Struct serde_json::map::OccupiedEntry[][src]

pub struct OccupiedEntry<'a> { /* fields omitted */ }
Expand description

An occupied Entry. It is part of the Entry enum.

Implementations

Gets a reference to the key in the entry.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));

match map.entry("serde") {
    Entry::Occupied(occupied) => {
        assert_eq!(occupied.key(), &"serde");
    }
    Entry::Vacant(_) => unimplemented!(),
}

Gets a reference to the value in the entry.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));

match map.entry("serde") {
    Entry::Occupied(occupied) => {
        assert_eq!(occupied.get(), 12);
    }
    Entry::Vacant(_) => unimplemented!(),
}

Gets a mutable reference to the value in the entry.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!([1, 2, 3]));

match map.entry("serde") {
    Entry::Occupied(mut occupied) => {
        occupied.get_mut().as_array_mut().unwrap().push(json!(4));
    }
    Entry::Vacant(_) => unimplemented!(),
}

assert_eq!(map["serde"].as_array().unwrap().len(), 4);

Converts the entry into a mutable reference to its value.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!([1, 2, 3]));

match map.entry("serde") {
    Entry::Occupied(mut occupied) => {
        occupied.into_mut().as_array_mut().unwrap().push(json!(4));
    }
    Entry::Vacant(_) => unimplemented!(),
}

assert_eq!(map["serde"].as_array().unwrap().len(), 4);

Sets the value of the entry with the OccupiedEntry’s key, and returns the entry’s old value.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));

match map.entry("serde") {
    Entry::Occupied(mut occupied) => {
        assert_eq!(occupied.insert(json!(13)), 12);
        assert_eq!(occupied.get(), 13);
    }
    Entry::Vacant(_) => unimplemented!(),
}

Takes the value of the entry out of the map, and returns it.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();
map.insert("serde".to_owned(), json!(12));

match map.entry("serde") {
    Entry::Occupied(occupied) => {
        assert_eq!(occupied.remove(), 12);
    }
    Entry::Vacant(_) => unimplemented!(),
}

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.