Is it legal to pass a newly constructed object by reference to a function?

Question

Specifically, is the following legal C++?

class A{};

void foo(A*);
void bar(const A&);

int main(void)
{
    foo(&A());  // 1
    bar(A());  // 2
}

It a

Answer 1

It looked lke it would work, but it did not compile with g++ with the Wall option, here is what I get:

michael@hardy-lenovo:~/Desktop$ g++ -Wall a.cpp
a.cpp: In function ‘int main()’:michael@hardy-lenovo:~/Desktop$ g++ -Wall a.cpp
a.cpp: In function ‘int main()’:
a.cpp:8: warning: taking address of temporary
a.cpp:9: error: invalid initialization of non-const reference of type ‘A&’ from a temporary of type ‘A’
a.cpp:4: error: in passing argument 1 of ‘void bar(A&)’
michael@hardy-lenovo:~/Desktop$ 

Looks like you will need to use a constant reference.