https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107797
Bug ID: 107797
Summary: "warning right operand of comma operator has no
effect" for expressions with no comma operator
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
int main() {
(long)new int{};
long(new int{});
}
With -Wall this gives:
comma.cc: In function ‘int main()’:
comma.cc:2:20: warning: right operand of comma operator has no effect
[-Wunused-value]
2 | (long)new int{};
| ^
comma.cc:3:20: warning: right operand of comma operator has no effect
[-Wunused-value]
3 | long(new int{});
| ^
There is no comma operator in the code.
The bogus warning has been there since at least 6.1
