Module serde_json_any_key::any_key_map

source ·
Expand description

Apply the attribute #[serde(with = "any_key_map")] to de/serialize structs with nested maps that contain non-string keys.

This attribute supports any type that impls IntoIterator<Item=(&K,&V)> and FromIterator<(K,V)>.

use std::collections::HashMap;
use serde::{Serialize, Deserialize};
use serde_json::Error;
use serde_json_any_key::*;
 
#[derive(Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash, Debug)]
pub struct Test {
  pub a: i32,
  pub b: i32
}
 
#[derive(Clone, Default, Serialize, Deserialize, PartialEq, Eq, Debug)]
pub struct WithNestedMap {
  #[serde(with = "any_key_map")]
  pub struct_map: HashMap<Test, Test>,
  #[serde(with = "any_key_map")]
  pub int_map: HashMap<i32, String>
}
 
fn try_main() -> Result<(), Error> {
let mut data: WithNestedMap = Default::default();
data.struct_map.insert(Test {a: 3, b: 5}, Test {a: 7, b: 9});
data.int_map.insert(5, "foo".to_string());
 
// you can use the usual serde_json functions now
let ser = serde_json::to_string(&data).unwrap();
let deser: WithNestedMap = serde_json::from_str(&ser).unwrap();

assert_eq!(data, deser);
Ok(()) }
try_main().unwrap();

Functions§