pub struct TreeSetIterator<'self, T> {
priv iter: TreeMapIterator<'self, T, ()>,
}Lazy forward iterator over a set
impl<'self, T> std::iter::Iterator for TreeSetIterator<'self, T>fn next(&mut self) -> std::option::OptionAdvance the iterator to the next node (in order). If there are no more nodes, return None.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).