I have read this. My question is not about how to write enumerator, but how to do this for TREEs
Xiangrong Fang: Please anser to a message instead of creating a new thread !
There might be no necessary sort order of a tree. So you first need to invent a usable sort order and set up the enumerator accordingly. An Enumerator can work on any sort order it only needs to be strict. Regarding performance it is essential to use a sort order that allows for quickly finding the elements one after the other. -Michael _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal