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// RUN: %clang_cc1 -triple %itanium_abi_triple -verify -fsyntax-only -std=c11 -Wassign-enum %s
enum __attribute__((flag_enum)) flag {
ea = 0x1,
eb = 0x2,
ec = 0x8,
};
enum __attribute__((flag_enum)) flag2 {
ga = 0x1,
gb = 0x4,
gc = 0x5, // no-warning
gd = 0x7, // expected-warning {{enumeration value 'gd' is out of range}}
ge = ~0x2, // expected-warning {{enumeration value 'ge' is out of range}}
gf = ~0x4, // no-warning
gg = ~0x1, // no-warning
gh = ~0x5, // no-warning
gi = ~0x11, // expected-warning {{enumeration value 'gi' is out of range}}
};
enum __attribute__((flag_enum)) flag3 {
fa = 0x1,
fb = ~0x1u, // no-warning
};
// What happens here is that ~0x2 is negative, and so the enum must be signed.
// But ~0x1u is unsigned and has the high bit set, so the enum must be 64-bit.
// The result is that ~0x1u does not have high bits set, and so it is considered
// to be an invalid value. See Sema::IsValueInFlagEnum in SemaDecl.cpp for more
// discussion.
enum __attribute__((flag_enum)) flag4 {
ha = 0x1,
hb = 0x2,
hc = ~0x1u, // expected-warning {{enumeration value 'hc' is out of range}}
hd = ~0x2, // no-warning
};
void f(void) {
enum flag e = 0; // no-warning
e = 0x1; // no-warning
e = 0x3; // no-warning
e = 0xa; // no-warning
e = 0x4; // expected-warning {{integer constant not in range of enumerated type}}
e = 0xf; // expected-warning {{integer constant not in range of enumerated type}}
e = ~0; // no-warning
e = ~0x1; // no-warning
e = ~0x2; // no-warning
e = ~0x3; // no-warning
e = ~0x4; // expected-warning {{integer constant not in range of enumerated type}}
switch (e) {
case 0: break; // no-warning
case 0x1: break; // no-warning
case 0x3: break; // no-warning
case 0xa: break; // no-warning
case 0x4: break; // expected-warning {{case value not in enumerated type}}
case 0xf: break; // expected-warning {{case value not in enumerated type}}
case ~0: break; // expected-warning {{case value not in enumerated type}}
case ~0x1: break; // expected-warning {{case value not in enumerated type}}
case ~0x2: break; // expected-warning {{case value not in enumerated type}}
case ~0x3: break; // expected-warning {{case value not in enumerated type}}
case ~0x4: break; // expected-warning {{case value not in enumerated type}}
default: break;
}
enum flag2 f = ~0x1; // no-warning
f = ~0x1u; // no-warning
enum flag4 h = ~0x1; // no-warning
h = ~0x1u; // expected-warning {{integer constant not in range of enumerated type}}
}
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