module UChar: sig .. end
Unicode (ISO-UCS) characters.
This module implements Unicode (actually ISO-UCS) characters. All
31-bit code points are allowed.
type
Unicode characters. All 31bit code points are allowed.
exception Out_of_range
char_of u returns the Latin-1 representation of u.
If u can not be represented by Latin-1, raises Out_of_range
val char_of : t -> char
of_char c returns the Unicode character of the Latin-1 character c
val of_char : char -> t
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 code : t -> int
code n returns the Unicode character with the code number n.
If n >= 2^32 or n < 0, raises invalid_arg
val chr : int -> t
uint_code u returns the Unicode code number of u.
The returned int is unsigned, that is, on 32-bits platforms,
the sign bit is used for storing the 31-th bit of the code number.
val uint_code : t -> int
chr_of_uint n returns the Unicode character of the code number n.
n is interpreted as unsigned, that is, on 32-bits platforms,
the sign bit is treated as the 31-th bit of the code number.
If n exceed 31-bits values, then raise invalid_arg.
val chr_of_uint : int -> t
Equality by code point comparison
val eq : t -> t -> bool
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.
val compare : t -> t -> int
Aliases of type t
type t
Alias of uint_code
val int_of : uchar -> int
Alias of chr_of_uint
val of_int : int -> uchar