Struct serde_json::map::VacantEntry[][src]

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

A vacant Entry. It is part of the Entry enum.

Implementations

Gets a reference to the key that would be used when inserting a value through the VacantEntry.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();

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

Sets the value of the entry with the VacantEntry’s key, and returns a mutable reference to it.

Examples
use serde_json::map::Entry;

let mut map = serde_json::Map::new();

match map.entry("serde") {
    Entry::Vacant(vacant) => {
        vacant.insert(json!("hoho"));
    }
    Entry::Occupied(_) => unimplemented!(),
}

Auto Trait Implementations

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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.