Reference for package '#rtl'

TCharacter.IsHighSurrogate

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

Declaration

Source position: character.pas line 104

public 
  class function IsHighSurrogate(AChar: UnicodeChar) : Boolean;  Overload
                                ;  Static;
  class function IsHighSurrogate(const AString: UnicodeString; 
                                AIndex: Integer) : Boolean;  Overload
                                ;  Static;

Description

IsHighSurrogate returns True if a Unicode character has category ucSurrogate and is in the high range of the surrogate characters (between HIGH_SURROGATE_BEGIN and HIGH_SURROGATE_END). 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

Name Description
EArgumentException Invalid argument passed to a function
IsControl Check whether a Unicode character is a Unicode control character
IsDigit Check whether a Unicode character is a digit
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
IsLowSurrogate Check whether a Unicode character is a surrogate in the low range
IsNumber Check if a Unicode character is a number
IsPunctuation Check if a Unicode character is a punctuation character
IsSurrogate Check whether a Unicode character is a surrogate
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