[fpc-pascal] Best integer type to be used for string indexes

[Mattias Gaertner]

On Sun, 19 Jun 2011 23:57:04 +0200 (CEST)
Michael Van Canneyt <michael at freepascal.org> wrote:

>[...]
> >> Ansistring is not capable of keeping more than High(Integer) bytes.
> >
> > That's not true. At least 3*high(integer) compiles and runs fine here on
> > 64bit:
> >
> > var
> >  s: ansistring;
> > begin
> >  SetLength(s,3*High(integer));
> >  s[length(s)]:='A';
> >  s[length(s)]:='B';
> >  writeln(s[length(s)],' ',length(s));
> > end.
> >
> > I don't know where the real limit is.
> 
> Hm. I checked again.
> 
> Indeed, the hidden ansistring record contains
>    TAnsiRec = Packed Record
>      Ref,
>      Len   : SizeInt;
>      First : Char;
>    end;
> Which in fact means that the limit is the OS memory limit.

Now it is no longer hidden. ;)

Mattias