val of_ustring : string -> Type.T.t
Create a string from a unicode UTF-8 encoded string (with escape sequences already interpreted as unicode characters).
Returns the code point of the single character of the string, or
(-1) is the string is not a singleton.
Returns the singleton string whose only character is the given code point.
Evaluates the string as a decimal natural number, or
(-1) if it's not possible.
Index of the first occurrence of the second string in first one, starting at the position of the third argument.
Replace the leftmost, shortest re ocurrence.
Replace left-to-right, each shortest non empty re occurrence.