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FGL extension for FPC 2.6.4

As Free Pascal 2.6.4 distribution does not include generic tree implementation (there are some limitation of compiler), I use my own named FGLExt for different purposes.

Here are 2 files in repository:

  • fglext.pas - implements TFPGTree, TFPGTreeNode and TFPGStack classes
  • fglexttest.pas - some unit tests for it and use cases

As I know, Free Pascal 3.x will be more generic-friendly so the more usable implementation of TFPGTreeNode may be done.