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* [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper @ 2011-02-17 14:32 dev.lists at jessamine dot co.uk 2011-02-17 14:56 ` [Bug c++/47783] [4.6 Regression] " redi at gcc dot gnu.org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: dev.lists at jessamine dot co.uk @ 2011-02-17 14:32 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 Summary: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: dev.lists@jessamine.co.uk Compiling the following program with warning options -W -Wall yields <stdin>: In function ‘void f(ref_wrapper)’: <stdin>:6:6: warning: parameter ‘ref’ set but not used [-Wunused-but-set-parameter] If the reference-to-int is replaced with a pointer-to-int and dereference and address-of operators are used in the appropriate places the warning does not occur. In all cases and at all optimization levels the resulting program returns 7 as expected. struct ref_wrapper { int& i; }; void f( ref_wrapper ref ) { ref.i = 7; } int main() { int x = 1; ref_wrapper xref = {x}; f(xref); return x; } ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk @ 2011-02-17 14:56 ` redi at gcc dot gnu.org 2011-02-17 15:39 ` rguenth at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: redi at gcc dot gnu.org @ 2011-02-17 14:56 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic Status|UNCONFIRMED |NEW Last reconfirmed| |2011.02.17 14:32:03 Summary|Warning 'set but not used' |[4.6 Regression] Warning |[-Wunused-but-set-parameter |'set but not used' |] incorrectly issued for |[-Wunused-but-set-parameter |update through reference |] incorrectly issued for |wrapper |update through reference | |wrapper Ever Confirmed|0 |1 --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-02-17 14:32:03 UTC --- confirmed - no warning with 4.4 or 4.5 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk 2011-02-17 14:56 ` [Bug c++/47783] [4.6 Regression] " redi at gcc dot gnu.org @ 2011-02-17 15:39 ` rguenth at gcc dot gnu.org 2011-02-17 15:50 ` paolo.carlini at oracle dot com ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: rguenth at gcc dot gnu.org @ 2011-02-17 15:39 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.6.0 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk 2011-02-17 14:56 ` [Bug c++/47783] [4.6 Regression] " redi at gcc dot gnu.org 2011-02-17 15:39 ` rguenth at gcc dot gnu.org @ 2011-02-17 15:50 ` paolo.carlini at oracle dot com 2011-02-17 17:56 ` jakub at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: paolo.carlini at oracle dot com @ 2011-02-17 15:50 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-02-17 15:39:13 UTC --- Let's CC Jakub... ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk ` (2 preceding siblings ...) 2011-02-17 15:50 ` paolo.carlini at oracle dot com @ 2011-02-17 17:56 ` jakub at gcc dot gnu.org 2011-02-17 20:49 ` jakub at gcc dot gnu.org 2011-02-17 20:53 ` jakub at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: jakub at gcc dot gnu.org @ 2011-02-17 17:56 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org |gnu.org | --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-17 17:13:45 UTC --- Created attachment 23388 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23388 gcc46-pr47783.patch Untested fix. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk ` (3 preceding siblings ...) 2011-02-17 17:56 ` jakub at gcc dot gnu.org @ 2011-02-17 20:49 ` jakub at gcc dot gnu.org 2011-02-17 20:53 ` jakub at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: jakub at gcc dot gnu.org @ 2011-02-17 20:49 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-17 20:44:16 UTC --- Author: jakub Date: Thu Feb 17 20:44:14 2011 New Revision: 170255 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170255 Log: PR c++/47783 * cvt.c (convert_from_reference): Call mark_exp_read. * g++.dg/warn/Wunused-parm-4.C: New test. Added: trunk/gcc/testsuite/g++.dg/warn/Wunused-parm-4.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/cvt.c trunk/gcc/testsuite/ChangeLog ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c++/47783] [4.6 Regression] Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk ` (4 preceding siblings ...) 2011-02-17 20:49 ` jakub at gcc dot gnu.org @ 2011-02-17 20:53 ` jakub at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: jakub at gcc dot gnu.org @ 2011-02-17 20:53 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47783 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-02-17 20:48:05 UTC --- Fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2011-02-17 20:48 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-02-17 14:32 [Bug c++/47783] New: Warning 'set but not used' [-Wunused-but-set-parameter] incorrectly issued for update through reference wrapper dev.lists at jessamine dot co.uk 2011-02-17 14:56 ` [Bug c++/47783] [4.6 Regression] " redi at gcc dot gnu.org 2011-02-17 15:39 ` rguenth at gcc dot gnu.org 2011-02-17 15:50 ` paolo.carlini at oracle dot com 2011-02-17 17:56 ` jakub at gcc dot gnu.org 2011-02-17 20:49 ` jakub at gcc dot gnu.org 2011-02-17 20:53 ` jakub at gcc dot gnu.org
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