Am 2013-03-03 13:49, schrieb Xiangrong Fang:
Hi Sven,
{$mode objfpc}{$H+}
TConfiguration = packed record
DataFolder: string;
end;
does not work, but:
A (Ansi)string in {$H+} mode is just a pointer (to the characters of the
string). So sizeof(DataFolder)=4 (or 8) in all cases. There is no room for the
string unless you configure it with SetLength(DataFolder,MaxPathLen). But even
then the record does not store the characters. It only stores the pointer to
the string:
DataFolder = pointer
DataFolder[1] = DataFolder^[1] = first character of the string.
There is an automatic dereferenciation that allows to write DataFolder[x]
although the logic would require DataFolder^[1].
--
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