from

pub fn from(info: anytype) !PlainDate {
    const T = @TypeOf(info);

    if (T == PlainDate) return info.clone();

    const type_info = @typeInfo(T);
    switch (type_info) {
        .pointer => {
            const ptr = type_info.pointer;
            const ChildType = switch (@typeInfo(ptr.child)) {
                .array => |arr| arr.child,
                else => ptr.child,
            };

            if (ChildType == u8) return fromUtf8(info);
            if (ChildType == u16) return fromUtf16(info);
        },
        else => @compileError("from() expects a PlainDate, []const u8, or []const u16"),
    }
}