Copy Elision for temporaries not working

[JUANDENT]

According to C++ 17, the following code should compile:

class MyClass
{
public:
	MyClass(const MyClass&) = delete;
	MyClass(MyClass&&) = delete;
	
};

void foo( MyClass param)
{
	
}

MyClass bar()
{
	return MyClass{};
}


namespace CopyElision
{
	void main()
	{
		foo(MyClass{});
		MyClass x = bar();
		foo(bar());
	}
}

but it complains about calling deleted functions (copy and move ctors)...

This is with Visual Studio 2019 version 16.6.2


Is it a compiler not up to date issue or is the code above illegal?


Regards,
Juan Dent

[helios]

Both GCC and Clang accept the program with -std=c++17.

[JUANDENT]

Ok so it is the compiler not quite at C++17!

Thanks,
Juan

[jlb]

You should also be getting some warnings about your main() function.

The function main() must be defined to return an int, and it must be in the global namespace.