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* [Bug c++/110707] New: unused-but-set-variable in static lambda with deduced parameter
@ 2023-07-17 19:59 chris0cotter at gmail dot com
2024-03-24 18:16 ` [Bug c++/110707] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: chris0cotter at gmail dot com @ 2023-07-17 19:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110707
Bug ID: 110707
Summary: unused-but-set-variable in static lambda with deduced
parameter
Product: gcc
Version: 13.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: chris0cotter at gmail dot com
Target Milestone: ---
With GCC-13.1 using `-std=c++20 -Wall`, the following code causes an
unused-but-set-variable warning for `f1` being unused.
https://godbolt.org/z/5vfEd7vr5
int foo() {
static auto f1 = [](int a) { return a;}; // warning: variable 'f1' set but
not used [-Wunused-but-set-variable]
static auto f2 = [](auto s) -> int { return f1(s); };
return f2(0);
}
The warning disappears if I replace `auto s` with `int s`, or if I remove the
return type from the second lambda ` -> int`.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/110707] unused-but-set-variable in static lambda with deduced parameter
2023-07-17 19:59 [Bug c++/110707] New: unused-but-set-variable in static lambda with deduced parameter chris0cotter at gmail dot com
@ 2024-03-24 18:16 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-03-24 18:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110707
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-03-24
Ever confirmed|0 |1
--- 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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2023-07-17 19:59 [Bug c++/110707] New: unused-but-set-variable in static lambda with deduced parameter chris0cotter at gmail dot com
2024-03-24 18:16 ` [Bug c++/110707] " pinskia at gcc dot gnu.org
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