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