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* [Bug c++/113154] New: std::views::values not working with rvalue references to ranges
@ 2023-12-27 2:35 ivan.lazaric.gcc at gmail dot com
2023-12-27 2:57 ` [Bug libstdc++/113154] [11 only] " pinskia at gcc dot gnu.org
2023-12-28 1:10 ` redi at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: ivan.lazaric.gcc at gmail dot com @ 2023-12-27 2:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113154
Bug ID: 113154
Summary: std::views::values not working with rvalue references
to ranges
Product: gcc
Version: 11.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ivan.lazaric.gcc at gmail dot com
Target Milestone: ---
https://godbolt.org/z/a3c4P9sY6
```
#include <ranges>
#include <map>
void fn(){
std::map<int, int> m;
m | std::views::values; // works
std::map<int, int>{} | std::views::values; // does not work
}
```
not an issue in newer versions, checked 13.2 and it worked
came across this by wanting to do:
```
std::map<Keys, Values> produce_map();
std::cout << std::ranges::max(produce_map | std::views::values) << std::endl;
```
options used: -std=c++20 -O3
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libstdc++/113154] [11 only] std::views::values not working with rvalue references to ranges
2023-12-27 2:35 [Bug c++/113154] New: std::views::values not working with rvalue references to ranges ivan.lazaric.gcc at gmail dot com
@ 2023-12-27 2:57 ` pinskia at gcc dot gnu.org
2023-12-28 1:10 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-12-27 2:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113154
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.5
Summary|std::views::values not |[11 only]
|working with rvalue |std::views::values not
|references to ranges |working with rvalue
| |references to ranges
Keywords| |needs-bisection
Component|c++ |libstdc++
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I doubt, the patch which fixed this can/will be backported to the GCC 11
releases.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libstdc++/113154] [11 only] std::views::values not working with rvalue references to ranges
2023-12-27 2:35 [Bug c++/113154] New: std::views::values not working with rvalue references to ranges ivan.lazaric.gcc at gmail dot com
2023-12-27 2:57 ` [Bug libstdc++/113154] [11 only] " pinskia at gcc dot gnu.org
@ 2023-12-28 1:10 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2023-12-28 1:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113154
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> I doubt, the patch which fixed this can/will be backported to the GCC 11
> releases.
Right. GCC 11 is correct according to the C++20 standard, but the semantics
were changed after the C++20 standard was published. That was implemented in
GCC with:
commit 5e1b17f038671df1a6580ece4cd58ef91cc1e234
Author: Patrick Palka
Date: Tue Feb 22 09:37:58 2022 -0500
libstdc++: Implement P2415R2 changes to viewable_range / views::all
This implements the wording changes in P2415R2 "What is a view?", which
is a DR for C++20.
I don't think we want to backport it.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-12-28 1:11 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2023-12-27 2:35 [Bug c++/113154] New: std::views::values not working with rvalue references to ranges ivan.lazaric.gcc at gmail dot com
2023-12-27 2:57 ` [Bug libstdc++/113154] [11 only] " pinskia at gcc dot gnu.org
2023-12-28 1:10 ` redi at gcc dot gnu.org
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