Function from_key

pub fn from_key<T, F>(value: &Key<F>) -> Result<T, Error>
where
    T: DeserializeOwned,
    F: FloatPolicy,

Deserialize the given type from a Key.

Examples

use serde_derive::{Deserialize, Serialize};
use serde_hashkey::{from_key, to_key, Key};
use std::collections::HashMap;

#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
struct Author {
    name: String,
    age: u32,
}

#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
struct Book {
    title: String,
    author: Author,
}

let book = Book {
    title: String::from("Birds of a feather"),
    author: Author {
        name: String::from("Noah"),
        age: 42,
    },
};

let key = to_key(&book)?;
let book2 = from_key(&key)?;

assert_eq!(book, book2);

Using a non-standard float policy:

use serde_derive::{Deserialize, Serialize};
use serde_hashkey::{from_key, to_key_with_ordered_float, OrderedFloat, Key};
use std::collections::HashMap;

#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
struct Author {
    name: String,
    age: u32,
}

#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
struct Book {
    title: String,
    author: Author,
}

let book = Book {
    title: String::from("Birds of a feather"),
    author: Author {
        name: String::from("Noah"),
        age: 42,
    },
};

let key = to_key_with_ordered_float(&book)?;
let book2 = from_key(&key)?;

assert_eq!(book, book2);