Hi, I'm trying to implement an interval tree based on boost::intrusive::rbtree. For such an interval tree, certain fixup operations must be run after a node rotation. Now, as far as I can see from the code (looking at rotate_* in bstree_algorithms), there is no way of "hooking into"[0] these methods, right? Am I missing something? What I need: After every operation that changes the parent-child-relationship of nodes I need to touch all involved nodes. At this point, I'm considering monkey-patching bstree_algorithms using some preprocessor directives, but that is bound to fail spectacularly. Any better ideas? Kind regards, and thanks for any help, Lukas [0] I know the term "hook" is overloaded differently with intrusive, but I can't think of a better term.