Enum Entry

pub enum Entry<'a, T>
where
    T: 'a,
{
    Occupied(OccupiedEntry<'a, T>),
    Vacant(VacantEntry<'a, T>),
}

A view into a single location in a HeaderMap, which may be vacant or occupied.

Variants

Occupied(OccupiedEntry<'a, T>)

An occupied entry

Vacant(VacantEntry<'a, T>)

A vacant entry

Implementations

impl<'a, T> Entry<'a, T>

pub fn or_insert(self, default: T) -> &'a mut T

Ensures a value is in the entry by inserting the default if empty.

Returns a mutable reference to the first value in the entry.

Panics

This method panics if capacity exceeds max HeaderMap capacity

Examples

let mut map: HeaderMap<u32> = HeaderMap::default();

let headers = &[
    "content-length",
    "x-hello",
    "Content-Length",