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* [Bug c++/99628] New: g++ fails to do the implicit conversion when rewritten operator<=>
@ 2021-03-17 15:18 hewillk at gmail dot com
2021-08-13 0:10 ` [Bug c++/99628] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: hewillk at gmail dot com @ 2021-03-17 15:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99628
Bug ID: 99628
Summary: g++ fails to do the implicit conversion when rewritten
operator<=>
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hewillk at gmail dot com
Target Milestone: ---
gcc-trunk rejects this valid code:
struct S{
operator int() { return 0; }
};
auto operator<=>(S, S) { return S{}; }
int main() {
return S{} < S{};
}
(godbolt://godbolt.org/z/9ah1xE)
The expression S{} < S{} would be rewritten as (S{} <=> S{}) < 0, since the
(S{} <=> S{}) return S{}, we compare S{} with 0, and S{} explicit convert to 0,
so we compare 0 < 0 which is false, but gcc-trunk rejects with:
<source>:8:14: error: no match for 'operator<' (operand types are 'S' and
'int')
8 | return S{} < S{};
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/99628] g++ fails to do the implicit conversion when rewritten operator<=>
2021-03-17 15:18 [Bug c++/99628] New: g++ fails to do the implicit conversion when rewritten operator<=> hewillk at gmail dot com
@ 2021-08-13 0:10 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-13 0:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99628
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-08-13
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-03-17 15:18 [Bug c++/99628] New: g++ fails to do the implicit conversion when rewritten operator<=> hewillk at gmail dot com
2021-08-13 0:10 ` [Bug c++/99628] " pinskia at gcc dot gnu.org
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