60 lines
2.5 KiB
C++
60 lines
2.5 KiB
C++
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-windows-msvc -verify %s -Wbitfield-enum-conversion
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// RUN: %clang_cc1 -std=c++11 -triple x86_64-linux -verify %s -Wbitfield-enum-conversion
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enum TwoBits { Hi1 = 3 } two_bits;
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enum TwoBitsSigned { Lo2 = -2, Hi2 = 1 } two_bits_signed;
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enum ThreeBits { Hi3 = 7 } three_bits;
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enum ThreeBitsSigned { Lo4 = -4, Hi4 = 3 } three_bits_signed;
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enum TwoBitsFixed : unsigned { Hi5 = 3 } two_bits_fixed;
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struct Foo {
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unsigned two_bits : 2; // expected-note 2 {{widen this field to 3 bits}} expected-note 2 {{type signed}}
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int two_bits_signed : 2; // expected-note 2 {{widen this field to 3 bits}} expected-note 1 {{type unsigned}}
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unsigned three_bits : 3; // expected-note 2 {{type signed}}
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int three_bits_signed : 3; // expected-note 1 {{type unsigned}}
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#ifdef _WIN32
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// expected-note@+2 {{type unsigned}}
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#endif
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ThreeBits three_bits_enum : 3;
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ThreeBits four_bits_enum : 4;
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};
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void f() {
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Foo f;
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f.two_bits = two_bits;
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f.two_bits = two_bits_signed; // expected-warning {{negative enumerators}}
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f.two_bits = three_bits; // expected-warning {{not wide enough}}
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f.two_bits = three_bits_signed; // expected-warning {{negative enumerators}} expected-warning {{not wide enough}}
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f.two_bits = two_bits_fixed;
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f.two_bits_signed = two_bits; // expected-warning {{needs an extra bit}}
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f.two_bits_signed = two_bits_signed;
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f.two_bits_signed = three_bits; // expected-warning {{not wide enough}}
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f.two_bits_signed = three_bits_signed; // expected-warning {{not wide enough}}
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f.three_bits = two_bits;
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f.three_bits = two_bits_signed; // expected-warning {{negative enumerators}}
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f.three_bits = three_bits;
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f.three_bits = three_bits_signed; // expected-warning {{negative enumerators}}
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f.three_bits_signed = two_bits;
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f.three_bits_signed = two_bits_signed;
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f.three_bits_signed = three_bits; // expected-warning {{needs an extra bit}}
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f.three_bits_signed = three_bits_signed;
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#ifdef _WIN32
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// Enums on Windows are always implicitly 'int', which is signed, so you need
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// an extra bit to store values that set the MSB. This is not true on SysV
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// platforms like Linux.
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// expected-warning@+2 {{needs an extra bit}}
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#endif
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f.three_bits_enum = three_bits;
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f.four_bits_enum = three_bits;
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// Explicit casts suppress the warning.
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f.two_bits = (unsigned)three_bits_signed;
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f.two_bits = static_cast<unsigned>(three_bits_signed);
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}
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