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* [Bug c++/24668] New: visibility attributes on namespaces @ 2005-11-04 6:54 bkoz at gcc dot gnu dot org 2005-11-04 6:56 ` [Bug c++/24668] " bkoz at gcc dot gnu dot org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: bkoz at gcc dot gnu dot org @ 2005-11-04 6:54 UTC (permalink / raw) To: gcc-bugs In addition to the current ability to put visibility attributes on file and class scope, the ability to put visibility attributes on namespace scope is desired. The syntax is straight forward extension of existing visibility attribute options. namespace test __attribute__ ((visibility("hidden"))) { struct c1 { static int s; virtual void foo() { } }; int c1::s; } Is an example. What does this mean? For definitions within namespace scope, set the symbol visibility to the nearest enclosing namespace attribute. Declarations are unaffected. Nested namespaces have the same semantics as nested classes. Ie, enclosing scope. Therefore: #define VIS_default __attribute__ ((visibility("default"))) #define VIS_hidden __attribute__ ((visibility("hidden"))) struct c1 { static int s; virtual void foo() { } struct c2 { static int s; virtual void foo() { } } VIS_default; } VIS_hidden; namespace test1 VIS_hidden { struct c1 { static int s; virtual void foo() { } }; int c1::s; namespace test2 VIS_default { struct c2 { static int s; virtual void foo() { } }; int c2::s; } } In the above, struct c2 and test1::test2::c2 both have default visibility, whereas c1 and test1::c1 both have hidden visibility. Interactions between file, namespace, and class scope are handled sanely. Ie, the same deal, nearest enclosing scope. ie: #pragma GCC visibility push(hidden) namespace test1 VIS_default { struct c1 { static int s; virtual void foo() { } }; int c1::s; struct c2 { static int s; virtual void foo() { } } VIS_hidden; int c2::s; } #pragma GCC visibility pop In the above, c1 would be default, c2 would be hidden. -- Summary: visibility attributes on namespaces Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: bkoz at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24668 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/24668] visibility attributes on namespaces 2005-11-04 6:54 [Bug c++/24668] New: visibility attributes on namespaces bkoz at gcc dot gnu dot org @ 2005-11-04 6:56 ` bkoz at gcc dot gnu dot org 2005-11-04 11:06 ` pluto at agmk dot net ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: bkoz at gcc dot gnu dot org @ 2005-11-04 6:56 UTC (permalink / raw) To: gcc-bugs -- bkoz at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24668 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/24668] visibility attributes on namespaces 2005-11-04 6:54 [Bug c++/24668] New: visibility attributes on namespaces bkoz at gcc dot gnu dot org 2005-11-04 6:56 ` [Bug c++/24668] " bkoz at gcc dot gnu dot org @ 2005-11-04 11:06 ` pluto at agmk dot net 2005-11-04 13:05 ` pinskia at gcc dot gnu dot org 2005-11-04 17:06 ` bkoz at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pluto at agmk dot net @ 2005-11-04 11:06 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from pluto at agmk dot net 2005-11-04 11:06 ------- what about PR21764 (linked in PR19664)? duplication? -- pluto at agmk dot net changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pluto at agmk dot net http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24668 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/24668] visibility attributes on namespaces 2005-11-04 6:54 [Bug c++/24668] New: visibility attributes on namespaces bkoz at gcc dot gnu dot org 2005-11-04 6:56 ` [Bug c++/24668] " bkoz at gcc dot gnu dot org 2005-11-04 11:06 ` pluto at agmk dot net @ 2005-11-04 13:05 ` pinskia at gcc dot gnu dot org 2005-11-04 17:06 ` bkoz at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu dot org @ 2005-11-04 13:05 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from pinskia at gcc dot gnu dot org 2005-11-04 13:05 ------- This is a dup of bug 21764 as far as I can see. *** This bug has been marked as a duplicate of 21764 *** -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |DUPLICATE http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24668 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/24668] visibility attributes on namespaces 2005-11-04 6:54 [Bug c++/24668] New: visibility attributes on namespaces bkoz at gcc dot gnu dot org ` (2 preceding siblings ...) 2005-11-04 13:05 ` pinskia at gcc dot gnu dot org @ 2005-11-04 17:06 ` bkoz at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: bkoz at gcc dot gnu dot org @ 2005-11-04 17:06 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from bkoz at gcc dot gnu dot org 2005-11-04 17:06 ------- Agh. Sorry, I had not realized that I'd filed this six months ago. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24668 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-11-04 17:06 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2005-11-04 6:54 [Bug c++/24668] New: visibility attributes on namespaces bkoz at gcc dot gnu dot org 2005-11-04 6:56 ` [Bug c++/24668] " bkoz at gcc dot gnu dot org 2005-11-04 11:06 ` pluto at agmk dot net 2005-11-04 13:05 ` pinskia at gcc dot gnu dot org 2005-11-04 17:06 ` bkoz at gcc dot gnu dot org
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