CodeUnit

classin packageklyn

public class CodeUnit implements ValueType

CodeUnit

All Implemented Interfaces: ValueType

Represents one 16-bit UTF-16 code unit.

Characters in the Basic Multilingual Plane use one CodeUnit. Supplementary Unicode characters use a surrogate pair and therefore occupy two CodeUnit values when represented as UTF-16. A \uXXXX escape denotes one code unit; a \UXXXXXXXX escape is accepted as a CodeUnit only when its value remains in the Basic Multilingual Plane. Use a String literal or an explicit surrogate pair for a supplementary character.

letter as CodeUnit = `a`
assert letter.toUpper() == `A`

high as CodeUnit = `\uD83D`
low as CodeUnit = `\uDE00`
assert String.fromCodePoint(0x1F600) == "\U0001F600"

Constructors

Modifier and Type	Member	Description
public native	CodeUnit `CodeUnit()`	Builds the neutral CodeUnit value (\u0000).
public native	CodeUnit `CodeUnit(value as Char)`	Narrows a Basic Multilingual Plane Char to one UTF-16 code unit.
public native	CodeUnit `CodeUnit(value as CodeUnit)`	Creates a CodeUnit from another CodeUnit value.
public native	CodeUnit `CodeUnit(value as Int)`	Creates a CodeUnit from a signed UTF-16 code-unit value.
public native	CodeUnit `CodeUnit(value as Long)`	Creates a CodeUnit from a signed UTF-16 code-unit value.
public native	CodeUnit `CodeUnit(value as UInt)`	Creates a CodeUnit from an unsigned UTF-16 code-unit value.
public native	CodeUnit `CodeUnit(value as ULong)`	Creates a CodeUnit from an unsigned UTF-16 code-unit value.

Methods

Modifier and Type	Member	Description
public native	isAlnum `isAlnum() as Boolean`	Determines whether a character is alphabetic or a digit.
public native	isAlpha `isAlpha() as Boolean`	Determines whether a character belongs to a Unicode alphabetic class.
public native	isDigit `isDigit() as Boolean`	Determines whether a character is a Unicode digit.
public	isSpace `isSpace() as Boolean`	Tests Unicode whitespace without converting an isolated surrogate to Char.
public native	toInt `toInt() as Int`	Returns the unsigned numeric value of this UTF-16 code unit.
public native	toLower `toLower() as CodeUnit`	Converts a character to lowercase when a lowercase mapping exists.
public override	toString `toString() as String`	Returns this UTF-16 code unit as a one-character immutable String.
public native	toUpper `toUpper() as CodeUnit`	Converts a character to uppercase when an uppercase mapping exists.