TCharacter.IsSurrogatePair

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

Declaration

Source position: character.pas line 108

public 
  class function IsSurrogatePair(const AHighSurrogate: UnicodeChar; 
                                const ALowSurrogate: UnicodeChar)
                                 : Boolean;  Overload;  Static;
  class function IsSurrogatePair(const AString: UnicodeString; 
                                AIndex: Integer) : Boolean;  Overload
                                ;  Static;

Description

IsSurrogatePair returns True if AHighSurrogate and ALowSurrogate form a valid Unicode surrogate pair. (AHighSurrogate is a high surrogate and ALowSurrogate a matching low surrogate) The character can be specified as a UTF16 character AChar or a pair of UTF16 encoded characters 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
IsHighSurrogate	Check whether a Unicode character is a surrogate in the high range
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