle dot com
2008-12-04 14:48 ` jason at gcc dot gnu dot org
2008-12-04 19:03 ` jason at gcc dot gnu dot org
2008-12-22 2:29 ` jason at gcc dot gnu dot org
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