| // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
| |
| |
| // p3 |
| // A glvalue of type "cv1 T1" can be cast to type "rvalue reference to |
| // cv2 T2" if "cv2 T2" is reference-compatible with "cv1 T1" (8.5.3). |
| // p4 |
| // Otherwise, an expression e can be explicitly converted to a type T using a |
| // static_cast of the form static_cast<T>(e) if the declaration T t(e); is |
| // well-formed, for some invented temporary variable t (8.5). [...] |
| struct A { }; |
| struct B : A { }; |
| |
| struct C { explicit operator A&&(); }; |
| struct D { operator B(); }; |
| |
| template<typename T> T& lvalue(); |
| template<typename T> T&& xvalue(); |
| template <typename T> T prvalue(); |
| |
| void test(A &a, B &b) { |
| A &&ar0 = static_cast<A&&>(prvalue<A>()); |
| A &&ar1 = static_cast<A&&>(prvalue<B>()); |
| A &&ar2 = static_cast<A&&>(lvalue<C>()); |
| A &&ar3 = static_cast<A&&>(xvalue<C>()); |
| A &&ar4 = static_cast<A&&>(prvalue<C>()); |
| A &&ar5 = static_cast<A&&>(lvalue<D>()); |
| A &&ar6 = static_cast<A&&>(xvalue<D>()); |
| A &&ar7 = static_cast<A&&>(prvalue<D>()); |
| |
| A &&ar8 = static_cast<A&&>(prvalue<const A>()); // expected-error {{binding value of type 'const A' to reference to type 'A' drops 'const' qualifier}} |
| A &&ar9 = static_cast<A&&>(lvalue<const A>()); // expected-error {{cannot cast from lvalue of type 'const A'}} |
| A &&ar10 = static_cast<A&&>(xvalue<const A>()); // expected-error {{cannot cast from rvalue of type 'const A'}} |
| |
| const A &&ar11 = static_cast<const A&&>(prvalue<A>()); |
| const A &&ar12 = static_cast<const A&&>(prvalue<B>()); |
| const A &&ar13 = static_cast<const A&&>(lvalue<C>()); |
| const A &&ar14 = static_cast<const A&&>(xvalue<C>()); |
| const A &&ar15 = static_cast<const A&&>(prvalue<C>()); |
| const A &&ar16 = static_cast<const A&&>(lvalue<D>()); |
| |
| const A &&ar17 = static_cast<const A&&>(prvalue<A const volatile>()); // expected-error {{binding value of type 'const volatile A' to reference to type 'const A' drops 'volatile' qualifier}} |
| } |