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 *x0a; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
153 enum E2 *x0b; // OK
154 enum class E { a, b };
155 enum E x1 = E::a; // ok
156 enum class E x2 = E::a; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
157
158 enum F { a, b };
159 enum F y1 = a; // ok
160 enum class F y2 = a; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
161
162 struct S {
163 friend enum class E; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
164 friend enum class F; // expected-error {{reference to enumeration must use 'enum' not 'enum class'}}
165
166 friend enum G {}; // expected-error {{forward reference}} expected-error {{cannot define a type in a friend declaration}}
167 friend enum class H {}; // expected-error {{forward reference}} expected-error {{cannot define a type in a friend declaration}}
168 friend enum I : int {}; // expected-error {{forward reference}} expected-error {{cannot define a type in a friend declaration}}
169
170 enum A : int;
171 A a;
172 } s;
173
174 enum S::A : int {};
175
176 enum class B;
177 }
178
179 enum class N2764::B {};
180
181 namespace PR12106 {
182 template<typename E> struct Enum {
EnumPR12106::Enum183 Enum() : m_e(E::Last) {}
184 E m_e;
185 };
186
187 enum eCOLORS { Last };
188 Enum<eCOLORS> e;
189 }
190
191 namespace test7 {
192 enum class E { e = (struct S*)0 == (struct S*)0 };
193 S *p;
194 }
195
196 namespace test8 {
197 template<typename T> struct S {
198 enum A : int; // expected-note {{here}}
199 enum class B; // expected-note {{here}}
200 enum class C : int; // expected-note {{here}}
201 enum class D : int; // expected-note {{here}}
202 };
203 template<typename T> enum S<T>::A { a }; // expected-error {{previously declared with fixed underlying type}}
204 template<typename T> enum class S<T>::B : char { b }; // expected-error {{redeclared with different underlying}}
205 template<typename T> enum S<T>::C : int { c }; // expected-error {{previously declared as scoped}}
206 template<typename T> enum class S<T>::D : char { d }; // expected-error {{redeclared with different underlying}}
207 }
208
209 namespace test9 {
210 template<typename T> struct S {
211 enum class ET : T; // expected-note 2{{here}}
212 enum class Eint : int; // expected-note 2{{here}}
213 };
214 template<> enum class S<int>::ET : int {};
215 template<> enum class S<char>::ET : short {}; // expected-error {{different underlying type}}
216 template<> enum class S<int>::Eint : short {}; // expected-error {{different underlying type}}
217 template<> enum class S<char>::Eint : int {};
218
219 template<typename T> enum class S<T>::ET : int {}; // expected-error {{different underlying type 'int' (was 'short')}}
220 template<typename T> enum class S<T>::Eint : T {}; // expected-error {{different underlying type 'short' (was 'int')}}
221
222 // The implicit instantiation of S<short> causes the implicit instantiation of
223 // all declarations of member enumerations, so is ill-formed, even though we
224 // never instantiate the definitions of S<short>::ET nor S<short>::Eint.
225 S<short> s; // expected-note {{in instantiation of}}
226 }
227
228 namespace test10 {
f()229 template<typename T> int f() {
230 enum E : int;
231 enum E : T; // expected-note {{here}}
232 E x;
233 enum E : int { e }; // expected-error {{different underlying}}
234 x = e;
235 return x;
236 }
237 int k = f<int>();
238 int l = f<short>(); // expected-note {{here}}
239
g()240 template<typename T> int g() {
241 enum class E : int;
242 enum class E : T; // expected-note {{here}}
243 E x;
244 enum class E : int { e }; // expected-error {{different underlying}}
245 x = E::e;
246 return (int)x;
247 }
248 int m = g<int>();
249 int n = g<short>(); // expected-note {{here}}
250 }
251
252 namespace pr13128 {
253 // This should compile cleanly
254 class C {
255 enum class E { C };
256 };
257 }
258
259 namespace PR15633 {
260 template<typename T> struct A {
261 struct B {
262 enum class E : T;
263 enum class E2 : T;
264 };
265 };
266 template<typename T> enum class A<T>::B::E { e };
267 template class A<int>;
268
269 struct B { enum class E; };
270 template<typename T> enum class B::E { e }; // expected-error {{enumeration cannot be a template}}
271 }
272
273 namespace PR16900 {
274 enum class A;
f(A a)275 A f(A a) { return -a; } // expected-error {{invalid argument type 'PR16900::A' to unary expression}}
276 }
277
278 namespace PR18551 {
279 enum class A { A };
f()280 bool f() { return !A::A; } // expected-error {{invalid argument type 'PR18551::A' to unary expression}}
281 }
282
283 namespace rdar15124329 {
284 enum class B : bool { F, T };
285
286 const rdar15124329::B T1 = B::T;
287 typedef B C; const C T2 = B::T;
288
289 static_assert(T1 != B::F, "");
290 static_assert(T2 == B::T, "");
291 }
292
293 namespace PR18044 {
294 enum class E { a };
295
296 int E::e = 0; // expected-error {{does not refer into a class}}
f()297 void E::f() {} // expected-error {{does not refer into a class}}
298 struct E::S {}; // expected-error {{no struct named 'S'}}
299 struct T : E::S {}; // expected-error {{expected class name}}
300 enum E::E {}; // expected-error {{no enum named 'E'}}
301 int E::*p; // expected-error {{does not point into a class}}
302 using E::f; // expected-error {{no member named 'f'}}
303
304 using E::a; // expected-error {{using declaration cannot refer to a scoped enumerator}}
305 E b = a; // expected-error {{undeclared}}
306 }
307
308 namespace test11 {
309 enum class E { a };
310 typedef E E2;
f1()311 E2 f1() { return E::a; }
312
f()313 bool f() { return !f1(); } // expected-error {{invalid argument type 'test11::E2' (aka 'test11::E') to unary expression}}
314 }
315
316 namespace PR35586 {
317 enum C { R, G, B };
318 enum B { F = (enum C) -1, T}; // this should compile cleanly, it used to assert.
319 };
320