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Richard Smith762bb9d2011-10-13 22:29:44 +00001// RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++11 -verify -triple x86_64-apple-darwin %s
Douglas Gregor1274ccd2010-10-08 23:50:27 +00002
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];
Richard Smithf39aec12012-02-04 07:07:42 +000037int* p2 = new int[E1::Val1]; // expected-error{{array size expression must have integral or unscoped enumeration type, not 'E1'}}
Douglas Gregor1274ccd2010-10-08 23:50:27 +000038
39enum class E4 {
40 e1 = -2147483648, // ok
41 e2 = 2147483647, // ok
Richard Smith8ef7b202012-01-18 23:55:52 +000042 e3 = 2147483648 // expected-error{{enumerator value evaluates to 2147483648, which cannot be narrowed to type 'int'}}
Douglas Gregor1274ccd2010-10-08 23:50:27 +000043};
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 use is here}} expected-note{{previous use 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 use is here}} expected-note{{previous use 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 use is here}} expected-note{{previous use 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 use is here}} expected-note{{previous use is here}}
97enum class Redeclare7 : short; // expected-error{{redeclared with different underlying type}}
98enum class Redeclare7 : short; // expected-error{{redeclared with different underlying type}}
Douglas Gregorb9075602011-02-22 02:55:24 +000099
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}}
Douglas Gregor90566c02011-03-01 17:16:20 +0000106
107void PR9333() {
108 enum class scoped_enum { yes, no, maybe };
109 scoped_enum e = scoped_enum::yes;
110 if (e == scoped_enum::no) { }
111}
Douglas Gregorb6adf2c2011-05-05 16:13:52 +0000112
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}
John McCall57c13002011-07-06 05:58:41 +0000122
John McCall9dc71d22011-07-06 06:57:57 +0000123// Part 1 of PR10264
John McCall57c13002011-07-06 05:58:41 +0000124namespace 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}
John McCall9dc71d22011-07-06 06:57:57 +0000133
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}
Eli Friedman19efa3e2011-12-06 00:10:34 +0000145
146namespace PR11484 {
147 const int val = 104;
148 enum class test1 { owner_dead = val, };
149}
Richard Smithbdad7a22012-01-10 01:33:14 +0000150
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 {};
Douglas Gregor5bc37f62012-03-08 02:08:05 +0000177
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}
Nick Lewycky1659c372012-03-10 07:47:07 +0000187
188namespace test7 {
189 enum class E { e = (struct S*)0 == (struct S*)0 };
190 S *p;
191}
Richard Smith3343fad2012-03-23 23:09:08 +0000192
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}}
Richard Smith4ca93d92012-03-26 04:08:46 +0000198 enum class D : int; // expected-note {{here}}
Richard Smith3343fad2012-03-23 23:09:08 +0000199 };
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}}
Richard Smith4ca93d92012-03-26 04:08:46 +0000203 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}}
Richard Smith3343fad2012-03-23 23:09:08 +0000223}
Richard Smith38f0df32012-03-26 04:58:10 +0000224
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}