Struct TypeStore

pub struct TypeStore { /* private fields */ }

A generic type map for storing arbitrary data by type.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
store.insert("hello");
assert_eq!(store.get::<u32>(), Some(&1u32));
assert_eq!(store.get::<&str>(), Some(&"hello"));
assert_eq!(store.get::<u64>(), None);

Implementations

impl TypeStore

pub fn new() -> Self

Creates an empty Store.

Example

use extractors::TypeStore;

let store = TypeStore::new();
assert!(store.is_empty());

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

Insert an item into the map.

If an item of this type was already stored, it will be replaced.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
assert_eq!(store.get::<u32>(), Some(&1u32));
store.insert(2u32);
assert_eq!(store.get::<u32>(), Some(&2u32));

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

Get a reference to an item in the map. Returns None if the item is not present.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
assert_eq!(store.get::<u32>(), Some(&1u32));
assert_eq!(store.get::<u64>(), None);

pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T>

Get a mutable reference to an item in the map. Returns None if the item is not present.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
let val = store.get_mut::<u32>().unwrap();
*val = 2;
assert_eq!(store.get::<u32>(), Some(&2u32));

pub fn remove<T: 'static>(&mut self) -> Option<T>

Remove an item from the map. Returns None if the item is not present, Some(T) if it was.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
assert_eq!(store.remove::<u32>(), Some(1u32));
assert_eq!(store.remove::<u32>(), None);

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

Check if the map contains an item of type T. Returns true if it does, false if it doesn’t.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
assert!(store.contains::<u32>());
assert!(!store.contains::<u64>());

pub fn clear(&mut self)

Clear the map, removing all items.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
store.insert(1u32);
store.clear();
assert!(store.is_empty());

pub fn is_empty(&self) -> bool

Check if the map is empty. Returns true if it is, false if it isn’t.

Example

use extractors::TypeStore;

let mut store = TypeStore::new();
assert!(store.is_empty());
store.insert(1u32);
assert!(!store.is_empty());

Trait Implementations

impl Debug for TypeStore

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

Formats the value using the given formatter.

impl Default for TypeStore

fn default() -> TypeStore

Returns the “default value” for a type.