[Overview][Types][Classes][Procedures and functions][Index] Reference for unit 'Character' (#rtl)

TCharacter.IsLetterOrDigit

Check if a Unicode character is a letter or digit

Declaration

Source position: character.pas line 114

public class function TCharacter.IsLetterOrDigit(

  AChar: UnicodeChar

):Boolean; overload;

class function TCharacter.IsLetterOrDigit(

  const AString: UnicodeString;

  AIndex: Integer

):Boolean; overload;

Arguments

AChar

  

UTF16 Character

Function result

True if the indicated characters is a letter or digit.

Arguments

AString

  

String containing UTF-16 encoded characters

AIndex

  

Index of UTF16 encoded character in AString to be checked.

Description

IsLetterOrDigit returns True if a Unicode character has category that is one of the letter categories (ucUppercaseLetter, ucLowercaseLetter, ucTitlecaseLetter, ucModifierLetter, ucOtherLetter,ucDecimalNumber,ucLetterNumber). 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

IsControl

  

Check whether a Unicode character is a Unicode control 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.

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

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: May 14 2021