Accessing member of non-lvalue union

[Johannes Schaub (litb)]

This seems to be fine according to rules, right? (assuming that we won't
create a trap representation)

union A {
int i;
float d;
};

union A f() {
union A a = { 10 };
return a;
}

int main() {
// note: we don't access an object and don't use lvalues!
float ff = f().d;
}

I wonder whether this is fine.

 

[Ben Bacarisse]

This seems to be fine according to rules, right? (assuming that we won't
create a trap representation)

union A {
int i;
float d;
};

union A f() {
union A a = { 10 };
return a;
}

int main() {
// note: we don't access an object and don't use lvalues!
float ff = f().d;
}

I wonder whether this is fine.

I can't see anything wrong with it.