Struct actix_http::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§
source§impl Extensions
impl Extensions
sourcepub fn new() -> Extensions
pub fn new() -> Extensions
Creates an empty Extensions
.
sourcepub fn insert<T: 'static>(&mut self, val: T) -> Option<T>
pub fn insert<T: 'static>(&mut self, val: T) -> Option<T>
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);
sourcepub fn contains<T: 'static>(&self) -> bool
pub fn contains<T: 'static>(&self) -> bool
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>());
sourcepub fn get<T: 'static>(&self) -> Option<&T>
pub fn get<T: 'static>(&self) -> Option<&T>
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));
sourcepub fn get_mut<T: 'static>(&mut self) -> Option<&mut T>
pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T>
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));
sourcepub fn remove<T: 'static>(&mut self) -> Option<T>
pub fn remove<T: 'static>(&mut self) -> Option<T>
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>());
sourcepub fn clear(&mut self)
pub fn clear(&mut self)
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>());
sourcepub fn extend(&mut self, other: Extensions)
pub fn extend(&mut self, other: Extensions)
Extends self with the items from another Extensions
.
Trait Implementations§
source§impl Debug for Extensions
impl Debug for Extensions
source§impl Default for Extensions
impl Default for Extensions
source§fn default() -> Extensions
fn default() -> Extensions
Returns the “default value” for a type. Read more
Auto Trait Implementations§
impl Freeze for Extensions
impl !RefUnwindSafe for Extensions
impl !Send for Extensions
impl !Sync for Extensions
impl Unpin for Extensions
impl !UnwindSafe for Extensions
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more