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* [Bug c++/85270] Trivial assignment operator not considered such
[not found] <bug-85270-4@http.gcc.gnu.org/bugzilla/>
@ 2020-06-09 18:04 ` mpolacek at gcc dot gnu.org
2021-12-28 10:05 ` pinskia at gcc dot gnu.org
2023-03-14 9:50 ` redi at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-06-09 18:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85270
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This should probably compile too:
struct S {
S &operator=(const S &) & = default; // trivial
S &operator=(const S &) && { return *this; } // non-trivial
};
struct R {
S foo;
};
static_assert(__is_trivially_assignable (S &, const S &));
static_assert(__is_trivially_assignable (R &, const R &));
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/85270] Trivial assignment operator not considered such
[not found] <bug-85270-4@http.gcc.gnu.org/bugzilla/>
2020-06-09 18:04 ` [Bug c++/85270] Trivial assignment operator not considered such mpolacek at gcc dot gnu.org
@ 2021-12-28 10:05 ` pinskia at gcc dot gnu.org
2023-03-14 9:50 ` redi at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-28 10:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85270
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-12-28
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=59426
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/85270] Trivial assignment operator not considered such
[not found] <bug-85270-4@http.gcc.gnu.org/bugzilla/>
2020-06-09 18:04 ` [Bug c++/85270] Trivial assignment operator not considered such mpolacek at gcc dot gnu.org
2021-12-28 10:05 ` pinskia at gcc dot gnu.org
@ 2023-03-14 9:50 ` redi at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2023-03-14 9:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85270
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=87051
Last reconfirmed|2021-12-28 00:00:00 |2023-3-14
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This breaks std::tuple<> due to new assignment operators in C++23:
https://godbolt.org/z/9EdPrdjhW
#include <type_traits>
template <class...> struct tuple;
template <>
struct tuple<> {
tuple() = default;
~tuple() = default;
tuple(const tuple&) = default;
tuple(tuple&&) = default;
tuple& operator=(const tuple&) = default;
tuple& operator=(tuple&&) = default;
constexpr const tuple& operator=(const tuple&) const noexcept { return
*this; }
constexpr const tuple& operator=(tuple&&) const noexcept { return *this; }
};
static_assert(std::is_trivially_destructible_v<tuple<>>);
static_assert(std::is_trivially_default_constructible_v<tuple<>>);
static_assert(std::is_trivially_copy_constructible_v<tuple<>>);
static_assert(std::is_trivially_move_constructible_v<tuple<>>);
static_assert(std::is_trivially_copy_assignable_v<tuple<>>);
static_assert(std::is_trivially_move_assignable_v<tuple<>>);
static_assert(!std::is_trivially_copyable_v<tuple<>>);
<source>:23:20: error: static assertion failed
23 | static_assert(std::is_trivially_copy_assignable_v<tuple<>>);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<source>:24:20: error: static assertion failed
24 | static_assert(std::is_trivially_move_assignable_v<tuple<>>);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Compiler returned: 1
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-03-14 9:50 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-85270-4@http.gcc.gnu.org/bugzilla/>
2020-06-09 18:04 ` [Bug c++/85270] Trivial assignment operator not considered such mpolacek at gcc dot gnu.org
2021-12-28 10:05 ` pinskia at gcc dot gnu.org
2023-03-14 9:50 ` redi at gcc dot gnu.org
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