Does binding temporary to a reference require a copy constructor in C++?
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Published on 2012-12-16T04:59:49Z
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2012/12/16
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Consider the following code:
class A {
A(const A&);
public:
A() {}
};
int main() {
const A &a = A();
}
This code compiles fine with GCC, but fails to compile with Visual C++ with the following error:
test.cc(8) : error C2248: 'A::A' : cannot access private member declared in class 'A'
test.cc(2) : see declaration of 'A::A'
test.cc(1) : see declaration of 'A'
So is it necessary to have a copy constructor accessible when binding a temporary to a reference?
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