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* [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous"
@ 2020-06-22 6:43 haoxintu at gmail dot com
2020-06-25 12:16 ` [Bug c++/95809] " redi at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: haoxintu at gmail dot com @ 2020-06-22 6:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
Bug ID: 95809
Summary: GCC treats inline namespace declaration as "ambiguous"
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
Target Milestone: ---
This code, bug.cc, GCC fails to compile it, while clang, icc, or msvc accepts
it well.
$cat bug.cc
namespace g_namespace {}
inline namespace {
namespace g_namespace {}
}
namespace g_namespace {}
$g++ -c bug.cc
bug.cc:5:12: error: ‘namespace g_namespace’ is ambiguous
5 | namespace g_namespace {}
| ^~~~~~~~~~~
bug.cc:3:15: note: candidates are: ‘namespace <unnamed>::g_namespace { }’
3 | namespace g_namespace {}
| ^~~~~~~~~~~
bug.cc:1:11: note: ‘namespace g_namespace { }’
1 | namespace g_namespace {}
| ^~~~~~~~~~~
My GCC version is
g++ (GCC) 11.0.0 20200605 (experimental)
Copyright (C) 2020 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.
When I remove the keyword "inline", GCC accepts it well. So, I guess GCC might
can not detect the inline namespace declaration and separate its inside
namespace from outside ones.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/95809] GCC treats inline namespace declaration as "ambiguous"
2020-06-22 6:43 [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous" haoxintu at gmail dot com
@ 2020-06-25 12:16 ` redi at gcc dot gnu.org
2020-06-25 13:44 ` nathan at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: redi at gcc dot gnu.org @ 2020-06-25 12:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This changed with r248521
Implement DR2061
gcc/
Implement DR2061
* name-lookup.c (push_inline_namespaces): New.
(push_namespace): Look inside inline namespaces.
testsuite/
* g++.dg/cpp0x/dr2061.C: New.
* g++.dg/parse/namespace-alias-1.C: Add more test.
I'm not sure the code is valid, but I'll let Nathan comment.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/95809] GCC treats inline namespace declaration as "ambiguous"
2020-06-22 6:43 [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous" haoxintu at gmail dot com
2020-06-25 12:16 ` [Bug c++/95809] " redi at gcc dot gnu.org
@ 2020-06-25 13:44 ` nathan at gcc dot gnu.org
2020-06-26 9:47 ` haoxintu at gmail dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: nathan at gcc dot gnu.org @ 2020-06-25 13:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
yup, dr2061 made that ill-formed.
p1701 (wg21.link/p1701) documents the behaviour and it appears EWG is exploring
another avenue to resolve the underlying problem 2061 was attempting to fix.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/95809] GCC treats inline namespace declaration as "ambiguous"
2020-06-22 6:43 [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous" haoxintu at gmail dot com
2020-06-25 12:16 ` [Bug c++/95809] " redi at gcc dot gnu.org
2020-06-25 13:44 ` nathan at gcc dot gnu.org
@ 2020-06-26 9:47 ` haoxintu at gmail dot com
2020-06-26 13:16 ` nathan at gcc dot gnu.org
2021-12-14 5:01 ` [Bug c++/95809] [DR2061]GCC " pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: haoxintu at gmail dot com @ 2020-06-26 9:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
--- Comment #3 from Haoxin Tu <haoxintu at gmail dot com> ---
(In reply to Nathan Sidwell from comment #2)
> yup, dr2061 made that ill-formed.
>
> p1701 (wg21.link/p1701) documents the behaviour and it appears EWG is
> exploring another avenue to resolve the underlying problem 2061 was
> attempting to fix.
Thank you, Nathan, so this is a valid code, right?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/95809] GCC treats inline namespace declaration as "ambiguous"
2020-06-22 6:43 [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous" haoxintu at gmail dot com
` (2 preceding siblings ...)
2020-06-26 9:47 ` haoxintu at gmail dot com
@ 2020-06-26 13:16 ` nathan at gcc dot gnu.org
2021-12-14 5:01 ` [Bug c++/95809] [DR2061]GCC " pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: nathan at gcc dot gnu.org @ 2020-06-26 13:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
The code is invalid due to DR2061
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/95809] [DR2061]GCC treats inline namespace declaration as "ambiguous"
2020-06-22 6:43 [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous" haoxintu at gmail dot com
` (3 preceding siblings ...)
2020-06-26 13:16 ` nathan at gcc dot gnu.org
@ 2021-12-14 5:01 ` pinskia at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-14 5:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95809
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Alias| |cwg2061
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Invalid as explained.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-12-14 5:01 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-06-22 6:43 [Bug c++/95809] New: GCC treats inline namespace declaration as "ambiguous" haoxintu at gmail dot com
2020-06-25 12:16 ` [Bug c++/95809] " redi at gcc dot gnu.org
2020-06-25 13:44 ` nathan at gcc dot gnu.org
2020-06-26 9:47 ` haoxintu at gmail dot com
2020-06-26 13:16 ` nathan at gcc dot gnu.org
2021-12-14 5:01 ` [Bug c++/95809] [DR2061]GCC " pinskia at gcc dot gnu.org
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