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#include <iostream>
 
int func(){ return 0; }
struct Foo{};
 
struct Bar
{
	Bar(){ std::cout << "default ctor" << std::endl; } 
	Bar(Bar const&){ std::cout << "copy ctor" << std::endl; }
	Bar(Bar&&){ std::cout << "move ctor" << std::endl; }
	Bar&operator=(Bar const&){ std::cout << "copy subst" << std::endl; return *this; }
	Bar&operator=(Bar&&){ std::cout << "move subst" << std::endl; return *this; }
};
 
struct Baz
{
	void f(Foo const&){ std::cout << "lvalue ref" << std::endl; }
	void f(Foo&&) { std::cout << "rvalue ref" << std::endl; }
 
	void g() &  { std::cout << "lvalue overload" << std::endl; }
	void g() && { std::cout << "rvalue overload" << std::endl; }
};
 
int main(int,char*[])
{
	int x = 1;
	Foo foo{};
 
	x;  // lvalue
	1;  // rvalue(prvalue)
 
	func(); // rvalue(prvalue)
 
	foo;    // lvalue
	Foo{};  // rvalue(prvalue)
 
	// lvalue reference
	int& lr1 = x; 
	// int& lr2 = 1; // ERROR
 
	// const lvalue reference
	int const& clr1 = x;
	int const& clr2 = 1;
 
	// rvalue reference
	// int&& rr1 = x; // ERROR
	int&& rr2 = 1;
 
	// const rvalue reference
	// int const&& crr1 = x; // ERROR
	int const&& crr2 = 1;
 
	// move
	// int & lr3 = std::move(x); // ERROR
	int && rr3 = std::move(x); // xrvalue
 
 
	std::cout << "1: "; Bar b1{};
	std::cout << "2: "; Bar b2(b1);
	std::cout << "3: "; Bar b3(Bar{});
	std::cout << "4: "; Bar b4(std::move(b3));
 
	std::cout << "5: "; b1 = b2;
	std::cout << "6: "; b1 = Bar{};
	std::cout << "7: "; b1 = std::move(b4);
 
	Baz baz;
	baz.f(foo);
	baz.f(Foo{});
 
	baz.g();
	Baz{}.g();
 
	return 0;
}

prog.cpp:20:9: error: expected ‘;’ at end of member declaration
prog.cpp:20:14: error: expected unqualified-id before ‘{’ token
prog.cpp:20:61: error: expected ‘;’ at end of member declaration
prog.cpp:21:9: error: expected ‘;’ at end of member declaration
prog.cpp:21:7: error: ‘void Baz::g()’ cannot be overloaded
prog.cpp:20:7: error: with ‘void Baz::g()’
prog.cpp:21:14: error: expected unqualified-id before ‘{’ token
prog.cpp:21:61: error: expected ‘;’ at end of member declaration
prog.cpp: In function ‘int main(int, char**)’:
prog.cpp:29:3: warning: statement has no effect [-Wunused-value]
prog.cpp:30:3: warning: statement has no effect [-Wunused-value]
prog.cpp:34:5: warning: statement has no effect [-Wunused-value]
prog.cpp:38:7: warning: unused variable ‘lr1’ [-Wunused-variable]
prog.cpp:42:13: warning: unused variable ‘clr1’ [-Wunused-variable]
prog.cpp:43:13: warning: unused variable ‘clr2’ [-Wunused-variable]
prog.cpp:47:8: warning: unused variable ‘rr2’ [-Wunused-variable]
prog.cpp:51:14: warning: unused variable ‘crr2’ [-Wunused-variable]
prog.cpp:55:9: warning: unused variable ‘rr3’ [-Wunused-variable]

Standard output is empty