Crate collect_once_hashmap[−][src]
Expand description
collect-once-hashmap
This crate provides a type CollectOnceHashMap
(and the same for BTreeMap
that can be collected from an iterator just like a normal
std::collections::HashMap
, but it makes sure that a duplicated key results in
an error.
Example:
let hm = vec![(1, 1), (1, 2)]
.into_iter()
.collect::<CollectOnceHashMap<u8, u8>>()
.into_inner();
assert!(hm.is_err());
assert!(std::matches!(hm, Err(Error::DuplicatedKey(1))));
let bm = vec![(1, 1), (1, 2)]
.into_iter()
.collect::<CollectOnceBTreeMap<u8, u8>>()
.into_inner();
assert!(bm.is_err());
assert!(std::matches!(bm, Err(Error::DuplicatedKey(1))));
License
MPL-2.0 (c) Matthias Beyer