I tried to test recursive function objects and implemented a n'th factorial example.
http://www.scirra.com/phpBB3/download/file.php?id=409
but it fails
Is it possible to implement recursive functions with the function objects?
It was a bug. You can recurse with ordinary "call function" actions, but not expressions. It's fixed in the next build, so your example will work then.
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I actually also had problems doing recursion with ordinary call function actions. I threw the example away so I will see if i can recreate it again.