toString

pub fn toString(self: PlainDate, allocator: std.mem.Allocator, options: ToStringOptions) ![]u8 {
    var write = abi.DiplomatWrite.init(allocator);
    defer write.deinit();

    const display_cal: abi.c.DisplayCalendar = if (options.calendar_id) |cal| switch (cal) {
        .auto => @intCast(abi.c.DisplayCalendar_Auto),
        .always => @intCast(abi.c.DisplayCalendar_Always),
        .never => @intCast(abi.c.DisplayCalendar_Never),
        .critical => @intCast(abi.c.DisplayCalendar_Critical),
    } else @intCast(abi.c.DisplayCalendar_Auto);

    abi.c.temporal_rs_PlainDate_to_ixdtf_string(self._inner, display_cal, &write.inner);
    return try write.toOwnedSlice();
}