1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -verify %s
2 template<typename T> int force_same(T, T);
3 
4 // C++ [dcl.enum]p5:
5 //   [...] If the underlying type is not fixed, the type of each enumerator is
6 //   the type of its initializing value:
7 //     - If an initializer is specified for an enumerator, the initializing
8 //       value has the same type as the expression.
9 enum Bullet1 {
10   Bullet1Val1 = 'a',
11   Bullet1Val2 = 10u,
12   Bullet1Val1IsChar = sizeof(force_same(Bullet1Val1, char(0))),
13   Bullet1Val2IsUnsigned = sizeof(force_same(Bullet1Val2, unsigned(0)))
14 };
15 
16 //    - If no initializer is specified for the first enumerator, the
17 //      initializing value has an unspecified integral type.
18 enum Bullet2 {
19   Bullet2Val,
20   Bullet2ValIsInt = sizeof(force_same(Bullet2Val, int(0)))
21 };
22 
23 //    - Otherwise the type of the initializing value is the same as the type
24 //      of the initializing value of the preceding enumerator unless the
25 //      incremented value is not representable in that type, in which case the
26 //      type is an unspecified integral type sufficient to contain the
27 //      incremented value. If no such type exists, the program is ill-formed.
28 enum Bullet3a {
29   Bullet3aVal1 = 17,
30   Bullet3aVal2,
31   Bullet3aVal2IsInt = sizeof(force_same(Bullet3aVal2, int(0))),
32   Bullet3aVal3 = 2147483647,
33   Bullet3aVal3IsInt = sizeof(force_same(Bullet3aVal3, int(0))),
34   Bullet3aVal4,
35   Bullet3aVal4IsUnsigned = sizeof(force_same(Bullet3aVal4, 0ul))
36 };
37 
38 enum Bullet3b {
39   Bullet3bVal1 = 17u,
40   Bullet3bVal2,
41   Bullet3bVal2IsInt = sizeof(force_same(Bullet3bVal2, 0u)),
42   Bullet3bVal3 = 2147483647u,
43   Bullet3bVal3IsInt = sizeof(force_same(Bullet3bVal3, 0u)),
44   Bullet3bVal4,
45   Bullet3bVal4IsUnsigned = sizeof(force_same(Bullet3bVal4, 0ul))
46 };
47 
48 enum Bullet3c {
49   Bullet3cVal1 = 0xFFFFFFFFFFFFFFFEull,
50   Bullet3cVal2,
51   Bullet3cVal3 // expected-warning{{not representable}}
52 };
53 
54 //   Following the closing brace of an enum-specifier, each enumerator has the
55 //   type of its enumeration.
56 int array0[sizeof(force_same(Bullet3bVal3, Bullet3b(0)))? 1 : -1];
57