Trait Reserve 

pub trait Reserve
where
    Self: Default,
{
    // Provided method
    fn reserve(_: usize) -> Self { ... }
}

Create a data structure and reserve some amount of space for it to grow into

Examples

• Vec is Reserve, and invokes Vec::with_capacity
• tinyvec::ArrayVec is Reserve and invokes Default::default() because creating an ArrayVec automatically allocates the required space on the stack.

Provided Methods

fn reserve(_: usize) -> Self

Create an instance of the collection with a given capacity.

Used to reserve some contiguous space, e.g. Vec::with_capacity

The default implementation invokes Default::default

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<A: Array> Reserve for ArrayVec<A>

impl<T> Reserve for Vec<T>

Available on crate feature alloc only.

fn reserve(n: usize) -> Self

Implementors