https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89976
--- Comment #2 from Nikita Kniazev <nok.raven at gmail dot com> ---
The same warning as when the object is constructed inside the main function:
int main()
{
XorYorZ x;
return x.x;
}
Also, the warning is not triggered in C++17+ mode with:
XorYorZ foo()
{
return XorYorZ();
}
where the guaranteed return value optimization have to happen and the code
must have the same meaning as:
int main()
{
XorYorZ x = XorYorZ();
return x.x;
}
which triggers the warning, and is the same as just `XorYorZ x;` because of
the presence of the user defined constructor in X/Y/Z and copy/move elision.
