Struct specs::NullStorage

source ·
pub struct NullStorage<T>(_);
Expand description

A null storage type, used for cases where the component doesn’t contain any data and instead works as a simple flag.

Trait Implementations

Returns the “default value” for a type. Read more
Clean the storage given a bitset with bits set for valid indices. Allows us to safely drop the storage. Read more
Tries reading the data associated with an Index. This is unsafe because the external set used to protect this storage is absent. Read more
Tries mutating the data associated with an Index. This is unsafe because the external set used to protect this storage is absent. Read more
Inserts new data for a given Index.
Removes the data associated with an Index.
Drops the data associated with an Index.

This is safe because you cannot mutate ZSTs.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The alignment of pointer.
The type for initializers.
Initializes a with the given initializer. Read more
Dereferences the given pointer. Read more
Mutably dereferences the given pointer. Read more
Drops the object pointed to by the given pointer. Read more
Tries to create the default.
Calls try_default and panics on an error case.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.