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 -> charchar_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 -> tof_char c returns the Unicode character of the Latin-1 character c
val code : t -> intcode 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 -> tcode n returns the Unicode character with the code number n.
If n >= 2^32 or n < 0, raises invalid_arg
val uint_code : t -> intuint_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 -> tchr_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 -> tUnsafe version of UChar.chr_of_uint.
No check of its argument is performed.
val eq : t -> t -> boolEquality by code point comparison
val compare : t -> t -> intcompare 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.
typeuchar =t
Aliases of type t
val int_of_uchar : uchar -> intAlias of uint_code
val uchar_of_int : int -> ucharAlias of chr_of_uint