DIFlags

    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, w: *Writer) Writer.Error!void {
            var need_pipe = false;
            const info = @typeInfo(DIFlags).@"struct";
            inline for (info.field_names, info.field_types) |field_name, field_type| {
                switch (@typeInfo(field_type)) {
                    .bool => if (@field(self, field_name)) {
                        if (need_pipe) try w.writeAll(" | ") else need_pipe = true;
                        try w.print("DIFlag{s}", .{field_name});
                    },
                    .@"enum" => if (@field(self, field_name) != .Zero) {
                        if (need_pipe) try w.writeAll(" | ") else need_pipe = true;
                        try w.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 w.writeByte('0');
        }
    }