to_string s converts the primitive string s into a standard string.

of_string s converts string s into a primitive string if its size does not exceed max_length_int, and returns None otherwise.

make i c returns a string of size min i max_length containing only the character with code c l_and 255.

length s gives the length of string s.

get s i gives the code of the character stored at index i in s. When index i is invalid, the function returns zero.

sub s off len returns the substring of s starting at offset off, and of length len, when possible. If off is not a valid offset in s, the empty string is returned. If off is a valid offset, the function returns the longest possible suffix of s that: (1) starts at off, and (2) does not have more than len characters.

cat s1 s2 returns the concatenation of s1 and of the longest prefix of s2 such that the sum of their lengths does not exceed max_length.

compare s1 s2 returns 0 if s1 and s2 are equal, a number less than 0 if s1 is smaller than s2, and a number greater than 0 if s1 is greater than s2.

equal s1 s2 indicates whether s1 and s2 are equal.

hash s gives a hash of s, with the same value as Hashtbl.hash s.

unsafe_of_string s converts s into a primitive string without checking whether its size satisfies the length constraint. Callers of this function must ensure that length s <= max_length_int, which is always the case if s was obtained via to_string. NOTE: this function is used in generated code, via compile.

compile s outputs an OCaml expression producing primitive string s.