1// RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++11 -verify -triple x86_64-apple-darwin %s
2
3enum class E1 {
4  Val1 = 1L
5};
6
7enum struct E2 {
8  Val1 = '\0'
9};
10
11E1 v1 = Val1; // expected-error{{undeclared identifier}}
12E1 v2 = E1::Val1;
13
14static_assert(sizeof(E1) == sizeof(int), "bad size");
15static_assert(sizeof(E1::Val1) == sizeof(int), "bad size");
16static_assert(sizeof(E2) == sizeof(int), "bad size");
17static_assert(sizeof(E2::Val1) == sizeof(int), "bad size");
18
19E1 v3 = E2::Val1; // expected-error{{cannot initialize a variable}}
20int x1 = E1::Val1; // expected-error{{cannot initialize a variable}}
21
22enum E3 : char {
23  Val2 = 1
24};
25
26E3 v4 = Val2;
27E1 v5 = Val2; // expected-error{{cannot initialize a variable}}
28
29static_assert(sizeof(E3) == 1, "bad size");
30
31int x2 = Val2;
32
33int a1[Val2];
34int a2[E1::Val1]; // expected-error{{size of array has non-integer type}}
35
36int* p1 = new int[Val2];
37int* p2 = new int[E1::Val1]; // expected-error{{array size expression must have integral or unscoped enumeration type, not 'E1'}}
38
39enum class E4 {
40  e1 = -2147483648, // ok
41  e2 = 2147483647, // ok
42  e3 = 2147483648 // expected-error{{enumerator value evaluates to 2147483648, which cannot be narrowed to type 'int'}}
43};
44
45enum class E5 {
46  e1 = 2147483647, // ok
47  e2 // expected-error{{2147483648 is not representable in the underlying}}
48};
49
50enum class E6 : bool {
51    e1 = false, e2 = true,
52    e3 // expected-error{{2 is not representable in the underlying}}
53};
54
55enum E7 : bool {
56    e1 = false, e2 = true,
57    e3 // expected-error{{2 is not representable in the underlying}}
58};
59
60template <class T>
61struct X {
62  enum E : T {
63    e1, e2,
64    e3 // expected-error{{2 is not representable in the underlying}}
65  };
66};
67
68X<bool> X2; // expected-note{{in instantiation of template}}
69
70enum Incomplete1; // expected-error{{C++ forbids forward references}}
71
72enum Complete1 : int;
73Complete1 complete1;
74
75enum class Complete2;
76Complete2 complete2;
77
78// All the redeclarations below are done twice on purpose. Tests that the type
79// of the declaration isn't changed.
80
81enum class Redeclare2; // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
82enum Redeclare2; // expected-error{{previously declared as scoped}}
83enum Redeclare2; // expected-error{{previously declared as scoped}}
84
85enum Redeclare3 : int; // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
86enum Redeclare3; // expected-error{{previously declared with fixed underlying type}}
87enum Redeclare3; // expected-error{{previously declared with fixed underlying type}}
88
89enum class Redeclare5;
90enum class Redeclare5 : int; // ok
91
92enum Redeclare6 : int;   // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
93enum Redeclare6 : short; // expected-error{{redeclared with different underlying type}}
94enum Redeclare6 : short; // expected-error{{redeclared with different underlying type}}
95
96enum class Redeclare7;         // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
97enum class Redeclare7 : short; // expected-error{{redeclared with different underlying type}}
98enum class Redeclare7 : short; // expected-error{{redeclared with different underlying type}}
99
100enum : long {
101  long_enum_val = 10000
102};
103
104enum : long x; // expected-error{{unnamed enumeration must be a definition}} \
105// expected-warning{{declaration does not declare anything}}
106
107void PR9333() {
108  enum class scoped_enum { yes, no, maybe };
109  scoped_enum e = scoped_enum::yes;
110  if (e == scoped_enum::no) { }
111}
112
113// <rdar://problem/9366066>
114namespace rdar9366066 {
115  enum class X : unsigned { value };
116
117  void f(X x) {
118    x % X::value; // expected-error{{invalid operands to binary expression ('rdar9366066::X' and 'rdar9366066::X')}}
119    x % 8; // expected-error{{invalid operands to binary expression ('rdar9366066::X' and 'int')}}
120  }
121}
122
123// Part 1 of PR10264
124namespace test5 {
125  namespace ns {
126    typedef unsigned Atype;
127    enum A : Atype;
128  }
129  enum ns::A : ns::Atype {
130    x, y, z
131  };
132}
133
134// Part 2 of PR10264
135namespace test6 {
136  enum A : unsigned;
137  struct A::a; // expected-error {{incomplete type 'test6::A' named in nested name specifier}}
138  enum A::b; // expected-error {{incomplete type 'test6::A' named in nested name specifier}}
139  int A::c; // expected-error {{incomplete type 'test6::A' named in nested name specifier}}
140  void A::d(); // expected-error {{incomplete type 'test6::A' named in nested name specifier}}
141  void test() {
142    (void) A::e; // expected-error {{incomplete type 'test6::A' named in nested name specifier}}
143  }
144}
145
146namespace PR11484 {
147  const int val = 104;
148  enum class test1 { owner_dead = val, };
149}
150
151namespace N2764 {
152  enum class E { a, b };
153  enum E x1 = E::a; // ok
154  enum class E x2 = E::a; // expected-error {{reference to scoped enumeration must use 'enum' not 'enum class'}}
155
156  enum F { a, b };
157  enum F y1 = a; // ok
158  enum class F y2 = a; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
159
160  struct S {
161    friend enum class E; // expected-error {{reference to scoped enumeration must use 'enum' not 'enum class'}}
162    friend enum class F; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
163
164    friend enum G {}; // expected-error {{forward reference}} expected-error {{cannot define a type in a friend declaration}}
165    friend enum class H {}; // expected-error {{cannot define a type in a friend declaration}}
166
167    enum A : int;
168    A a;
169  } s;
170
171  enum S::A : int {};
172
173  enum class B;
174}
175
176enum class N2764::B {};
177
178namespace PR12106 {
179  template<typename E> struct Enum {
180    Enum() : m_e(E::Last) {}
181    E m_e;
182  };
183
184  enum eCOLORS { Last };
185  Enum<eCOLORS> e;
186}
187
188namespace test7 {
189  enum class E { e = (struct S*)0 == (struct S*)0 };
190  S *p;
191}
192
193namespace test8 {
194  template<typename T> struct S {
195    enum A : int; // expected-note {{here}}
196    enum class B; // expected-note {{here}}
197    enum class C : int; // expected-note {{here}}
198    enum class D : int; // expected-note {{here}}
199  };
200  template<typename T> enum S<T>::A { a }; // expected-error {{previously declared with fixed underlying type}}
201  template<typename T> enum class S<T>::B : char { b }; // expected-error {{redeclared with different underlying}}
202  template<typename T> enum S<T>::C : int { c }; // expected-error {{previously declared as scoped}}
203  template<typename T> enum class S<T>::D : char { d }; // expected-error {{redeclared with different underlying}}
204}
205
206namespace test9 {
207  template<typename T> struct S {
208    enum class ET : T; // expected-note 2{{here}}
209    enum class Eint : int; // expected-note 2{{here}}
210  };
211  template<> enum class S<int>::ET : int {};
212  template<> enum class S<char>::ET : short {}; // expected-error {{different underlying type}}
213  template<> enum class S<int>::Eint : short {}; // expected-error {{different underlying type}}
214  template<> enum class S<char>::Eint : int {};
215
216  template<typename T> enum class S<T>::ET : int {}; // expected-error {{different underlying type 'int' (was 'short')}}
217  template<typename T> enum class S<T>::Eint : T {}; // expected-error {{different underlying type 'short' (was 'int')}}
218
219  // The implicit instantiation of S<short> causes the implicit instantiation of
220  // all declarations of member enumerations, so is ill-formed, even though we
221  // never instantiate the definitions of S<short>::ET nor S<short>::Eint.
222  S<short> s; // expected-note {{in instantiation of}}
223}
224
225namespace test10 {
226  template<typename T> int f() {
227    enum E : int;
228    enum E : T; // expected-note {{here}}
229    E x;
230    enum E : int { e }; // expected-error {{different underlying}}
231    x = e;
232    return x;
233  }
234  int k = f<int>();
235  int l = f<short>(); // expected-note {{here}}
236
237  template<typename T> int g() {
238    enum class E : int;
239    enum class E : T; // expected-note {{here}}
240    E x;
241    enum class E : int { e }; // expected-error {{different underlying}}
242    x = E::e;
243    return (int)x;
244  }
245  int m = g<int>();
246  int n = g<short>(); // expected-note {{here}}
247}
248
249namespace pr13128 {
250  // This should compile cleanly
251  class C {
252    enum class E { C };
253  };
254}
255
256namespace PR15633 {
257  template<typename T> struct A {
258    struct B {
259      enum class E : T;
260      enum class E2 : T;
261    };
262  };
263  template<typename T> enum class A<T>::B::E { e };
264  template class A<int>;
265
266  struct B { enum class E; };
267  template<typename T> enum class B::E { e }; // expected-error {{enumeration cannot be a template}}
268}
269
270namespace PR16900 {
271  enum class A;
272  A f(A a) { return -a; } // expected-error {{invalid argument type 'PR16900::A' to unary expression}}
273}
274
275namespace PR18551 {
276  enum class A { A };
277  bool f() { return !A::A; } // expected-error {{invalid argument type 'PR18551::A' to unary expression}}
278}
279
280namespace rdar15124329 {
281  enum class B : bool { F, T };
282
283  const rdar15124329::B T1 = B::T;
284  typedef B C;  const C T2 = B::T;
285
286  static_assert(T1 != B::F, "");
287  static_assert(T2 == B::T, "");
288}
289
290namespace PR18044 {
291  enum class E { a };
292
293  int E::e = 0; // expected-error {{does not refer into a class}}
294  void E::f() {} // expected-error {{does not refer into a class}}
295  struct E::S {}; // expected-error {{no struct named 'S'}}
296  struct T : E::S {}; // expected-error {{expected class name}}
297  enum E::E {}; // expected-error {{no enum named 'E'}}
298  int E::*p; // expected-error {{does not point into a class}}
299  using E::f; // expected-error {{no member named 'f'}}
300
301  using E::a; // expected-error {{using declaration cannot refer to a scoped enumerator}}
302  E b = a; // expected-error {{undeclared}}
303}
304
305namespace test11 {
306  enum class E { a };
307  typedef E E2;
308  E2 f1() { return E::a; }
309
310  bool f() { return !f1(); } // expected-error {{invalid argument type 'E2' (aka 'test11::E') to unary expression}}
311}
312