enum.c revision a03aca82de5259846d4ef38db11b8116398d2222 
1// RUN: clang %s -fsyntax-only -verify -pedantic
2enum e {A,
3        B = 42LL << 32,        // expected-warning {{ISO C restricts enumerator values to range of 'int'}}
4      C = -4, D = 12456 };
5
6enum f { a = -2147483648, b = 2147483647 }; // ok.
7
8enum g {  // too negative
9   c = -2147483649,         // expected-warning {{ISO C restricts enumerator values to range of 'int'}}
10   d = 2147483647 };
11enum h { e = -2147483648, // too pos
12   f = 2147483648           // expected-warning {{ISO C restricts enumerator values to range of 'int'}}
13};
14
15// minll maxull
16enum x                      // expected-warning {{enumeration values exceed range of largest integer}}
17{ y = -9223372036854775807LL-1,  // expected-warning {{ISO C restricts enumerator values to range of 'int'}}
18z = 9223372036854775808ULL };    // expected-warning {{ISO C restricts enumerator values to range of 'int'}}
19
20int test() {
21  return sizeof(enum e) ;
22}
23
24enum gccForwardEnumExtension ve; // expected-warning{{ISO C forbids forward references to 'enum' types}}
25
26int test2(int i)
27{
28  ve + i; // expected-error{{invalid operands to binary expression}}
29}
30
31// PR2020
32union u0;    // expected-note {{previous use is here}}
33enum u0 { U0A }; // expected-error {{use of 'u0' with tag type that does not match previous declaration}}
34
35
36// rdar://6095136
37extern enum some_undefined_enum ve2; // expected-warning {{ISO C forbids forward references to 'enum' types}}
38
39void test4() {
40  for (; ve2;) // expected-error {{statement requires expression of scalar type}}
41    ;
42  (_Bool)ve2;  // expected-error {{arithmetic or pointer type is required}}
43
44  for (; ;ve2)
45    ;
46  (void)ve2;
47  ve2;         // expected-warning {{expression result unused}}
48}
49
50// PR2416
51enum someenum {};  // expected-warning {{use of empty enum extension}}
52
53// <rdar://problem/6093889>
54enum e0 { // expected-note {{previous definition is here}}
55  E0 = sizeof(enum e0 { E1 }), // expected-error {{nested redefinition}}
56};
57
58// PR3173
59enum { PR3173A, PR3173B = PR3173A+50 };
60
61// PR2753
62void foo() {
63  enum xpto; // expected-warning{{ISO C forbids forward references to 'enum' types}}
64  enum xpto; // expected-warning{{ISO C forbids forward references to 'enum' types}}
65}
66
67// <rdar://problem/6503878>
68typedef enum { X = 0 }; // expected-warning{{typedef requires a name}}
69
70
71enum NotYetComplete { // expected-note{{definition of 'enum NotYetComplete' is not complete until the closing '}'}}
72  NYC1 = sizeof(enum NotYetComplete) // expected-error{{invalid application of 'sizeof' to an incomplete type 'enum NotYetComplete'}}
73};
74
75/// PR3688
76struct s1 {
77  enum e1 (*bar)(void); // expected-warning{{ISO C forbids forward references to 'enum' types}}
78};
79
80enum e1 { YES, NO };
81
82static enum e1 badfunc(struct s1 *q) {
83  return q->bar();
84}
85