// RUN: %clang_cc1 -triple %itanium_abi_triple %s -fsyntax-only -verify=expected,pre-c23 -pedantic
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu %s -fsyntax-only -std=c23 -verify=expected -pedantic
enum e {A,
B = 42LL << 32, // pre-c23-warning {{enumerator value which exceeds the range of 'int' is a C23 extension}}
C = -4, D = 12456 };
enum f { a = -2147483648, b = 2147483647 }; // ok.
enum g { // too negative
c = -2147483649, // pre-c23-warning {{enumerator value which exceeds the range of 'int' is a C23 extension}}
d = 2147483647 };
enum h { e = -2147483648, // too pos
f = 2147483648, // pre-c23-warning {{enumerator value which exceeds the range of 'int' is a C23 extension}}
i = 0xFFFF0000 // pre-c23-warning {{too large}}
};
// minll maxull
enum x // expected-warning {{enumeration values exceed range of largest integer}}
{ y = -9223372036854775807LL-1, // pre-c23-warning {{enumerator value which exceeds the range of 'int' is a C23 extension}}
z = 9223372036854775808ULL }; // pre-c23-warning {{enumerator value which exceeds the range of 'int' is a C23 extension}}
int test(void) {
return sizeof(enum e) ;
}
enum gccForwardEnumExtension ve; // expected-warning{{ISO C forbids forward references to 'enum' types}} \
// expected-error{{tentative definition has type 'enum gccForwardEnumExtension' that is never completed}} \
// expected-note{{forward declaration of 'enum gccForwardEnumExtension'}}
int test2(int i)
{
ve + i; // expected-error{{invalid operands to binary expression}}
}
// PR2020
union u0; // expected-note {{previous use is here}}
enum u0 { U0A }; // expected-error {{use of 'u0' with tag type that does not match previous declaration}}
extern enum some_undefined_enum ve2; // expected-warning {{ISO C forbids forward references to 'enum' types}}
void test4(void) {
for (; ve2;) // expected-error {{statement requires expression of scalar type}}
;
(_Bool)ve2; // expected-error {{arithmetic or pointer type is required}}
for (; ;ve2) // expected-warning {{expression result unused}}
;
(void)ve2;
ve2; // expected-warning {{expression result unused}}
}
// PR2416
enum someenum {}; // expected-error {{use of empty enum}}
enum e0 { // expected-note {{previous definition is here}}
E0 = sizeof(enum e0 { E1 }), // expected-error {{nested redefinition}}
};
// PR3173
enum { PR3173A, PR3173B = PR3173A+50 };
// PR2753
void foo(void) {
enum xpto; // expected-warning{{ISO C forbids forward references to 'enum' types}}
enum xpto; // expected-warning{{ISO C forbids forward references to 'enum' types}}
}
typedef enum { X = 0 }; // expected-warning{{typedef requires a name}}
enum NotYetComplete { // expected-note{{definition of 'enum NotYetComplete' is not complete until the closing '}'}}
NYC1 = sizeof(enum NotYetComplete) // expected-error{{invalid application of 'sizeof' to an incomplete type 'enum NotYetComplete'}}
};
/// PR3688
struct s1 {
enum e1 (*bar)(void); // expected-warning{{ISO C forbids forward references to 'enum' types}}
};
enum e1 { YES, NO };
static enum e1 badfunc(struct s1 *q) {
return q->bar();
}
// Make sure we don't a.k.a. anonymous enums.
typedef enum {
an_enumerator = 20
} an_enum;
char * s = (an_enum) an_enumerator; // expected-error {{incompatible integer to pointer conversion initializing 'char *' with an expression of type 'an_enum'}}
// PR4515
enum PR4515 {PR4515a=1u,PR4515b=(PR4515a-2)/2};
int CheckPR4515[PR4515b==0?1:-1];
// PR7911
extern enum PR7911T PR7911V; // expected-warning{{ISO C forbids forward references to 'enum' types}}
void PR7911F(void) {
switch (PR7911V) // expected-error {{statement requires expression of integer type}}
;
}
char test5[__has_feature(enumerator_attributes) ? 1 : -1];
// PR8694
void PR8694(int* e) // expected-note {{passing argument to parameter 'e' here}}
{
}
void crash(enum E* e) // expected-warning {{declaration of 'enum E' will not be visible outside of this function}} \
// expected-warning {{ISO C forbids forward references to 'enum' types}}
{
PR8694(e); // expected-warning {{incompatible pointer types passing 'enum E *' to parameter of type 'int *'}}
}
typedef enum { NegativeShort = (short)-1 } NegativeShortEnum;
int NegativeShortTest[NegativeShort == -1 ? 1 : -1];
// PR24610
enum Color { Red, Green, Blue }; // expected-note{{previous use is here}}
typedef struct Color NewColor; // expected-error {{use of 'Color' with tag type that does not match previous declaration}}
// PR28903
// In C it is valid to define tags inside enums.
struct PR28903 {
enum {
PR28903_A = (enum {
PR28903_B,
PR28903_C = PR28903_B
})0
};
int makeStructNonEmpty;
};
static int EnumRedecl; // expected-note 2 {{previous definition is here}}
struct S {
enum {
EnumRedecl = 4 // expected-error {{redefinition of 'EnumRedecl'}}
} e;
};
union U {
enum {
EnumRedecl = 5 // expected-error {{redefinition of 'EnumRedecl'}}
} e;
};
enum PR15071 {
PR15071_One // expected-note {{previous definition is here}}
};
struct EnumRedeclStruct {
enum {
PR15071_One // expected-error {{redefinition of enumerator 'PR15071_One'}}
} e;
};
enum struct GH42372_1 { // expected-error {{expected identifier or '{'}}
One
};
// Because class is not a keyword in C, this looks like a forward declaration.
// expected-error@+4 {{expected ';' after top level declarator}}
// expected-error@+3 {{tentative definition has type 'enum class' that is never completed}}
// expected-warning@+2 {{ISO C forbids forward references to 'enum' types}}
// expected-note@+1 {{forward declaration of 'enum class'}}
enum class GH42372_2 {
One
};
enum IncOverflow {
V2 = __INT_MAX__,
V3 // pre-c23-warning {{incremented enumerator value which exceeds the range of 'int' is a C23 extension}}
};
#if __STDC_VERSION__ >= 202311L
// FIXME: GCC picks __uint128_t as the underlying type for the enumeration
// value and Clang picks unsigned long long.
enum GH59352 { // expected-warning {{enumeration values exceed range of largest integer}}
BigVal = 66666666666666666666wb
};
_Static_assert(BigVal == 66666666666666666666wb); /* expected-error {{static assertion failed due to requirement 'BigVal == 66666666666666666666wb'}}
expected-note {{expression evaluates to '11326434445538011818 == 66666666666666666666'}}
*/
_Static_assert(
_Generic(BigVal, // expected-error {{static assertion failed}}
_BitInt(67) : 0,
__INTMAX_TYPE__ : 0,
__UINTMAX_TYPE__ : 0,
long long : 0,
unsigned long long : 0,
__int128_t : 0,
__uint128_t : 1
)
);
#include <limits.h>
void fooinc23() {
enum E1 {
V1 = INT_MAX
} e1;
enum E2 {
V2 = INT_MAX,
V3
} e2;
enum E3 {
V4 = INT_MAX,
V5 = LONG_MIN
} e3;
enum E4 {
V6 = 1u,
V7 = 2wb
} e4;
_Static_assert(_Generic(V1, int : 1));
_Static_assert(_Generic(V2, int : 0, unsigned int : 1));
_Static_assert(_Generic(V3, int : 0, unsigned int : 1));
_Static_assert(_Generic(V4, int : 0, signed long : 1));
_Static_assert(_Generic(V5, int : 0, signed long : 1));
_Static_assert(_Generic(V6, int : 1));
_Static_assert(_Generic(V7, int : 1));
_Static_assert(_Generic((enum E4){}, unsigned int : 1));
}
#endif // __STDC_VERSION__ >= 202311L
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