Struct typemap::TypeMap

pub struct TypeMap<A: ?Sized = UnsafeAny> where A: UnsafeAnyExt {
    // some fields omitted
}

A map keyed by types.

Can contain one value of any type for each key type, as defined by the Assoc trait.

You usually do not need to worry about the A type parameter, but it can be used to add bounds to the possible value types that can be stored in this map. Usually, you are looking for ShareMap, which is Send + Sync.

Methods

impl TypeMap

fn new() -> TypeMap

Create a new, empty TypeMap.

fn insert<K: Key>(&mut self, val: K::Value) -> Option<K::Value> where K::Value: Any

Insert a value into the map with a specified key type.

fn get<K: Key>(&self) -> Option<&K::Value> where K::Value: Any

Find a value in the map and get a reference to it.

fn get_mut<K: Key>(&mut self) -> Option<&mut K::Value> where K::Value: Any

Find a value in the map and get a mutable reference to it.

fn contains<K: Key>(&self) -> bool

Check if a key has an associated value stored in the map.

fn remove<K: Key>(&mut self) -> Option<K::Value> where K::Value: Any

Remove a value from the map.

Returns true if a value was removed.

fn entry<'a, K: Key>(&'a mut self) -> Entry<'a, K> where K::Value: Any

Get the given key's corresponding entry in the map for in-place manipulation.

unsafe fn data(&self) -> &HashMap<TypeId, Box<UnsafeAny>>

Read the underlying HashMap

unsafe fn data_mut(&mut self) -> &mut HashMap<TypeId, Box<UnsafeAny>>

Get a mutable reference to the underlying HashMap

fn len(&self) -> usize

Get the number of values stored in the map.

fn is_empty(&self) -> bool

Return true if the map contains no values.

fn clear(&mut self)

Remove all entries from the map.

Trait Implementations

impl<A: Default + ?Sized> Default for TypeMap<A> where A: UnsafeAnyExt

fn default() -> TypeMap<A>

Returns the "default value" for a type.

impl<A: ?Sized> Clone for TypeMap<A> where A: UnsafeAnyExt, Box<A>: Clone

fn clone(&self) -> TypeMap<A>

Returns a copy of the value.

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

Performs copy-assignment from source.