1 // RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++98 -verify -triple x86_64-apple-darwin %s
2 // RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++11 -verify -triple x86_64-apple-darwin %s
3 enum E { // expected-note{{previous definition is here}}
4 Val1,
5 Val2
6 };
7
8 enum E; // expected-warning{{redeclaration of already-defined enum 'E' is a GNU extension}}
9
10 int& enumerator_type(int);
11 float& enumerator_type(E);
12
f()13 void f() {
14 E e = Val1;
15 float& fr = enumerator_type(Val2);
16 }
17
18 // <rdar://problem/6502934>
19 typedef enum Foo {
20 A = 0,
21 B = 1
22 } Foo;
23
bar()24 void bar() {
25 Foo myvar = A;
26 myvar = B;
27 }
28
29 /// PR3688
30 struct s1 {
31 enum e1 (*bar)(void); // expected-error{{ISO C++ forbids forward references to 'enum' types}}
32 };
33
34 enum e1 { YES, NO };
35
badfunc(struct s1 * q)36 static enum e1 badfunc(struct s1 *q) {
37 return q->bar();
38 }
39
40 enum e2; // expected-error{{ISO C++ forbids forward references to 'enum' types}}
41
42 namespace test1 {
43 template <class A, class B> struct is_same { static const int value = -1; };
44 template <class A> struct is_same<A,A> { static const int value = 1; };
45
46 enum enum0 { v0 };
47 int test0[is_same<__typeof(+v0), int>::value];
48
49 enum enum1 { v1 = __INT_MAX__ };
50 int test1[is_same<__typeof(+v1), int>::value];
51
52 enum enum2 { v2 = __INT_MAX__ * 2U };
53 int test2[is_same<__typeof(+v2), unsigned int>::value];
54
55 enum enum3 { v3 = __LONG_MAX__ };
56 int test3[is_same<__typeof(+v3), long>::value];
57
58 enum enum4 { v4 = __LONG_MAX__ * 2UL };
59 int test4[is_same<__typeof(+v4), unsigned long>::value];
60 }
61
62 // PR6061
63 namespace PR6061 {
64 struct A { enum { id }; };
65 struct B { enum { id }; };
66
67 struct C : public A, public B
68 {
69 enum { id };
70 };
71 }
72
73 namespace Conditional {
x(const enum a x)74 enum a { A }; a x(const enum a x) { return 1?x:A; }
75 }
76
77 namespace PR7051 {
78 enum E { e0 };
f()79 void f() {
80 E e;
81 e = 1; // expected-error{{assigning to 'PR7051::E' from incompatible type 'int'}}
82 e |= 1; // expected-error{{assigning to 'PR7051::E' from incompatible type 'int'}}
83 }
84 }
85
86 // PR7466
87 enum { }; // expected-warning{{declaration does not declare anything}}
88 typedef enum { }; // expected-warning{{typedef requires a name}}
89
90 // PR7921
91 enum PR7921E { // expected-note {{not complete until the closing '}'}}
92 PR7921V = (PR7921E)(123) // expected-error {{'PR7921E' is an incomplete type}}
93 };
94
PR8089()95 void PR8089() {
96 enum E; // expected-error{{ISO C++ forbids forward references to 'enum' types}} expected-note {{forward declaration}}
97 int a = (E)3; // expected-error {{'E' is an incomplete type}}
98 }
99
100 // This is accepted as a GNU extension. In C++98, there was no provision for
101 // expressions with UB to be non-constant.
102 enum { overflow = 123456 * 234567 };
103 #if __cplusplus >= 201103L
104 // expected-warning@-2 {{not an integral constant expression}}
105 // expected-note@-3 {{value 28958703552 is outside the range of representable values}}
106 #else
107 // expected-warning@-5 {{overflow in expression; result is -1106067520 with type 'int'}}
108 #endif
109
110 // FIXME: This is not consistent with the above case.
111 enum NoFold : int { overflow2 = 123456 * 234567 };
112 #if __cplusplus >= 201103L
113 // expected-error@-2 {{enumerator value is not a constant expression}}
114 // expected-note@-3 {{value 28958703552 is outside the range of representable values}}
115 #else
116 // expected-warning@-5 {{overflow in expression; result is -1106067520 with type 'int'}}
117 // expected-warning@-6 {{extension}}
118 #endif
119
120 // PR28903
121 struct PR28903 {
122 enum {
123 PR28903_A = (enum { // expected-error-re {{'PR28903::(unnamed enum at {{.*}})' cannot be defined in an enumeration}}
124 PR28903_B,
125 PR28903_C = PR28903_B
126 })
127 };
128 };
129