enum.c revision 64f7e258e9c43eefb7f82dfcd600abeed48dc395 
1// RUN: %clang_cc1 %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// expected-error{{tentative definition has type 'enum gccForwardEnumExtension' that is never completed}} \
26// expected-note{{forward declaration of 'enum gccForwardEnumExtension'}}
27
28int test2(int i)
29{
30  ve + i; // expected-error{{invalid operands to binary expression}}
31}
32
33// PR2020
34union u0;    // expected-note {{previous use is here}}
35enum u0 { U0A }; // expected-error {{use of 'u0' with tag type that does not match previous declaration}}
36
37
38// rdar://6095136
39extern enum some_undefined_enum ve2; // expected-warning {{ISO C forbids forward references to 'enum' types}}
40
41void test4() {
42  for (; ve2;) // expected-error {{statement requires expression of scalar type}}
43    ;
44  (_Bool)ve2;  // expected-error {{arithmetic or pointer type is required}}
45
46  for (; ;ve2) // expected-warning {{expression result unused}}
47    ;
48  (void)ve2;
49  ve2;         // expected-warning {{expression result unused}}
50}
51
52// PR2416
53enum someenum {};  // expected-warning {{use of empty enum extension}}
54
55// <rdar://problem/6093889>
56enum e0 { // expected-note {{previous definition is here}}
57  E0 = sizeof(enum e0 { E1 }), // expected-error {{nested redefinition}}
58};
59
60// PR3173
61enum { PR3173A, PR3173B = PR3173A+50 };
62
63// PR2753
64void foo() {
65  enum xpto; // expected-warning{{ISO C forbids forward references to 'enum' types}}
66  enum xpto; // expected-warning{{ISO C forbids forward references to 'enum' types}}
67}
68
69// <rdar://problem/6503878>
70typedef enum { X = 0 }; // expected-warning{{typedef requires a name}}
71
72
73enum NotYetComplete { // expected-note{{definition of 'enum NotYetComplete' is not complete until the closing '}'}}
74  NYC1 = sizeof(enum NotYetComplete) // expected-error{{invalid application of 'sizeof' to an incomplete type 'enum NotYetComplete'}}
75};
76
77/// PR3688
78struct s1 {
79  enum e1 (*bar)(void); // expected-warning{{ISO C forbids forward references to 'enum' types}}
80};
81
82enum e1 { YES, NO };
83
84static enum e1 badfunc(struct s1 *q) {
85  return q->bar();
86}
87
88
89// Make sure we don't a.k.a. anonymous enums.
90typedef enum {
91  an_enumerator = 20
92} an_enum;
93// FIXME: why is this only a warning?
94char * s = (an_enum) an_enumerator; // expected-warning {{incompatible integer to pointer conversion initializing 'an_enum', expected 'char *'}}
95