more prototypes for tree functions

prototypes for create and destroy functions

add allocator and root node pointer to tree structure

allow find() member function to start in an arbitrary subtree

provide a default tree node layout, but do not make it mandatory

first draft of a class for high level trees

add bounding parameter to cx_tree_add_iter()

fix misleading documentation that could have indicated that an allocator is optional for lists

(0) -300 -100 -30 -10 -8 +8 +10 +30 +100 tip

mercurial