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namespace std {
typedef unsigned size_t;
template <typename T>
struct unique_ptr {
unique_ptr();
T *get() const;
explicit operator bool() const;
void reset(T *ptr);
T &operator*() const;
T *operator->() const;
T& operator[](size_t i) const;
};
template <typename>
struct remove_reference;
template <typename _Tp>
struct remove_reference {
typedef _Tp type;
};
template <typename _Tp>
struct remove_reference<_Tp &> {
typedef _Tp type;
};
template <typename _Tp>
struct remove_reference<_Tp &&> {
typedef _Tp type;
};
template <typename _Tp>
constexpr typename std::remove_reference<_Tp>::type &&move(_Tp &&__t) noexcept {
return static_cast<typename remove_reference<_Tp>::type &&>(__t);
}
}
class A {
public:
A();
A(const A &);
A(A &&);
A &operator=(const A &);
A &operator=(A &&);
void foo() const;
int getInt() const;
operator bool() const;
int i;
};
void func() {
std::unique_ptr<A> ptr;
std::move(ptr);
ptr.get();
static_cast<bool>(ptr);
*ptr;
}