1 // RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -verify -std=c++11 -Wall %s
2 
3 struct Bitfield {
4   int n : 3 = 7; // expected-error {{bitfield member cannot have an in-class initializer}}
5 };
6 
7 int a;
8 class NoWarning {
9   int &n = a;
10 public:
GetN()11   int &GetN() { return n; }
12 };
13 
14 bool b();
15 int k;
16 struct Recurse {
17   int &n = // expected-error {{cannot use defaulted default constructor of 'Recurse' within the class outside of member functions because 'n' has an initializer}}
18       b() ?
19       Recurse().n : // expected-note {{implicit default constructor for 'Recurse' first required here}}
20       k;
21 };
22 
23 struct UnknownBound {
24   int as[] = { 1, 2, 3 }; // expected-error {{array bound cannot be deduced from an in-class initializer}}
25   int bs[4] = { 4, 5, 6, 7 };
26   int cs[] = { 8, 9, 10 }; // expected-error {{array bound cannot be deduced from an in-class initializer}}
27 };
28 
29 template<int n> struct T { static const int B; };
30 template<> struct T<2> { template<int C, int D> using B = int; };
31 const int C = 0, D = 0;
32 struct S {
33   int as[] = { decltype(x)::B<C, D>(0) }; // expected-error {{array bound cannot be deduced from an in-class initializer}}
34   T<sizeof(as) / sizeof(int)> x;
35   // test that we handle invalid array bound deductions without crashing when the declarator name is itself invalid
operator int[]S36   operator int[](){}; // expected-error {{'operator int' cannot be the name of a variable or data member}} \
37                       // expected-error {{array bound cannot be deduced from an in-class initializer}}
38 };
39 
40 struct ThrowCtor { ThrowCtor(int) noexcept(false); };
41 struct NoThrowCtor { NoThrowCtor(int) noexcept(true); };
42 
43 struct Throw { ThrowCtor tc = 42; };
44 struct NoThrow { NoThrowCtor tc = 42; };
45 
46 static_assert(!noexcept(Throw()), "incorrect exception specification");
47 static_assert(noexcept(NoThrow()), "incorrect exception specification");
48 
49 struct CheckExcSpec {
50   CheckExcSpec() noexcept(true) = default;
51   int n = 0;
52 };
53 struct CheckExcSpecFail {
54   CheckExcSpecFail() noexcept(true) = default; // expected-error {{exception specification of explicitly defaulted default constructor does not match the calculated one}}
55   ThrowCtor tc = 123;
56 };
57 
58 struct TypedefInit {
59   typedef int A = 0; // expected-error {{illegal initializer}}
60 };
61 
62 // PR10578 / <rdar://problem/9877267>
63 namespace PR10578 {
64   template<typename T>
65   struct X {
XPR10578::X66     X() {
67       T* x = 1; // expected-error{{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}}
68     }
69   };
70 
71   struct Y : X<int> {
72     Y();
73   };
74 
Y()75   Y::Y() try { // expected-note{{in instantiation of member function 'PR10578::X<int>::X' requested here}}
76   } catch(...) {
77   }
78 }
79 
80 namespace PR14838 {
~basePR14838::base81   struct base { ~base() {} };
82   class function : base {
~function()83     ~function() {} // expected-note {{implicitly declared private here}}
84   public:
function(...)85     function(...) {}
86   };
87   struct thing {};
88   struct another {
anotherPR14838::another89     another() : r(thing()) {}
90     // expected-error@-1 {{temporary of type 'const PR14838::function' has private destructor}}
91     // expected-warning@-2 {{binding reference member 'r' to a temporary value}}
92     const function &r; // expected-note {{reference member declared here}}
93   } af;
94 }
95 
96 namespace rdar14084171 {
97   struct Point { // expected-note 3 {{candidate constructor}}
98     double x;
99     double y;
100   };
101   struct Sprite {
102     Point location = Point(0,0); // expected-error {{no matching constructor for initialization of 'rdar14084171::Point'}}
103   };
f(Sprite & x)104   void f(Sprite& x) { x = x; }
105 }
106 
107 namespace PR18560 {
108   struct X { int m; };
109 
110   template<typename T = X,
111            typename U = decltype(T::m)>
112   int f();
113 
114   struct Y { int b = f(); };
115 }
116 
117 namespace template_valid {
118 // Valid, we shouldn't build a CXXDefaultInitExpr until A's ctor definition.
119 struct A {
120   A();
121   template <typename T>
122   struct B { int m1 = sizeof(A) + sizeof(T); };
123   B<int> m2;
124 };
A()125 A::A() {}
126 }
127 
128 namespace template_default_ctor {
129 struct A {
130   template <typename T>
131   struct B {
132     int m1 = 0; // expected-error {{cannot use defaulted default constructor of 'B' within 'A' outside of member functions because 'm1' has an initializer}}
133   };
134   // expected-note@+1 {{implicit default constructor for 'template_default_ctor::A::B<int>' first required here}}
135   enum { NOE = noexcept(B<int>()) };
136 };
137 }
138 
139 namespace default_ctor {
140 struct A {
141   struct B {
142     int m1 = 0; // expected-error {{cannot use defaulted default constructor of 'B' within 'A' outside of member functions because 'm1' has an initializer}}
143   };
144   // expected-note@+1 {{implicit default constructor for 'default_ctor::A::B' first required here}}
145   enum { NOE = noexcept(B()) };
146 };
147 }
148 
149 namespace member_template {
150 struct A {
151   template <typename T>
152   struct B {
153     struct C {
154       int m1 = 0; // expected-error {{cannot use defaulted default constructor of 'C' within 'A' outside of member functions because 'm1' has an initializer}}
155     };
156     template <typename U>
157     struct D {
158       int m1 = 0; // expected-error {{cannot use defaulted default constructor of 'D' within 'A' outside of member functions because 'm1' has an initializer}}
159     };
160   };
161   enum {
162     // expected-note@+1 {{implicit default constructor for 'member_template::A::B<int>::C' first required here}}
163     NOE1 = noexcept(B<int>::C()),
164     // expected-note@+1 {{implicit default constructor for 'member_template::A::B<int>::D<int>' first required here}}
165     NOE2 = noexcept(B<int>::D<int>())
166   };
167 };
168 }
169 
170 namespace explicit_instantiation {
171 template<typename T> struct X {
172   X(); // expected-note {{in instantiation of default member initializer 'explicit_instantiation::X<float>::n' requested here}}
173   int n = T::error; // expected-error {{type 'float' cannot be used prior to '::' because it has no members}}
174 };
175 template struct X<int>; // ok
X()176 template<typename T> X<T>::X() {}
177 template struct X<float>; // expected-note {{in instantiation of member function 'explicit_instantiation::X<float>::X' requested here}}
178 }
179 
180 namespace local_class {
f()181 template<typename T> void f() {
182   struct X { // expected-note {{in instantiation of default member initializer 'local_class::f()::X::n' requested here}}
183     int n = T::error; // expected-error {{type 'int' cannot be used prior to '::' because it has no members}}
184   };
185 }
g()186 void g() { f<int>(); } // expected-note {{in instantiation of function template specialization 'local_class::f<int>' requested here}}
187 }
188 
189 namespace PR22056 {
190 template <int N>
191 struct S {
192   int x[3] = {[N] = 3};
193 };
194 }
195