pub const DIFlags = packed struct(u32) {
    Visibility: enum(u2) { Zero, Private, Protected, Public } = .Zero,
    FwdDecl: bool = false,
    AppleBlock: bool = false,
    ReservedBit4: u1 = 0,
    Virtual: bool = false,
    Artificial: bool = false,
    Explicit: bool = false,
    Prototyped: bool = false,
    ObjcClassComplete: bool = false,
    ObjectPointer: bool = false,
    Vector: bool = false,
    StaticMember: bool = false,
    LValueReference: bool = false,
    RValueReference: bool = false,
    ExportSymbols: bool = false,
    Inheritance: enum(u2) {
        Zero,
        SingleInheritance,
        MultipleInheritance,
        VirtualInheritance,
    } = .Zero,
    IntroducedVirtual: bool = false,
    BitField: bool = false,
    NoReturn: bool = false,
    ReservedBit21: u1 = 0,
    TypePassbyValue: bool = false,
    TypePassbyReference: bool = false,
    EnumClass: bool = false,
    Thunk: bool = false,
    NonTrivial: bool = false,
    BigEndian: bool = false,
    LittleEndian: bool = false,
    AllCallsDescribed: bool = false,
    Unused: u2 = 0,

    pub fn format(
        self: DIFlags,
        comptime _: []const u8,
        _: std.fmt.FormatOptions,
        writer: anytype,
    ) @TypeOf(writer).Error!void {
        var need_pipe = false;
        inline for (@typeInfo(DIFlags).@"struct".fields) |field| {
            switch (@typeInfo(field.type)) {
                .bool => if (@field(self, field.name)) {
                    if (need_pipe) try writer.writeAll(" | ") else need_pipe = true;
                    try writer.print("DIFlag{s}", .{field.name});
                },
                .@"enum" => if (@field(self, field.name) != .Zero) {
                    if (need_pipe) try writer.writeAll(" | ") else need_pipe = true;
                    try writer.print("DIFlag{s}", .{@tagName(@field(self, field.name))});
                },
                .int => assert(@field(self, field.name) == 0),
                else => @compileError("bad field type: " ++ field.name ++ ": " ++
                    @typeName(field.type)),
            }
        }
        if (!need_pipe) try writer.writeByte('0');
    }
}