Struct otter::prelude::otter_base::crates::serde_json::map::OccupiedEntry

source · [−]
pub struct OccupiedEntry<'a> { /* private fields */ }
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

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Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Should always be Self

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.