1 // RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++11 -verify -triple x86_64-apple-darwin %s
2
3 enum class E1 {
4 Val1 = 1L
5 };
6
7 enum struct E2 {
8 Val1 = '\0'
9 };
10
11 E1 v1 = Val1; // expected-error{{undeclared identifier}}
12 E1 v2 = E1::Val1;
13
14 static_assert(sizeof(E1) == sizeof(int), "bad size");
15 static_assert(sizeof(E1::Val1) == sizeof(int), "bad size");
16 static_assert(sizeof(E2) == sizeof(int), "bad size");
17 static_assert(sizeof(E2::Val1) == sizeof(int), "bad size");
18
19 E1 v3 = E2::Val1; // expected-error{{cannot initialize a variable}}
20 int x1 = E1::Val1; // expected-error{{cannot initialize a variable}}
21
22 enum E3 : char {
23 Val2 = 1
24 };
25
26 E3 v4 = Val2;
27 E1 v5 = Val2; // expected-error{{cannot initialize a variable}}
28
29 static_assert(sizeof(E3) == 1, "bad size");
30
31 int x2 = Val2;
32
33 int a1[Val2];
34 int a2[E1::Val1]; // expected-error{{size of array has non-integer type}}
35
36 int* p1 = new int[Val2];
37 int* p2 = new int[E1::Val1]; // expected-error{{array size expression must have integral or unscoped enumeration type, not 'E1'}}
38
39 enum 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
45 enum class E5 {
46 e1 = 2147483647, // ok
47 e2 // expected-error{{2147483648 is not representable in the underlying}}
48 };
49
50 enum class E6 : bool {
51 e1 = false, e2 = true,
52 e3 // expected-error{{2 is not representable in the underlying}}
53 };
54
55 enum E7 : bool {
56 e1 = false, e2 = true,
57 e3 // expected-error{{2 is not representable in the underlying}}
58 };
59
60 template <class T>
61 struct X {
62 enum E : T {
63 e1, e2,
64 e3 // expected-error{{2 is not representable in the underlying}}
65 };
66 };
67
68 X<bool> X2; // expected-note{{in instantiation of template}}
69
70 enum Incomplete1; // expected-error{{C++ forbids forward references}}
71
72 enum Complete1 : int;
73 Complete1 complete1;
74
75 enum class Complete2;
76 Complete2 complete2;
77
78 // All the redeclarations below are done twice on purpose. Tests that the type
79 // of the declaration isn't changed.
80
81 enum class Redeclare2; // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
82 enum Redeclare2; // expected-error{{previously declared as scoped}}
83 enum Redeclare2; // expected-error{{previously declared as scoped}}
84
85 enum Redeclare3 : int; // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
86 enum Redeclare3; // expected-error{{previously declared with fixed underlying type}}
87 enum Redeclare3; // expected-error{{previously declared with fixed underlying type}}
88
89 enum class Redeclare5;
90 enum class Redeclare5 : int; // ok
91
92 enum Redeclare6 : int; // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
93 enum Redeclare6 : short; // expected-error{{redeclared with different underlying type}}
94 enum Redeclare6 : short; // expected-error{{redeclared with different underlying type}}
95
96 enum class Redeclare7; // expected-note{{previous declaration is here}} expected-note{{previous declaration is here}}
97 enum class Redeclare7 : short; // expected-error{{redeclared with different underlying type}}
98 enum class Redeclare7 : short; // expected-error{{redeclared with different underlying type}}
99
100 enum : long {
101 long_enum_val = 10000
102 };
103
104 enum : long x; // expected-error{{unnamed enumeration must be a definition}} \
105 // expected-warning{{declaration does not declare anything}}
106
PR9333()107 void 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>
114 namespace rdar9366066 {
115 enum class X : unsigned { value };
116
f(X x)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
124 namespace 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
135 namespace 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}}
test()141 void test() {
142 (void) A::e; // expected-error {{incomplete type 'test6::A' named in nested name specifier}}
143 }
144 }
145
146 namespace PR11484 {
147 const int val = 104;
148 enum class test1 { owner_dead = val, };
149 }
150
151 namespace 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
176 enum class N2764::B {};
177
178 namespace PR12106 {
179 template<typename E> struct Enum {
EnumPR12106::Enum180 Enum() : m_e(E::Last) {}
181 E m_e;
182 };
183
184 enum eCOLORS { Last };
185 Enum<eCOLORS> e;
186 }
187
188 namespace test7 {
189 enum class E { e = (struct S*)0 == (struct S*)0 };
190 S *p;
191 }
192
193 namespace 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
206 namespace 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
225 namespace test10 {
f()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
g()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
249 namespace pr13128 {
250 // This should compile cleanly
251 class C {
252 enum class E { C };
253 };
254 }
255
256 namespace 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
270 namespace PR16900 {
271 enum class A;
f(A a)272 A f(A a) { return -a; } // expected-error {{invalid argument type 'PR16900::A' to unary expression}}
273 }
274
275 namespace PR18551 {
276 enum class A { A };
f()277 bool f() { return !A::A; } // expected-error {{invalid argument type 'PR18551::A' to unary expression}}
278 }
279
280 namespace 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
290 namespace PR18044 {
291 enum class E { a };
292
293 int E::e = 0; // expected-error {{does not refer into a class}}
f()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
305 namespace test11 {
306 enum class E { a };
307 typedef E E2;
f1()308 E2 f1() { return E::a; }
309
f()310 bool f() { return !f1(); } // expected-error {{invalid argument type 'E2' (aka 'test11::E') to unary expression}}
311 }
312