Provided by: ocaml-nox_4.01.0-3ubuntu3.1_amd64 
NAME
StringLabels - String operations.
Module
Module StringLabels
Documentation
Module StringLabels
: sig end
String operations.
val length : string -> int
Return the length (number of characters) of the given string.
val get : string -> int -> char
String.get s n returns character number n in string s . The first character is character number 0. The
last character is character number String.length s - 1 . You can also write s.[n] instead of String.get
s n .
Raise Invalid_argument index out of bounds if n is outside the range 0 to (String.length s - 1) .
val set : string -> int -> char -> unit
String.set s n c modifies string s in place, replacing the character number n by c . You can also write
s.[n] <- c instead of String.set s n c . Raise Invalid_argument index out of bounds if n is outside the
range 0 to (String.length s - 1) .
val create : int -> string
String.create n returns a fresh string of length n . The string initially contains arbitrary characters.
Raise Invalid_argument if n < 0 or n > Sys.max_string_length .
val make : int -> char -> string
String.make n c returns a fresh string of length n , filled with the character c . Raise
Invalid_argument if n < 0 or n > Sys.max_string_length .
val copy : string -> string
Return a copy of the given string.
val sub : string -> pos:int -> len:int -> string
String.sub s start len returns a fresh string of length len , containing the characters number start to
start + len - 1 of string s . Raise Invalid_argument if start and len do not designate a valid substring
of s ; that is, if start < 0 , or len < 0 , or start + len > StringLabels.length s .
val fill : string -> pos:int -> len:int -> char -> unit
String.fill s start len c modifies string s in place, replacing the characters number start to start +
len - 1 by c . Raise Invalid_argument if start and len do not designate a valid substring of s .
val blit : src:string -> src_pos:int -> dst:string -> dst_pos:int -> len:int -> unit
String.blit src srcoff dst dstoff len copies len characters from string src , starting at character
number srcoff , to string dst , starting at character number dstoff . It works correctly even if src and
dst are the same string, and the source and destination chunks overlap. Raise Invalid_argument if srcoff
and len do not designate a valid substring of src , or if dstoff and len do not designate a valid
substring of dst .
val concat : sep:string -> string list -> string
String.concat sep sl concatenates the list of strings sl , inserting the separator string sep between
each.
val iter : f:(char -> unit) -> string -> unit
String.iter f s applies function f in turn to all the characters of s . It is equivalent to f s.[0]; f
s.[1]; ...; f s.[String.length s - 1]; () .
val iteri : f:(int -> char -> unit) -> string -> unit
Same as String.iter , but the function is applied to the index of the element as first argument (counting
from 0), and the character itself as second argument.
Since 4.00.0
val map : f:(char -> char) -> string -> string
String.map f s applies function f in turn to all the characters of s and stores the results in a new
string that is returned.
Since 4.00.0
val trim : string -> string
Return a copy of the argument, without leading and trailing whitespace. The characters regarded as
whitespace are: ' ' , '\012' , '\n' , '\r' , and '\t' . If there is no whitespace character in the
argument, return the original string itself, not a copy.
Since 4.00.0
val escaped : string -> string
Return a copy of the argument, with special characters represented by escape sequences, following the
lexical conventions of OCaml. If there is no special character in the argument, return the original
string itself, not a copy.
val index : string -> char -> int
String.index s c returns the position of the leftmost occurrence of character c in string s . Raise
Not_found if c does not occur in s .
val rindex : string -> char -> int
String.rindex s c returns the position of the rightmost occurrence of character c in string s . Raise
Not_found if c does not occur in s .
val index_from : string -> int -> char -> int
Same as StringLabels.index , but start searching at the character position given as second argument.
String.index s c is equivalent to String.index_from s 0 c .
val rindex_from : string -> int -> char -> int
Same as StringLabels.rindex , but start searching at the character position given as second argument.
String.rindex s c is equivalent to String.rindex_from s (String.length s - 1) c .
val contains : string -> char -> bool
String.contains s c tests if character c appears in the string s .
val contains_from : string -> int -> char -> bool
String.contains_from s start c tests if character c appears in the substring of s starting from start to
the end of s . Raise Invalid_argument if start is not a valid index of s .
val rcontains_from : string -> int -> char -> bool
String.rcontains_from s stop c tests if character c appears in the substring of s starting from the
beginning of s to index stop . Raise Invalid_argument if stop is not a valid index of s .
val uppercase : string -> string
Return a copy of the argument, with all lowercase letters translated to uppercase, including accented
letters of the ISO Latin-1 (8859-1) character set.
val lowercase : string -> string
Return a copy of the argument, with all uppercase letters translated to lowercase, including accented
letters of the ISO Latin-1 (8859-1) character set.
val capitalize : string -> string
Return a copy of the argument, with the first character set to uppercase.
val uncapitalize : string -> string
Return a copy of the argument, with the first character set to lowercase.
type t = string
An alias for the type of strings.
val compare : t -> t -> int
The comparison function for strings, with the same specification as Pervasives.compare . Along with the
type t , this function compare allows the module String to be passed as argument to the functors Set.Make
and Map.Make .