Module StdLabels.String

module String: StringLabels

val length : string -> int

Return the length (number of characters) of the given string.

val get : string -> int -> char

String.get s n returns the character at index n in string s. You can also write s.[n] instead of String.get s n.

val set : bytes -> int -> char -> unit
Deprecated.This is a deprecated alias of BytesLabels.set.

String.set s n c modifies byte sequence s in place, replacing the byte at index n with c. You can also write s.[n] <- c instead of String.set s n c.

val create : int -> bytes
Deprecated.This is a deprecated alias of BytesLabels.create.

String.create n returns a fresh byte sequence of length n. The sequence is uninitialized and contains arbitrary bytes.

val make : int -> char -> string

String.make n c returns a fresh string of length n, filled with the character c.

val init : int -> f:(int -> char) -> string

init n f returns a string of length n, with character i initialized to the result of f i.

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 substring of s that starts at position start and has length len.

val fill : bytes -> pos:int -> len:int -> char -> unit
Deprecated.This is a deprecated alias of BytesLabels.fill.

String.fill s start len c modifies byte sequence s in place, replacing len bytes by c, starting at start.

val blit : src:string -> src_pos:int -> dst:bytes -> dst_pos:int -> len:int -> unit

String.blit src srcoff dst dstoff len copies len bytes from the string src, starting at index srcoff, to byte sequence dst, starting at character number dstoff.

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.

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.

val mapi : f:(int -> char -> char) -> string -> string

String.mapi f s calls f with each character of s and its index (in increasing index order) and stores the results in a new string that is returned.

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 leading nor trailing whitespace character in the argument, return the original string itself, not a copy.

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. Its inverse function is Scanf.unescaped.

val index : string -> char -> int

String.index s c returns the index of the first occurrence of character c in string s.

val index_opt : string -> char -> int option

String.index_opt s c returns the index of the first occurrence of character c in string s, or None if c does not occur in s.

val rindex : string -> char -> int

String.rindex s c returns the index of the last occurrence of character c in string s.

val rindex_opt : string -> char -> int option

String.rindex_opt s c returns the index of the last occurrence of character c in string s, or None if c does not occur in s.

val index_from : string -> int -> char -> int

String.index_from s i c returns the index of the first occurrence of character c in string s after position i. String.index s c is equivalent to String.index_from s 0 c.

val index_from_opt : string -> int -> char -> int option

String.index_from_opt s i c returns the index of the first occurrence of character c in string s after position i or None if c does not occur in s after position i.

String.index_opt s c is equivalent to String.index_from_opt s 0 c.

val rindex_from : string -> int -> char -> int

String.rindex_from s i c returns the index of the last occurrence of character c in string s before position i+1. String.rindex s c is equivalent to String.rindex_from s (String.length s - 1) c.

val rindex_from_opt : string -> int -> char -> int option

String.rindex_from_opt s i c returns the index of the last occurrence of character c in string s before position i+1 or None if c does not occur in s before position i+1.

String.rindex_opt s c is equivalent to String.rindex_from_opt 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 s after position start. String.contains s c is equivalent to String.contains_from s 0 c.

val rcontains_from : string -> int -> char -> bool

String.rcontains_from s stop c tests if character c appears in s before position stop+1.

val uppercase : string -> string
Deprecated.Functions operating on Latin-1 character set are deprecated.

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
Deprecated.Functions operating on Latin-1 character set are deprecated.

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
Deprecated.Functions operating on Latin-1 character set are deprecated.

Return a copy of the argument, with the first character set to uppercase, using the ISO Latin-1 (8859-1) character set..

val uncapitalize : string -> string
Deprecated.Functions operating on Latin-1 character set are deprecated.

Return a copy of the argument, with the first character set to lowercase, using the ISO Latin-1 (8859-1) character set..

val uppercase_ascii : string -> string

Return a copy of the argument, with all lowercase letters translated to uppercase, using the US-ASCII character set.

val lowercase_ascii : string -> string

Return a copy of the argument, with all uppercase letters translated to lowercase, using the US-ASCII character set.

val capitalize_ascii : string -> string

Return a copy of the argument, with the first character set to uppercase, using the US-ASCII character set.

val uncapitalize_ascii : string -> string

Return a copy of the argument, with the first character set to lowercase, using the US-ASCII character set.

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 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.

val equal : t -> t -> bool

The equal function for strings.

val split_on_char : sep:char -> string -> string list

String.split_on_char sep s returns the list of all (possibly empty) substrings of s that are delimited by the sep character.

The function's output is specified by the following invariants:

Iterators

val to_seq : t -> char Seq.t

Iterate on the string, in increasing index order. Modifications of the string during iteration will be reflected in the iterator.

val to_seqi : t -> (int * char) Seq.t

Iterate on the string, in increasing order, yielding indices along chars

val of_seq : char Seq.t -> t

Create a string from the generator