1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // test forward
11
12 #include <utility>
13 #include <cassert>
14
15 struct A
16 {
17 };
18
source()19 A source() {return A();}
csource()20 const A csource() {return A();}
21
22 typedef char one;
23 struct two {one _[2];};
24 struct four {one _[4];};
25 struct eight {one _[8];};
26
27 one test(A&);
28 two test(const A&);
29
30 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
31
32 four test(A&&);
33 eight test(const A&&);
34
35 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
36
main()37 int main()
38 {
39 A a;
40 const A ca = A();
41
42 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
43 static_assert(sizeof(test(std::forward<A&>(a))) == 1, "");
44 static_assert(sizeof(test(std::forward<A>(a))) == 4, "");
45 static_assert(sizeof(test(std::forward<A>(source()))) == 4, "");
46
47 static_assert(sizeof(test(std::forward<const A&>(a))) == 2, "");
48 // static_assert(sizeof(test(std::forward<const A&>(source()))) == 2, "");
49 static_assert(sizeof(test(std::forward<const A>(a))) == 8, "");
50 static_assert(sizeof(test(std::forward<const A>(source()))) == 8, "");
51
52 static_assert(sizeof(test(std::forward<const A&>(ca))) == 2, "");
53 // static_assert(sizeof(test(std::forward<const A&>(csource()))) == 2, "");
54 static_assert(sizeof(test(std::forward<const A>(ca))) == 8, "");
55 static_assert(sizeof(test(std::forward<const A>(csource()))) == 8, "");
56
57 #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
58
59 static_assert(sizeof(test(std::forward<A&>(a))) == 1, "");
60 static_assert(sizeof(test(std::forward<A>(a))) == 1, "");
61 // static_assert(sizeof(test(std::forward<A>(source()))) == 2, "");
62
63 static_assert(sizeof(test(std::forward<const A&>(a))) == 2, "");
64 static_assert(sizeof(test(std::forward<const A&>(source()))) == 2, "");
65 static_assert(sizeof(test(std::forward<const A>(a))) == 2, "");
66 static_assert(sizeof(test(std::forward<const A>(source()))) == 2, "");
67
68 static_assert(sizeof(test(std::forward<const A&>(ca))) == 2, "");
69 static_assert(sizeof(test(std::forward<const A&>(csource()))) == 2, "");
70 static_assert(sizeof(test(std::forward<const A>(ca))) == 2, "");
71 static_assert(sizeof(test(std::forward<const A>(csource()))) == 2, "");
72 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
73 }
74