1 // RUN: %clang_cc1 %s -fsyntax-only -verify -std=c11 -Wno-unused-value
3 enum e0; // expected-note{{forward declaration of 'enum e0'}}
6 int a : -1; // expected-error{{bit-field 'a' has negative width}}
9 int b : 33; // expected-error{{width of bit-field 'b' (33 bits) exceeds width of its type (32 bits)}}
11 int c : (1 + 0.25); // expected-error{{expression is not an integer constant expression}}
12 int d : (int)(1 + 0.25);
15 int e : 0; // expected-error {{bit-field 'e' has zero width}}
17 float xx : 4; // expected-error {{bit-field 'xx' has non-integral type}}
20 enum e0 f : 1; // expected-error {{field has incomplete type 'enum e0'}}
25 char : 10; // expected-error {{width of anonymous bit-field (10 bits) exceeds width of its type (8 bits)}}
26 unsigned : -2; // expected-error {{anonymous bit-field has negative width (-2)}}
27 float : 12; // expected-error {{anonymous bit-field has non-integral type 'float'}}
29 _Bool : 2; // expected-error {{width of anonymous bit-field (2 bits) exceeds width of its type (1 bit)}}
30 _Bool h : 5; // expected-error {{width of bit-field 'h' (5 bits) exceeds width of its type (1 bit)}}
33 struct b {unsigned x : 2;} x;
37 struct {unsigned x : 2;} x2;
38 __typeof__((x.x+=1)+1) y;
39 __typeof__((0,x.x)+1) y;
44 double : 2; // expected-error{{anonymous bit-field has non-integral type 'double'}}
52 void test4(struct Test4 *t) {
53 (void) sizeof(t->bitX); // expected-error {{invalid application of 'sizeof' to bit-field}}
54 (void) sizeof((t->bitY)); // expected-error {{invalid application of 'sizeof' to bit-field}}
55 (void) sizeof(t->bitX = 4); // not a bitfield designator in C
56 (void) sizeof(t->bitX += 4); // not a bitfield designator in C
57 (void) sizeof((void) 0, t->bitX); // not a bitfield designator in C
58 (void) sizeof(t->var ? t->bitX : t->bitY); // not a bitfield designator in C
59 (void) sizeof(t->var ? t->bitX : t->bitX); // not a bitfield designator in C
62 typedef unsigned Unsigned;
63 typedef signed Signed;
65 struct Test5 { unsigned n : 2; } t5;
66 // Bitfield is unsigned
67 struct Test5 sometest5 = {-1};
68 typedef __typeof__(+t5.n) Signed; // ... but promotes to signed.
70 typedef __typeof__(t5.n + 0) Signed; // Arithmetic promotes.
72 typedef __typeof__(+(t5.n = 0)) Signed; // FIXME: Assignment should not; the result
73 typedef __typeof__(+(t5.n += 0)) Signed; // is a non-bit-field lvalue of type unsigned.
74 typedef __typeof__(+(t5.n *= 0)) Signed;
76 typedef __typeof__(+(++t5.n)) Signed; // FIXME: Increment is equivalent to compound-assignment.
77 typedef __typeof__(+(--t5.n)) Signed; // This should not promote to signed.
79 typedef __typeof__(+(t5.n++)) Unsigned; // Post-increment is underspecified, but seems to
80 typedef __typeof__(+(t5.n--)) Unsigned; // also act like compound-assignment.
83 : 0.0; // expected-error{{type name requires a specifier or qualifier}}