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