[fpc-pascal] How do I do this safely?

[Alan Mead]

I am trying to write code that will compile cleanly in current and
future versions of FPC (in mode Delphi) and Delphi on 32- and 64-bit
platforms.  I need to store strings and their floating point rankings
in a list and I was advised to use the single type and store them in
the TStringList.Objects list, using a cast to store and retreive the
values.  

SL := TstringList.Create;
rank := 0.95;
title := 'This is a string';
SL.AddObject(title,pointer(rank));

This feels unsafe.. I'd hate to have to come back later to debug why
the ranks have become completely garbled on a new platform or
version.

Should I convert ranks to an integer (slightly awkward)?  Or just
create a trivial class to hold ranks as objects (seems like
overkill)? Or...?

-Alan