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* [Bug c++/64259] New: Erroneous "declaration 'struct ...' does not declare anything" when using "typename"
@ 2014-12-11 0:37 rutsky.vladimir at gmail dot com
2014-12-11 10:36 ` [Bug c++/64259] " redi at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: rutsky.vladimir at gmail dot com @ 2014-12-11 0:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64259
Bug ID: 64259
Summary: Erroneous "declaration 'struct ...' does not declare
anything" when using "typename"
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rutsky.vladimir at gmail dot com
Consider following example:
$ cat /tmp/test.cpp
class A;
namespace details
{
struct B {};
}
using BB = typename details::B;
$ g++-4.9 -std=c++11 -c /tmp/test.cpp
/tmp/test.cpp:8:30: warning: declaration 'struct details::B' does not declare
anything
using BB = typename details::B;
^
$ g++-4.9 --version
g++-4.9 (Ubuntu 4.9.2-0ubuntu1~14.04) 4.9.2
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Code compiles without warnings with clang 3.5.
If I remove (uneeded) typename:
using BB = details::B;
code compiles with GCC without warnings.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/64259] Erroneous "declaration 'struct ...' does not declare anything" when using "typename"
2014-12-11 0:37 [Bug c++/64259] New: Erroneous "declaration 'struct ...' does not declare anything" when using "typename" rutsky.vladimir at gmail dot com
@ 2014-12-11 10:36 ` redi at gcc dot gnu.org
2020-03-12 18:41 ` mpolacek at gcc dot gnu.org
2021-08-04 3:26 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: redi at gcc dot gnu.org @ 2014-12-11 10:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64259
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-12-11
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed. Every version since 4.7.0 has given the same warning (but not a
regression as 4.6 didn't support the syntax at all).
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/64259] Erroneous "declaration 'struct ...' does not declare anything" when using "typename"
2014-12-11 0:37 [Bug c++/64259] New: Erroneous "declaration 'struct ...' does not declare anything" when using "typename" rutsky.vladimir at gmail dot com
2014-12-11 10:36 ` [Bug c++/64259] " redi at gcc dot gnu.org
@ 2020-03-12 18:41 ` mpolacek at gcc dot gnu.org
2021-08-04 3:26 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-03-12 18:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64259
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
GCC 10 still prints the warning:
64259.C:8:30: warning: declaration ‘struct details::B’ does not declare
anything
8 | using BB = typename details::B;
| ^
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/64259] Erroneous "declaration 'struct ...' does not declare anything" when using "typename"
2014-12-11 0:37 [Bug c++/64259] New: Erroneous "declaration 'struct ...' does not declare anything" when using "typename" rutsky.vladimir at gmail dot com
2014-12-11 10:36 ` [Bug c++/64259] " redi at gcc dot gnu.org
2020-03-12 18:41 ` mpolacek at gcc dot gnu.org
@ 2021-08-04 3:26 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-04 3:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64259
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.0
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 66159 which is fixed in GCC 11+.
*** This bug has been marked as a duplicate of bug 66159 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-08-04 3:26 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-12-11 0:37 [Bug c++/64259] New: Erroneous "declaration 'struct ...' does not declare anything" when using "typename" rutsky.vladimir at gmail dot com
2014-12-11 10:36 ` [Bug c++/64259] " redi at gcc dot gnu.org
2020-03-12 18:41 ` mpolacek at gcc dot gnu.org
2021-08-04 3:26 ` pinskia at gcc dot gnu.org
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