Struct RequestExtensions

pub struct RequestExtensions(/* private fields */);

Read-only copy of the parent request extensions.

This extension can be made available as part of a response.

Methods from Deref<Target = Extensions>

pub fn get<T>(&self) -> Option<&T>

where T: Send + Sync + 'static,

Get a reference to a type previously inserted on this Extensions.

Example

let mut ext = Extensions::new();
assert!(ext.get::<i32>().is_none());
ext.insert(5i32);

assert_eq!(ext.get::<i32>(), Some(&5i32));

pub fn is_empty(&self) -> bool

Check whether the extension set is empty or not.

Example

let mut ext = Extensions::new();
assert!(ext.is_empty());
ext.insert(5i32);
assert!(!ext.is_empty());

pub fn len(&self) -> usize

Get the number of extensions available.

Example

let mut ext = Extensions::new();
assert_eq!(ext.len(), 0);
ext.insert(5i32);
assert_eq!(ext.len(), 1);

Trait Implementations

impl Clone for RequestExtensions

fn clone(&self) -> RequestExtensions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RequestExtensions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Deref for RequestExtensions

type Target = Extensions

The resulting type after dereferencing.

fn deref(&self) -> &<RequestExtensions as Deref>::Target

Dereferences the value.

impl From<Extensions> for RequestExtensions

fn from(value: Extensions) -> RequestExtensions

Converts to this type from the input type.