1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2
3 struct A { };
A()4 A::A() { } // expected-error {{definition of implicitly declared default constructor}}
5
6 struct B { };
B(const B &)7 B::B(const B&) { } // expected-error {{definition of implicitly declared copy constructor}}
8
9 struct C { };
operator =(const C &)10 C& C::operator=(const C&) { return *this; } // expected-error {{definition of implicitly declared copy assignment operator}}
11
12 struct D { };
~D()13 D::~D() { } // expected-error {{definition of implicitly declared destructor}}
14
15 // Make sure that the special member functions are introduced for
16 // name-lookup purposes and overload with user-declared
17 // constructors and assignment operators.
18 namespace PR6570 {
19 class A { };
20
21 class B {
22 public:
B()23 B() {}
24
B(const A & a)25 B(const A& a) {
26 operator = (CONST);
27 operator = (a);
28 }
29
operator =(const A & a)30 B& operator = (const A& a) {
31 return *this;
32 }
33
f(const A & a)34 void f(const A &a) {
35 B b(a);
36 };
37
38 static const B CONST;
39 };
40
41 }
42
43 namespace PR7594 {
44 // If the lazy declaration of special member functions is triggered
45 // in an out-of-line initializer, make sure the functions aren't in
46 // the initializer scope. This used to crash Clang:
47 struct C {
48 C();
49 static C *c;
50 };
51 C *C::c = new C();
52 }
53
54 namespace Recursion {
55 template<typename T> struct InvokeCopyConstructor {
56 static const T &get();
57 typedef decltype(T(get())) type; // expected-error {{no matching conver}}
58 };
59 struct B;
60 struct A {
61 // expected-note@-1 {{while substituting deduced template arguments}}
62 typedef B type;
63 template<typename T,
64 typename = typename InvokeCopyConstructor<typename T::type>::type>
65 // expected-note@-1 {{in instantiation of template class}}
66 A(const T &);
67 // expected-note@-1 {{in instantiation of default argument}}
68 };
69 struct B { // expected-note {{candidate constructor (the implicit move }}
70 B(); // expected-note {{candidate constructor not viable}}
71 A a;
72 };
73 // Triggering the declaration of B's copy constructor causes overload
74 // resolution to occur for A's copying constructor, which instantiates
75 // InvokeCopyConstructor<B>, which triggers the declaration of B's copy
76 // constructor. Notionally, this happens when we get to the end of the
77 // definition of 'struct B', so there is no declared copy constructor yet.
78 //
79 // This behavior is g++-compatible, but isn't exactly right; the class is
80 // supposed to be incomplete when we implicitly declare its special members.
81 B b = B();
82
83
84 // Another case, which isn't ill-formed under our rules. This is inspired by
85 // a problem which occurs when combining CGAL with libstdc++-4.7.
86
87 template<typename T> T &&declval();
88 template<typename T, typename U> struct pair {
89 pair();
90 template<typename V, typename W,
91 typename = decltype(T(declval<const V&>())),
92 typename = decltype(U(declval<const W&>()))>
93 pair(const pair<V,W> &);
94 };
95
96 template<typename K> struct Line;
97
98 template<typename K> struct Vector {
99 Vector(const Line<K> &l);
100 };
101
102 template<typename K> struct Point {
103 Vector<K> v;
104 };
105
106 template<typename K> struct Line {
107 pair<Point<K>, Vector<K>> x;
108 };
109
110 // Trigger declaration of Line copy ctor, which causes substitution into
111 // pair's templated constructor, which triggers instantiation of the
112 // definition of Point's copy constructor, which performs overload resolution
113 // on Vector's constructors, which requires declaring all of Line's
114 // constructors. That should not find a copy constructor (because we've not
115 // declared it yet), but by the time we get all the way back here, we should
116 // find the copy constructor.
117 Line<void> L1;
118 Line<void> L2(L1);
119 }
120