add visit_on_exit to iterator implementation

add depth assertion to basic tree iterator test

implement basic (enter only) tree iterator

set tree iterator stack pointer to NULL on dispose to avoid accidental double-frees

capitalize cx_array_declare()

vastly simplify tree iterators and add test for creating them

(0) -300 -100 -30 -10 -6 +6 +10 +30 tip

mercurial