HIGHCHARUNICODE directive (Delphi)
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|
Type |
Switch |
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Syntax |
{$HIGHCHARUNICODE ON} or {$HIGHCHARUNICODE OFF} |
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Default |
{$HIGHCHARUNICODE OFF} |
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Scope |
Local |
Remarks
The {$HIGHCHARUNICODE ON} directive controls the behavior of characters #$80 ... #$FF (#128 ... #255).
When HIGHCHARUNICODE is OFF:
- All decimal #xxx n-digit literals are parsed as AnsiChar.
- All hexadecimal #$xx 2-digit literals are parsed as AnsiChar.
- All hexadecimal #$xxxx 4-digit literals are parsed as WideChar.
When HIGHCHARUNICODE is ON:
- All literals are parsed as WideChar.
Example:
In the following example:
- (U + 0080) is a control character; it is absent on ANSI codepages (converted to '?').
- (U + 00C8) is 'È' character; it is present on the Win1252 codepage and absent on the Win1251 codepage (converted to 'E').
var
A: AnsiChar;
W: WideChar;
begin
{$HIGHCHARUNICODE OFF}
A := #$80; // Ord(A) = $80
W := #$80; // Ord(W) depends on default ANSI codepage; for example
// = $0402 for Win1251 codepage ('Ђ')
// = $20AC for Win1252 codepage ('€');
{$HIGHCHARUNICODE ON}
A := #$80; // Ord(A) = $3F ('?')
W := #$80; // Ord(W) = $80
A := #200; // Ord(A) depends on default ANSI codepage; for example
// = $45 for Win1251 codepage ('E')
// = $C8 for Win1252 codepage ('È');
W := #200; // Ord(W) = 200 ($C8)
end;