reem/ rust-typemap
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Description
A typesafe store keyed by types and containing different types of values.
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TypeMap
A typesafe store keyed by types and containing different types of values.
Documentation
It provides functionality similar to AnyMap, but is more flexible because it allows for key-value pairs, rather than enforcing that keys and values are the same type.
Key-value associations are defined through the
Keytrait, which uses an associated type parameter and trait coherence rules to enforce the invariants of
TypeMap.
Example
extern crate typemap;
use typemap::{TypeMap, Key};
struct KeyType;
#[derive(Debug, PartialEq)]
struct Value(i32);
impl Key for KeyType { type Value = Value; }
#[test] fn test_pairing() {
let mut map = TypeMap::new();
map.insert::(Value(42));
assert_eq!(*map.get::().unwrap(), Value(42));
}