Type of unicode ropes.

Alias.

Exception raised when trying to access a character which is outside the bounds of a rope.

The empty rope.

make length char creates a rope of length length containing only char.

singleton ch creates a rope of length 1 containing only ch.

Returns the length of the given rope.

Returns the size of the given rope.

is_empty rope returns whether str is the empty rope or not.

get rope idx returns the glyph at index idx in rope.

get_raw rope idx returns the character at raw index idx in rope.

Concatenates the two given ropes.

concat sep l concatenates all strings of l separating them by sep.

sub rope ofs len Returns the sub-rope of rope starting at ofs and of length len.

break rope pos returns the sub-ropes before and after pos in rope. It is more efficient than creating two sub-ropes with sub.

before rope pos returns the sub-rope before pos in rope.

after rope pos returns the sub-string after pos in rope.

insert rope pos sub inserts sub in rope at position pos.

insert rope pos char inserts char in rope at position pos. If char is a combing mark, it's merged to the character at position pos-1

remove rope pos len removes the len characters at position pos in rope

replace rope pos len repl replaces the len characters at position pos in rope by repl.

lchop rope returns rope without is first character. Returns empty if rope is empty.

rchop rope returns rope without is last character. Returns empty if rope is empty.

iter f rope applies f on all characters of rope starting from the left.

rev_iter f rope applies f an all characters of rope starting from the right.

fold f rope acc applies f on all characters of rope starting from the left, accumulating a value.

rev_fold f rope acc applies f on all characters of rope starting from the right, accumulating a value.

map f rope maps all characters of rope with f.

rev_map f str maps all characters of rope with f in reverse order.

iter_leaf f rope applies f on all leaves of rope starting from the left.

iter_leaf f rope applies f on all leaves of rope starting from the right.

fold f rope acc applies f on all leaves of rope starting from the left, accumulating a value.

rev_fold f rope acc applies f on all leaves of rope starting from the right, accumulating a value.

Compares two ropes (in code point order).

equal r1 r2 retuns true if r1 is equal to r2.