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* [Bug c++/115377] New: Invalid typename with non nested-name-specifier accepted in specific contexts
@ 2024-06-06 20:54 luigighiron at gmail dot com
2024-06-06 20:59 ` [Bug c++/115377] " pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: luigighiron at gmail dot com @ 2024-06-06 20:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115377
Bug ID: 115377
Summary: Invalid typename with non nested-name-specifier
accepted in specific contexts
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: luigighiron at gmail dot com
Target Milestone: ---
GCC will accept some invalid uses of typename, for example:
#include<iostream>
using V=int;
int main(){
typename V=42;
std::cout<<V<<'\n';
}
Here, it seems like GCC is interpreting the V as being both the type of the
thing declared and the thing that is being declared. Note that trying to give a
different name e.g. typename V v=42; causes GCC to give an error about
expecting a nested-name-specifier. Here are some more examples to demonstrate
the bug:
#include<iostream>
using V=int;
int main(){
typename const V[2]=std::cout;
typename(*V)[V?V,V:V](V){nullptr};
typename random[main];
}
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/115377] Invalid typename with non nested-name-specifier accepted in specific contexts
2024-06-06 20:54 [Bug c++/115377] New: Invalid typename with non nested-name-specifier accepted in specific contexts luigighiron at gmail dot com
@ 2024-06-06 20:59 ` pinskia at gcc dot gnu.org
2024-06-06 21:04 ` [Bug c++/115377] [11/12/13/14/15 Regression] " pinskia at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-06-06 20:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115377
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> typename V=42;
It is treating it as int.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/115377] [11/12/13/14/15 Regression] Invalid typename with non nested-name-specifier accepted in specific contexts
2024-06-06 20:54 [Bug c++/115377] New: Invalid typename with non nested-name-specifier accepted in specific contexts luigighiron at gmail dot com
2024-06-06 20:59 ` [Bug c++/115377] " pinskia at gcc dot gnu.org
@ 2024-06-06 21:04 ` pinskia at gcc dot gnu.org
2024-06-17 11:29 ` [Bug c++/115377] [11/12/13/14/15 Regression] Invalid typename with non nested-name-specifier accepted in specific contexts since r5-2683 jakub at gcc dot gnu.org
2024-06-17 19:32 ` mpolacek at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-06-06 21:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115377
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.8.5, 4.9.4
Target Milestone|--- |11.5
Last reconfirmed| |2024-06-06
Status|UNCONFIRMED |NEW
Summary|Invalid typename with non |[11/12/13/14/15 Regression]
|nested-name-specifier |Invalid typename with non
|accepted in specific |nested-name-specifier
|contexts |accepted in specific
| |contexts
Known to fail| |5.1.0
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/115377] [11/12/13/14/15 Regression] Invalid typename with non nested-name-specifier accepted in specific contexts since r5-2683
2024-06-06 20:54 [Bug c++/115377] New: Invalid typename with non nested-name-specifier accepted in specific contexts luigighiron at gmail dot com
2024-06-06 20:59 ` [Bug c++/115377] " pinskia at gcc dot gnu.org
2024-06-06 21:04 ` [Bug c++/115377] [11/12/13/14/15 Regression] " pinskia at gcc dot gnu.org
@ 2024-06-17 11:29 ` jakub at gcc dot gnu.org
2024-06-17 19:32 ` mpolacek at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jakub at gcc dot gnu.org @ 2024-06-17 11:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115377
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org,
| |ppalka at gcc dot gnu.org
Summary|[11/12/13/14/15 Regression] |[11/12/13/14/15 Regression]
|Invalid typename with non |Invalid typename with non
|nested-name-specifier |nested-name-specifier
|accepted in specific |accepted in specific
|contexts |contexts since r5-2683
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is accepted since r5-2683-g215acd2bae70e5ae9cbe68bdaa150a9215722310
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/115377] [11/12/13/14/15 Regression] Invalid typename with non nested-name-specifier accepted in specific contexts since r5-2683
2024-06-06 20:54 [Bug c++/115377] New: Invalid typename with non nested-name-specifier accepted in specific contexts luigighiron at gmail dot com
` (2 preceding siblings ...)
2024-06-17 11:29 ` [Bug c++/115377] [11/12/13/14/15 Regression] Invalid typename with non nested-name-specifier accepted in specific contexts since r5-2683 jakub at gcc dot gnu.org
@ 2024-06-17 19:32 ` mpolacek at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2024-06-17 19:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115377
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch thread: https://gcc.gnu.org/pipermail/gcc-patches/2014-August/395789.html
The patch doesn't seem to match what was actually committed?
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-06-17 19:32 UTC | newest]
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2024-06-06 20:54 [Bug c++/115377] New: Invalid typename with non nested-name-specifier accepted in specific contexts luigighiron at gmail dot com
2024-06-06 20:59 ` [Bug c++/115377] " pinskia at gcc dot gnu.org
2024-06-06 21:04 ` [Bug c++/115377] [11/12/13/14/15 Regression] " pinskia at gcc dot gnu.org
2024-06-17 11:29 ` [Bug c++/115377] [11/12/13/14/15 Regression] Invalid typename with non nested-name-specifier accepted in specific contexts since r5-2683 jakub at gcc dot gnu.org
2024-06-17 19:32 ` mpolacek at gcc dot gnu.org
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