next_to_while()

next_cycle()

next_to_until()

next_to_while()

next_to_offset_cycle()

Arithmetical

CURSOR

next()

jump()

next_to_pos()

next_to_offset()

next_to_left()

next_to_right()

jump_to_offset()

jump_to_first()

jump_to_last()

jump_to_load()

=

item_size()
range()
len()
is_empty()
is_init()
noeffects()
noeffects_on()
noeffects_off()
backwards()
turnaround()
head_to_left()
head_to_right()
head_to_pos()
pos()
extras()
extras_mut()
to_extras()
to_range_extras()
reset()
save()
saved()
load()
as_slice()
as_slice_loaded()
as_left_side_slice()
as_right_side_slice()
as_preserved_slice()
as_remaining_slice()
current()
clone()
prev()
first_to_last()

pos() starts at -1

pos() starts at 0

will change
the head direction
(= backwards())

will not change
the head direction

next_to_first()

next_to_last()

jump_cycle()

next_to_offset_cycle()

next_to_load()

next_to_until()