On Fri, December 23, 2011 07:24, Jürgen Hestermann wrote: > Timothy Groves schrieb: >> Can anyone think of a situation in which you would *have* to use >> forward declared functions? I'm trying to come up with an example for >> such for my book, and I am drawing a blank. >> > > Well, maybe this one: > > ------------------------------------------------------------------- > type SorterProcType = function (String1,String2 : shortstring) : > boolean; > function CompareIt1(String1,String2 : shortstring) : boolean; forward; > function CompareIt2(String1,String2 : shortstring) : boolean; forward; > function CompareIt3(String1,String2 : shortstring) : boolean; forward; > const SortCriteria : SortProcType = CompareIt1; > > ------------------------------------------------------------------- > > I don't know of another way that you can use one of the "CompareIt1/2/3" > functions in the const declaration for "SortCriteria" (but maybe there > is one).
In this case, you could directly include the implementation with the CompareIt* declaration (unless CompareIt1 needs to access SortCriteria too, of course - that would change the picture). Tomas _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
