Module UChar

module UChar: sig .. end
Unicode (ISO-UCS) characters.

This module implements Unicode (actually ISO-UCS) characters. All 31-bit code points are allowed.


type t 
Unicode characters. All 31-bit code points are allowed.
exception Out_of_range
val char_of : t -> char
char_of u returns the Latin-1 representation of u. If u can not be represented by Latin-1, raises Out_of_range
val of_char : char -> t
of_char c returns the Unicode character of the Latin-1 character c
val code : t -> int
code u returns the Unicode code number of u. If the value can not be represented by a positive integer, raise Out_of_range
val chr : int -> t
code n returns the Unicode character with the code number n. If n >= 2^32 or n < 0, raises invalid_arg
val uint_code : t -> int
uint_code u returns the Unicode code number of u. The returned int is unsigned, that is, on 32-bit platforms, the sign bit is used for storing the 31-th bit of the code number.
val chr_of_uint : int -> t
chr_of_uint n returns the Unicode character of the code number n. n is interpreted as unsigned, that is, on 32-bit platforms, the sign bit is treated as the 31-th bit of the code number. If n exceeds 31-bit values, then raise Invalid_arg.
val unsafe_chr_of_uint : int -> t
Unsafe version of UChar.chr_of_uint. No check of its argument is performed.
val eq : t -> t -> bool
Equality by code point comparison
val compare : t -> t -> int
compare u1 u2 returns, a value > 0 if u1 has a larger Unicode code number than u2, 0 if u1 and u2 are the same Unicode character, a value < 0 if u1 has a smaller Unicode code number than u2.
type uchar = t 
Aliases of type t
val int_of_uchar : uchar -> int
Alias of uint_code
val uchar_of_int : int -> uchar
Alias of chr_of_uint