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* [Bug c++/100992] New: Wrong result for is_constructible for const ref of tuple of tuples
@ 2021-06-09 13:45 kirshamir at gmail dot com
2021-06-09 14:39 ` [Bug libstdc++/100992] " redi at gcc dot gnu.org
2021-06-09 15:15 ` kirshamir at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: kirshamir at gmail dot com @ 2021-06-09 13:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100992
Bug ID: 100992
Summary: Wrong result for is_constructible for const ref of
tuple of tuples
Product: gcc
Version: 11.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: kirshamir at gmail dot com
CC: kirshamir at gmail dot com
Target Milestone: ---
The second static_assert below fails, should pass:
#include <tuple>
struct F {
F() { }
F(const std::tuple<F>& foo) {}
};
static_assert(std::is_constructible_v<F, const std::tuple<F>&>);
static_assert(std::is_constructible_v<F, const std::tuple<std::tuple<F>>&>); //
fails, unjustifiably
int main() {
F f1{std::tuple{F{}}};
auto tup = std::tuple{std::tuple{f1}};
F f2{tup}; // constructible
}
https://godbolt.org/z/3KfbxfhWE
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libstdc++/100992] Wrong result for is_constructible for const ref of tuple of tuples
2021-06-09 13:45 [Bug c++/100992] New: Wrong result for is_constructible for const ref of tuple of tuples kirshamir at gmail dot com
@ 2021-06-09 14:39 ` redi at gcc dot gnu.org
2021-06-09 15:15 ` kirshamir at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2021-06-09 14:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100992
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Component|c++ |libstdc++
Last reconfirmed| |2021-06-09
Status|UNCONFIRMED |NEW
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is a dup
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libstdc++/100992] Wrong result for is_constructible for const ref of tuple of tuples
2021-06-09 13:45 [Bug c++/100992] New: Wrong result for is_constructible for const ref of tuple of tuples kirshamir at gmail dot com
2021-06-09 14:39 ` [Bug libstdc++/100992] " redi at gcc dot gnu.org
@ 2021-06-09 15:15 ` kirshamir at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: kirshamir at gmail dot com @ 2021-06-09 15:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100992
--- Comment #2 from Amir Kirsh <kirshamir at gmail dot com> ---
Maybe a dup of:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96592
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-06-09 13:45 [Bug c++/100992] New: Wrong result for is_constructible for const ref of tuple of tuples kirshamir at gmail dot com
2021-06-09 14:39 ` [Bug libstdc++/100992] " redi at gcc dot gnu.org
2021-06-09 15:15 ` kirshamir at gmail dot com
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