1 2 3 4 5 6 7 8 9 10 11 12 13
use std::collections::{BTreeMap, HashMap}; impl<Key, Value> Sequence for BTreeMap<Key, Value> { fn len(&self) -> usize { BTreeMap::len(self) } } impl<Key, Value> Sequence for HashMap<Key, Value> { fn len(&self) -> usize { HashMap::len(self) } }