Struct Extensions 

pub struct Extensions { /* private fields */ }

Type-erased extensions map for passing data to handlers.

Extensions allow router-level state and middleware-injected data to flow to tool handlers via the Extension<T> extractor.

Implementations

impl Extensions

pub fn new() -> Self

Create an empty extensions map.

pub fn insert<T: Send + Sync + 'static>(&mut self, val: T)

Insert a value into the extensions map.

If a value of the same type already exists, it is replaced.

pub fn get<T: Send + Sync + 'static>(&self) -> Option<&T>

Get a reference to a value in the extensions map.

Returns None if no value of the given type has been inserted.

pub fn contains<T: Send + Sync + 'static>(&self) -> bool

Check if the extensions map contains a value of the given type.

pub fn merge(&mut self, other: &Extensions)

Merge another extensions map into this one.

Values from other will overwrite existing values of the same type.

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.