Struct anymap::raw::RawMap

pub struct RawMap<A: ?Sized + UncheckedAnyExt = Any> { /* fields omitted */ }

The raw, underlying form of a Map.

At its essence, this is a wrapper around HashMap<TypeId, Box<Any>>, with the portions that would be memory-unsafe removed or marked unsafe. Normal people are expected to use the safe Map interface instead, but there is the occasional use for this such as iteration over the contents of an Map. However, because you will then be dealing with Any trait objects, it doesn’t tend to be so very useful. Still, if you need it, it’s here.

Methods

impl<A: ?Sized + UncheckedAnyExt> RawMap<A>

fn new() -> RawMap<A>

Create an empty collection.

fn with_capacity(capacity: usize) -> RawMap<A>

Creates an empty collection with the given initial capacity.

fn capacity(&self) -> usize

Returns the number of elements the collection can hold without reallocating.

fn reserve(&mut self, additional: usize)

Reserves capacity for at least additional more elements to be inserted in the collection. The collection may reserve more space to avoid frequent reallocations.

Panics

Panics if the new allocation size overflows usize.

fn shrink_to_fit(&mut self)

Shrinks the capacity of the collection as much as possible. It will drop down as much as possible while maintaining the internal rules and possibly leaving some space in accordance with the resize policy.

fn len(&self) -> usize

Returns the number of items in the collection.

fn is_empty(&self) -> bool

Returns true if there are no items in the collection.

fn clear(&mut self)

Removes all items from the collection. Keeps the allocated memory for reuse.

impl<A: ?Sized + UncheckedAnyExt> RawMap<A>

fn iter(&self) -> Iter<A>

An iterator visiting all entries in arbitrary order.

Iterator element type is &Any.

fn iter_mut(&mut self) -> IterMut<A>

An iterator visiting all entries in arbitrary order.

Iterator element type is &mut Any.

fn drain(&mut self) -> Drain<A>

Clears the map, returning all items as an iterator.

Iterator element type is Box<Any>.

Keeps the allocated memory for reuse.

fn entry(&mut self, key: TypeId) -> Entry<A>

Gets the entry for the given type in the collection for in-place manipulation.

fn get<Q: ?Sized>(&self, k: &Q) -> Option<&A> where
    TypeId: Borrow<Q>,
    Q: Hash + Eq, 

Returns a reference to the value corresponding to the key.

The key may be any borrowed form of the map's key type, but Hash and Eq on the borrowed form must match those for the key type.

fn contains_key<Q: ?Sized>(&self, k: &Q) -> bool where
    TypeId: Borrow<Q>,
    Q: Hash + Eq, 

Returns true if the map contains a value for the specified key.

The key may be any borrowed form of the map's key type, but Hash and Eq on the borrowed form must match those for the key type.

fn get_mut<Q: ?Sized>(&mut self, k: &Q) -> Option<&mut A> where
    TypeId: Borrow<Q>,
    Q: Hash + Eq, 

Returns a mutable reference to the value corresponding to the key.

The key may be any borrowed form of the map's key type, but Hash and Eq on the borrowed form must match those for the key type.

unsafe fn insert(&mut self, key: TypeId, value: Box<A>) -> Option<Box<A>>

Inserts a key-value pair from the map. If the key already had a value present in the map, that value is returned. Otherwise, None is returned.

It is the caller’s responsibility to ensure that the key corresponds with the type ID of the value. If they do not, memory safety may be violated.

fn remove<Q: ?Sized>(&mut self, k: &Q) -> Option<Box<A>> where
    TypeId: Borrow<Q>,
    Q: Hash + Eq, 

Removes a key from the map, returning the value at the key if the key was previously in the map.

The key may be any borrowed form of the map's key type, but Hash and Eq on the borrowed form must match those for the key type.

Trait Implementations

impl<A: Debug + ?Sized + UncheckedAnyExt> Debug for RawMap<A>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<A: ?Sized + UncheckedAnyExt> Clone for RawMap<A> where
    Box<A>: Clone, 

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<A: ?Sized + UncheckedAnyExt> Default for RawMap<A>

fn default() -> RawMap<A>

Returns the "default value" for a type.

impl<A: ?Sized + UncheckedAnyExt, Q> Index<Q> for RawMap<A> where
    TypeId: Borrow<Q>,
    Q: Eq + Hash, 

type Output = A

The returned type after indexing

fn index(&self, index: Q) -> &A

The method for the indexing (container[index]) operation

impl<A: ?Sized + UncheckedAnyExt, Q> IndexMut<Q> for RawMap<A> where
    TypeId: Borrow<Q>,
    Q: Eq + Hash, 

fn index_mut(&mut self, index: Q) -> &mut A

The method for the mutable indexing (container[index]) operation

impl<A: ?Sized + UncheckedAnyExt> IntoIterator for RawMap<A>

type Item = Box<A>

The type of the elements being iterated over.

type IntoIter = IntoIter<A>

Which kind of iterator are we turning this into?

fn into_iter(self) -> IntoIter<A>

Creates an iterator from a value.