Struct Extensions 

pub struct Extensions { /* private fields */ }

Per-request type-indexed storage shared across middleware hooks and handlers.

Implementations

impl Extensions

pub fn new() -> Self

Create a new empty extensions bag.

pub fn insert<T>(&self, value: T) -> Option<T>

where T: Send + Sync + 'static,

Insert a typed value into the bag, returning the previous value of the same type.

pub fn contains<T>(&self) -> bool

where T: Send + Sync + 'static,

Returns true if a value of type T is present.

pub fn with<T, R>(&self, f: impl FnOnce(&T) -> R) -> Option<R>

where T: Send + Sync + 'static,

Borrow a typed value from the bag for the duration of f.

pub fn with_mut<T, R>(&self, f: impl FnOnce(&mut T) -> R) -> Option<R>

where T: Send + Sync + 'static,

Mutably borrow a typed value from the bag for the duration of f.

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

where T: Clone + Send + Sync + 'static,

Clone a typed value from the bag.

Trait Implementations

impl Clone for Extensions

fn clone(&self) -> Extensions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Extensions

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

Formats the value using the given formatter.

impl Default for Extensions

fn default() -> Extensions

Returns the “default value” for a type.