Struct actix_web::dev::Extensions
source · [−]pub struct Extensions { /* private fields */ }
Expand description
A type map for request extensions.
All entries into this map must be owned types (or static references).
Implementations
Creates an empty Extensions
.
Insert an item into the map.
If an item of this type was already stored, it will be replaced and returned.
let mut map = Extensions::new();
assert_eq!(map.insert(""), None);
assert_eq!(map.insert(1u32), None);
assert_eq!(map.insert(2u32), Some(1u32));
assert_eq!(*map.get::<u32>().unwrap(), 2u32);
Check if map contains an item of a given type.
let mut map = Extensions::new();
assert!(!map.contains::<u32>());
assert_eq!(map.insert(1u32), None);
assert!(map.contains::<u32>());
Get a reference to an item of a given type.
let mut map = Extensions::new();
map.insert(1u32);
assert_eq!(map.get::<u32>(), Some(&1u32));
Get a mutable reference to an item of a given type.
let mut map = Extensions::new();
map.insert(1u32);
assert_eq!(map.get_mut::<u32>(), Some(&mut 1u32));
Remove an item from the map of a given type.
If an item of this type was already stored, it will be returned.
let mut map = Extensions::new();
map.insert(1u32);
assert_eq!(map.get::<u32>(), Some(&1u32));
assert_eq!(map.remove::<u32>(), Some(1u32));
assert!(!map.contains::<u32>());
Clear the Extensions
of all inserted extensions.
let mut map = Extensions::new();
map.insert(1u32);
assert!(map.contains::<u32>());
map.clear();
assert!(!map.contains::<u32>());
Extends self with the items from another Extensions
.
Trait Implementations
Returns the “default value” for a type. Read more
Auto Trait Implementations
impl !RefUnwindSafe for Extensions
impl !Send for Extensions
impl !Sync for Extensions
impl Unpin for Extensions
impl !UnwindSafe for Extensions
Blanket Implementations
Mutably borrows from an owned value. Read more
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more