Unit 'Character' Package
[Overview][Types][Classes][Procedures and functions][Index] [#rtl]

TCharacter.IsControl

Check whether a Unicode character is a Unicode control character.

Declaration

Source position: character.pas line 96

public class function TCharacter.IsControl(

  AChar: UnicodeChar

):Boolean; overload;

class function TCharacter.IsControl(

  const AString: UnicodeString;

  AIndex: Integer

):Boolean; overload;

Arguments

AChar

  

UTF16 Character.

Function result

True if the indicated character has category ucControl.

Arguments

AString

  

String containing UTF-16 encoded characters.

AIndex

  

Index of UTF16 encoded character in AString to be checked.

Description

IsControl returns True if a Unicode character has category ucControl. The character can be specified as a UTF16 character AChar or a UTF16 encoded character starting at position AIndex in string AString.

Errors

If AIndex is not a valid character index in the string AString, an EArgumentOutOfRangeException exception is raised. If the character at that position is not complete, an EArgumentException exception is raised.

See also

GetUnicodeCategory

  

Get the Unicode category of a character.

IsDigit

  

Check whether a Unicode character is a digit.

IsSurrogate

  

Check whether a Unicode character is a surrogate.

IsHighSurrogate

  

Check whether a Unicode character is a surrogate in the high range.

IsLowSurrogate

  

Check whether a Unicode character is a surrogate in the low range.

IsSurrogatePair

  

Check if a pair of characters is a set of high/low surrogate characters.

IsLetter

  

Check if a Unicode character is a letter.

IsLetterOrDigit

  

Check if a Unicode character is a letter or digit.

IsLower

  

Check if a Unicode character is a lowercase letter.

IsNumber

  

Check if a Unicode character is a number.

IsPunctuation

  

Check if a Unicode character is a punctuation character.

IsSeparator

  

Check if a Unicode character is a separator character.

IsSymbol

  

Check if a Unicode character is a symbol character.

IsUpper

  

Check whether a Unicode character is an uppercase letter.

IsWhiteSpace

  

Check whether a Unicode character is a whitespace character.


Documentation generated on: Jul 24 2023