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* [Bug c++/56772] New: placement new operator does not work inside function template.
@ 2013-03-28 20:59 meng at g dot clemson.edu
2013-03-28 23:43 ` [Bug c++/56772] placement new operator does not work inside function template for array types paolo.carlini at oracle dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: meng at g dot clemson.edu @ 2013-03-28 20:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56772
Bug #: 56772
Summary: placement new operator does not work inside function
template.
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: meng@g.clemson.edu
g++-4.7.0 emits an error for the following piece of code.
------------------------- BEGIN -----------------------------
#include <cstddef>
#include <new>
template <typename T = size_t>
void f ()
{
size_t coord [2][2];
new (&coord) size_t [2][2]
{
{0,0},
{0,0},
};
}
int main ()
{
f<>();
}
------------------------- END -----------------------------
The error message was
error: parenthesized initializer in array new [-fpermissive]
sorry, unimplemented: cannot initialize multi-dimensional array with
initializer
I observed the same behavior on 4.8.0. The problem only occurs inside function
template according to my test. If I made f an ordinary function, the code was
accepted. Clang 3.2 and Visual Studio 2012 all accept the code. These facts led
me to assume this is a bug in g++.
Below is my g++ version.
Reading specs from
/home/meng/gcc/4.7.0/lib/gcc/x86_64-unknown-linux-gnu/4.7.0/specs
COLLECT_GCC=/home/meng/gcc/4.7.0/bin/c++
COLLECT_LTO_WRAPPER=/home/meng/gcc/4.7.0/libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ./configure --prefix=/home/meng/gcc/4.7.0
--enable-languages=c,c++ -disable-multilib
Thread model: posix
gcc version 4.7.0 (GCC)
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/56772] placement new operator does not work inside function template for array types.
2013-03-28 20:59 [Bug c++/56772] New: placement new operator does not work inside function template meng at g dot clemson.edu
@ 2013-03-28 23:43 ` paolo.carlini at oracle dot com
2013-03-29 0:45 ` meng at g dot clemson.edu
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: paolo.carlini at oracle dot com @ 2013-03-28 23:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56772
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|meng at g dot clemson.edu |
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-03-28 23:43:23 UTC ---
I see a sorry message thus the issue seems known.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/56772] placement new operator does not work inside function template for array types.
2013-03-28 20:59 [Bug c++/56772] New: placement new operator does not work inside function template meng at g dot clemson.edu
2013-03-28 23:43 ` [Bug c++/56772] placement new operator does not work inside function template for array types paolo.carlini at oracle dot com
@ 2013-03-29 0:45 ` meng at g dot clemson.edu
2013-04-01 20:32 ` jason at gcc dot gnu.org
2013-04-01 21:22 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: meng at g dot clemson.edu @ 2013-03-29 0:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56772
--- Comment #2 from meng at g dot clemson.edu 2013-03-29 00:45:23 UTC ---
(In reply to comment #1)
> I see a sorry message thus the issue seems known.
I agree. What confused me was that the feature is not unimplemented, it worked
well for ordinary functions. I wonder what makes function templates a special
exception in this case.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/56772] placement new operator does not work inside function template for array types.
2013-03-28 20:59 [Bug c++/56772] New: placement new operator does not work inside function template meng at g dot clemson.edu
2013-03-28 23:43 ` [Bug c++/56772] placement new operator does not work inside function template for array types paolo.carlini at oracle dot com
2013-03-29 0:45 ` meng at g dot clemson.edu
@ 2013-04-01 20:32 ` jason at gcc dot gnu.org
2013-04-01 21:22 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2013-04-01 20:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56772
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2013-04-01
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] 5+ messages in thread
* [Bug c++/56772] placement new operator does not work inside function template for array types.
2013-03-28 20:59 [Bug c++/56772] New: placement new operator does not work inside function template meng at g dot clemson.edu
` (2 preceding siblings ...)
2013-04-01 20:32 ` jason at gcc dot gnu.org
@ 2013-04-01 21:22 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2013-04-01 21:22 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56772
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.8.1
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-01 21:22:40 UTC ---
Fixed for 4.8.1/4.9.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2013-04-01 21:22 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2013-03-28 20:59 [Bug c++/56772] New: placement new operator does not work inside function template meng at g dot clemson.edu
2013-03-28 23:43 ` [Bug c++/56772] placement new operator does not work inside function template for array types paolo.carlini at oracle dot com
2013-03-29 0:45 ` meng at g dot clemson.edu
2013-04-01 20:32 ` jason at gcc dot gnu.org
2013-04-01 21:22 ` jason at gcc dot gnu.org
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