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* [Bug c++/102236] New: emplace_deref is not constexpr for join_view
@ 2021-09-07 23:20 barry.revzin at gmail dot com
2021-09-08 2:25 ` [Bug c++/102236] " hewillk at gmail dot com
2021-09-08 7:42 ` rguenth at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: barry.revzin at gmail dot com @ 2021-09-07 23:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102236
Bug ID: 102236
Summary: emplace_deref is not constexpr for join_view
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: barry.revzin at gmail dot com
Target Milestone: ---
For instance:
#include <ranges>
constexpr std::string_view first_n_words(std::string_view str, size_t n) {
namespace rv = std::views;
auto first_n = str
| rv::split(' ')
| rv::take(n)
| rv::join;
return std::string_view(&*first_n.begin(), std::ranges::distance(first_n));
}
constexpr std::string_view first4 = first_n_words("Hello to all you beautiful
libstdc++ developers", 4);
This doesn't compile because _M_emplace_deref isn't marked constexpr (probably
becase P2231 isn't implemented yet, but thought I'd file a bug report anyway).
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/102236] emplace_deref is not constexpr for join_view
2021-09-07 23:20 [Bug c++/102236] New: emplace_deref is not constexpr for join_view barry.revzin at gmail dot com
@ 2021-09-08 2:25 ` hewillk at gmail dot com
2021-09-08 7:42 ` rguenth at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: hewillk at gmail dot com @ 2021-09-08 2:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102236
康桓瑋 <hewillk at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hewillk at gmail dot com
--- Comment #1 from 康桓瑋 <hewillk at gmail dot com> ---
This is obviously a dup of PR101263 ;-)
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/102236] emplace_deref is not constexpr for join_view
2021-09-07 23:20 [Bug c++/102236] New: emplace_deref is not constexpr for join_view barry.revzin at gmail dot com
2021-09-08 2:25 ` [Bug c++/102236] " hewillk at gmail dot com
@ 2021-09-08 7:42 ` rguenth at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-09-08 7:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102236
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 101263 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-09-07 23:20 [Bug c++/102236] New: emplace_deref is not constexpr for join_view barry.revzin at gmail dot com
2021-09-08 2:25 ` [Bug c++/102236] " hewillk at gmail dot com
2021-09-08 7:42 ` rguenth at gcc dot gnu.org
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