with

pub fn with(self: PlainMonthDay, options: WithOptions) !PlainMonthDay {
    // Build month_code view
    const month_code_view = if (options.month_code) |mc|
        abi.toDiplomatStringView(mc)
    else
        abi.c.DiplomatStringView{ .data = null, .len = 0 };

    // Build partial date with only the fields we want to modify
    const partial_date = abi.c.PartialDate{
        .year = .{ .is_ok = false },
        .month = .{ .is_ok = false },
        .day = if (options.day) |d| abi.toOption(abi.c.OptionU8, d) else .{ .is_ok = false },
        .month_code = month_code_view,
        .era = .{ .data = null, .len = 0 },
        .era_year = .{ .is_ok = false },
        .calendar = abi.c.AnyCalendarKind_Iso,
    };

    const overflow = abi.c.ArithmeticOverflow_option{
        .is_ok = true,
        .unnamed_0 = .{ .ok = abi.c.ArithmeticOverflow_Constrain },
    };

    return wrapPlainMonthDay(abi.c.temporal_rs_PlainMonthDay_with(
        self._inner,
        partial_date,
        overflow,
    ));
}