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* [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable
@ 2023-03-04 16:03 yronglin777 at gmail dot com
2023-03-06 1:05 ` [Bug libstdc++/109024] " de34 at live dot cn
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: yronglin777 at gmail dot com @ 2023-03-04 16:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109024
Bug ID: 109024
Summary: [C++23][ranges][repeat_view] The default ctor
unuseable
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: yronglin777 at gmail dot com
Target Milestone: ---
The default ctor of std::ranges::repeat_view<int> was unuseable.
https://godbolt.org/z/jxKMxEn7E
[P2474R2] https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2474r2.html
```
repeat_view() requires default_initializable<W> = default;
```
```
#include <ranges>
#include <cassert>
void fn() {
std::ranges::repeat_view<int> v;
}
```
```
In file included from <source>:1:
/opt/compiler-explorer/gcc-trunk-20230304/include/c++/13.0.1/ranges: In
instantiation of 'constexpr std::ranges::repeat_view<_Tp,
_Bound>::repeat_view() requires default_initializable<_Tp> [with _Tp = int;
_Bound = std::unreachable_sentinel_t]':
<source>:5:35: required from here
/opt/compiler-explorer/gcc-trunk-20230304/include/c++/13.0.1/ranges:7395:37:
error: could not convert '0' from 'int' to 'std::ranges::__detail::__box<int>'
7395 | __detail::__box<_Tp> _M_value = _Tp();
| ^~~~~
| |
| int
Compiler returned: 1
```
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/109024] [C++23][ranges][repeat_view] The default ctor unuseable 2023-03-04 16:03 [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable yronglin777 at gmail dot com @ 2023-03-06 1:05 ` de34 at live dot cn 2023-03-06 16:42 ` redi at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: de34 at live dot cn @ 2023-03-06 1:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109024 Jiang An <de34 at live dot cn> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |de34 at live dot cn --- Comment #1 from Jiang An <de34 at live dot cn> --- See https://cplusplus.github.io/LWG/issue3796. We need to implement the resolution. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/109024] [C++23][ranges][repeat_view] The default ctor unuseable 2023-03-04 16:03 [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable yronglin777 at gmail dot com 2023-03-06 1:05 ` [Bug libstdc++/109024] " de34 at live dot cn @ 2023-03-06 16:42 ` redi at gcc dot gnu.org 2023-03-08 15:55 ` ppalka at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: redi at gcc dot gnu.org @ 2023-03-06 16:42 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109024 Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2023-03-06 Ever confirmed|0 |1 Status|UNCONFIRMED |NEW ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/109024] [C++23][ranges][repeat_view] The default ctor unuseable 2023-03-04 16:03 [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable yronglin777 at gmail dot com 2023-03-06 1:05 ` [Bug libstdc++/109024] " de34 at live dot cn 2023-03-06 16:42 ` redi at gcc dot gnu.org @ 2023-03-08 15:55 ` ppalka at gcc dot gnu.org 2023-03-09 18:37 ` cvs-commit at gcc dot gnu.org 2023-03-09 18:38 ` ppalka at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: ppalka at gcc dot gnu.org @ 2023-03-08 15:55 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109024 Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org CC| |ppalka at gcc dot gnu.org Status|NEW |ASSIGNED ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/109024] [C++23][ranges][repeat_view] The default ctor unuseable 2023-03-04 16:03 [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable yronglin777 at gmail dot com ` (2 preceding siblings ...) 2023-03-08 15:55 ` ppalka at gcc dot gnu.org @ 2023-03-09 18:37 ` cvs-commit at gcc dot gnu.org 2023-03-09 18:38 ` ppalka at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2023-03-09 18:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109024 --- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>: https://gcc.gnu.org/g:065c93b89c5e97dcbfd79ee5172cf6800c286896 commit r13-6561-g065c93b89c5e97dcbfd79ee5172cf6800c286896 Author: Patrick Palka <ppalka@redhat.com> Date: Thu Mar 9 13:37:29 2023 -0500 libstdc++: Implement LWG 3796 changes to repeat_/chunk_by_view [PR109024] PR libstdc++/109024 libstdc++-v3/ChangeLog: * include/std/ranges (chunk_by_view::_M_pred): Remove DMI as per LWG 3796. (repeat_view::_M_pred): Likewise. * testsuite/std/ranges/adaptors/chunk_by/1.cc (test03): New test. * testsuite/std/ranges/repeat/1.cc (test05): New test. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/109024] [C++23][ranges][repeat_view] The default ctor unuseable 2023-03-04 16:03 [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable yronglin777 at gmail dot com ` (3 preceding siblings ...) 2023-03-09 18:37 ` cvs-commit at gcc dot gnu.org @ 2023-03-09 18:38 ` ppalka at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: ppalka at gcc dot gnu.org @ 2023-03-09 18:38 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109024 Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Target Milestone|--- |13.0 Resolution|--- |FIXED --- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> --- Fixed, thanks for the bug report. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2023-03-09 18:38 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-03-04 16:03 [Bug libstdc++/109024] New: [C++23][ranges][repeat_view] The default ctor unuseable yronglin777 at gmail dot com 2023-03-06 1:05 ` [Bug libstdc++/109024] " de34 at live dot cn 2023-03-06 16:42 ` redi at gcc dot gnu.org 2023-03-08 15:55 ` ppalka at gcc dot gnu.org 2023-03-09 18:37 ` cvs-commit at gcc dot gnu.org 2023-03-09 18:38 ` ppalka at gcc dot gnu.org
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