#key #object #dynamic #array

any_key

Dynamically typed keys for associative arrays

2 releases

Uses old Rust 2015

0.1.1 Nov 6, 2017
0.1.0 Aug 29, 2017

#266 in #dynamic

Download history 2/week @ 2023-11-27 7/week @ 2024-02-12 31/week @ 2024-02-19 19/week @ 2024-02-26 14/week @ 2024-03-04 23/week @ 2024-03-11

88 downloads per month
Used in 4 crates (2 directly)

MIT/Apache

9KB
177 lines

any_key

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Documentation for the master branch

Dynamically typed keys for associative arrays.


lib.rs:

Dynamically typed keys for associative arrays.

Example

use std::collections::{BTreeMap, HashMap};
use any_key::{AnyHash, AnyOrd};

#[derive(PartialEq, Eq, Hash, PartialOrd, Ord)]
struct Foo;

// AnyHash can be used as a key for HashMap-like types
let mut map = HashMap::new();
map.insert(Box::new("hello") as Box<AnyHash>, 1);
map.insert(Box::new(42) as Box<AnyHash>, 2);
map.insert(Box::new(Foo) as Box<AnyHash>, 3);
assert_eq!(map.get(&(Box::new("hello") as Box<AnyHash>)), Some(&1));
assert_eq!(map.get(&(Box::new(42) as Box<AnyHash>)), Some(&2));
assert_eq!(map.get(&(Box::new(Foo) as Box<AnyHash>)), Some(&3));

// AnyOrd can be used as a key for HashMap-like types
let mut map = BTreeMap::new();
map.insert(Box::new("hello") as Box<AnyOrd>, 1);
map.insert(Box::new(42) as Box<AnyOrd>, 2);
map.insert(Box::new(Foo) as Box<AnyOrd>, 3);
assert_eq!(map.get(&(Box::new("hello") as Box<AnyOrd>)), Some(&1));
assert_eq!(map.get(&(Box::new(42) as Box<AnyOrd>)), Some(&2));
assert_eq!(map.get(&(Box::new(Foo) as Box<AnyOrd>)), Some(&3));

Dependencies

~32KB