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* [Bug c++/52915] New: [C++11] Deleted default-constructor of anonymous unions not honored
@ 2012-04-09 16:32 daniel.kruegler at googlemail dot com
2012-04-12 22:07 ` [Bug c++/52915] " jason at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: daniel.kruegler at googlemail dot com @ 2012-04-09 16:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52915
Bug #: 52915
Summary: [C++11] Deleted default-constructor of anonymous
unions not honored
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: daniel.kruegler@googlemail.com
gcc 4.8.0 20120318 (experimental) in C++11 mode accepts the following code:
//---
struct S {
int val;
S(int v) : val(v) {}
};
void f() {
union { S a; };
}
//---
This seems to violate to what the standard says. According to 9.5 p5:
"A union of the form
union { member-specification } ;
is called an anonymous union; it defines an unnamed object of unnamed type."
combined with 12.1 p5 b6:
"A defaulted default constructor for class X is defined as deleted if:
[..]
— any [..] non-static data member with no brace-or-equal-initializer, has class
type M [..] and [..] M has no default constructor [..]"
The last item has the effect that the anonymous union defined in f() is a
union-like class that has a deleted default constructor, but the definition in
f() also defines an unnamed object of that type which is default-initialized.
It seems that gcc does not respect the last part of the semantics of this
declaration.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/52915] [C++11] Deleted default-constructor of anonymous unions not honored
2012-04-09 16:32 [Bug c++/52915] New: [C++11] Deleted default-constructor of anonymous unions not honored daniel.kruegler at googlemail dot com
@ 2012-04-12 22:07 ` jason at gcc dot gnu.org
2012-04-13 19:47 ` jason at gcc dot gnu.org
2012-04-13 19:53 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jason at gcc dot gnu.org @ 2012-04-12 22:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52915
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2012-04-12
CC| |jason at gcc dot gnu.org
AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/52915] [C++11] Deleted default-constructor of anonymous unions not honored
2012-04-09 16:32 [Bug c++/52915] New: [C++11] Deleted default-constructor of anonymous unions not honored daniel.kruegler at googlemail dot com
2012-04-12 22:07 ` [Bug c++/52915] " jason at gcc dot gnu.org
@ 2012-04-13 19:47 ` jason at gcc dot gnu.org
2012-04-13 19:53 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jason at gcc dot gnu.org @ 2012-04-13 19:47 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52915
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> 2012-04-13 19:43:43 UTC ---
Author: jason
Date: Fri Apr 13 19:43:37 2012
New Revision: 186432
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186432
Log:
PR c++/52915
* decl2.c (finish_anon_union): Use cp_finish_decl.
* error.c (dump_function_name): Avoid showing anonymous "name".
Added:
trunk/gcc/testsuite/g++.dg/other/anon-union2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl2.c
trunk/gcc/cp/error.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/52915] [C++11] Deleted default-constructor of anonymous unions not honored
2012-04-09 16:32 [Bug c++/52915] New: [C++11] Deleted default-constructor of anonymous unions not honored daniel.kruegler at googlemail dot com
2012-04-12 22:07 ` [Bug c++/52915] " jason at gcc dot gnu.org
2012-04-13 19:47 ` jason at gcc dot gnu.org
@ 2012-04-13 19:53 ` jason at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jason at gcc dot gnu.org @ 2012-04-13 19:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52915
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.8.0
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2012-04-13 19:53:28 UTC ---
Fixed for 4.8.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-04-09 16:32 [Bug c++/52915] New: [C++11] Deleted default-constructor of anonymous unions not honored daniel.kruegler at googlemail dot com
2012-04-12 22:07 ` [Bug c++/52915] " jason at gcc dot gnu.org
2012-04-13 19:47 ` jason at gcc dot gnu.org
2012-04-13 19:53 ` jason at gcc dot gnu.org
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