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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) -- links below jump to the message on this page -- 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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