зеркало из https://github.com/microsoft/clang-1.git
113 строки
3.5 KiB
C++
113 строки
3.5 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
|
|
|
|
template<typename T>
|
|
class unique_ptr {
|
|
T *ptr;
|
|
|
|
unique_ptr(const unique_ptr&) = delete; // expected-note 3{{function has been explicitly marked deleted here}}
|
|
unique_ptr &operator=(const unique_ptr&) = delete; // expected-note{{candidate function has been explicitly deleted}}
|
|
public:
|
|
unique_ptr() : ptr(0) { }
|
|
unique_ptr(unique_ptr &&other) : ptr(other.ptr) { other.ptr = 0; }
|
|
explicit unique_ptr(T *ptr) : ptr(ptr) { }
|
|
|
|
~unique_ptr() { delete ptr; }
|
|
|
|
unique_ptr &operator=(unique_ptr &&other) { // expected-note{{candidate function not viable: no known conversion from 'unique_ptr<int>' to 'unique_ptr<int> &&' for 1st argument}}
|
|
if (this == &other)
|
|
return *this;
|
|
|
|
delete ptr;
|
|
ptr = other.ptr;
|
|
other.ptr = 0;
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
template<typename T>
|
|
struct remove_reference {
|
|
typedef T type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct remove_reference<T&> {
|
|
typedef T type;
|
|
};
|
|
|
|
template<typename T>
|
|
struct remove_reference<T&&> {
|
|
typedef T type;
|
|
};
|
|
|
|
|
|
template <class T> typename remove_reference<T>::type&& move(T&& t) {
|
|
return static_cast<typename remove_reference<T>::type&&>(t);
|
|
}
|
|
|
|
template <class T> T&& forward(typename remove_reference<T>::type& t) {
|
|
return static_cast<T&&>(t);
|
|
}
|
|
|
|
template <class T> T&& forward(typename remove_reference<T>::type&& t) {
|
|
return static_cast<T&&>(t);
|
|
}
|
|
|
|
template<typename T, typename ...Args>
|
|
unique_ptr<T> make_unique_ptr(Args &&...args) {
|
|
return unique_ptr<T>(new T(forward<Args>(args)...));
|
|
}
|
|
|
|
template<typename T> void accept_unique_ptr(unique_ptr<T>); // expected-note{{passing argument to parameter here}}
|
|
|
|
unique_ptr<int> test_unique_ptr() {
|
|
// Simple construction
|
|
unique_ptr<int> p;
|
|
unique_ptr<int> p1(new int);
|
|
|
|
// Move construction
|
|
unique_ptr<int> p2(make_unique_ptr<int>(17));
|
|
unique_ptr<int> p3 = make_unique_ptr<int>(17);
|
|
|
|
// Copy construction (failures)
|
|
unique_ptr<int> p4(p); // expected-error{{call to deleted constructor of 'unique_ptr<int>'}}
|
|
unique_ptr<int> p5 = p; // expected-error{{call to deleted constructor of 'unique_ptr<int>'}}
|
|
|
|
// Move assignment
|
|
p2 = move(p);
|
|
p2 = make_unique_ptr<int>(0);
|
|
|
|
// Copy assignment (failures);
|
|
p2 = p3; // expected-error{{overload resolution selected deleted operator '='}}
|
|
|
|
// Implicit copies
|
|
accept_unique_ptr(make_unique_ptr<double>(0.0));
|
|
accept_unique_ptr(move(p2));
|
|
|
|
// Implicit copies (failures);
|
|
accept_unique_ptr(p); // expected-error{{call to deleted constructor of 'unique_ptr<int>'}}
|
|
|
|
return p;
|
|
}
|
|
|
|
namespace perfect_forwarding {
|
|
struct A { };
|
|
|
|
struct F0 {
|
|
void operator()(A&, const A&, A&&, const A&&, A&&, const A&&); // expected-note{{candidate function not viable: 5th argument ('const perfect_forwarding::A') would lose const qualifier}}
|
|
};
|
|
|
|
template<typename F, typename ...Args>
|
|
void forward(F f, Args &&...args) {
|
|
f(static_cast<Args&&>(args)...); // expected-error{{no matching function for call to object of type 'perfect_forwarding::F0'}}
|
|
}
|
|
|
|
template<typename T> T get();
|
|
|
|
void test_forward() {
|
|
forward(F0(), get<A&>(), get<A const&>(), get<A>(), get<const A>(),
|
|
get<A&&>(), get<const A&&>());
|
|
forward(F0(), get<A&>(), get<A const&>(), get<A>(), get<const A>(), // expected-note{{in instantiation of function template specialization 'perfect_forwarding::forward<perfect_forwarding::F0, perfect_forwarding::A &, const perfect_forwarding::A &, perfect_forwarding::A, const perfect_forwarding::A, const perfect_forwarding::A, const perfect_forwarding::A>' requested here}}
|
|
get<const A&&>(), get<const A&&>());
|
|
}
|
|
};
|