Enum Cost 

pub enum Cost {
    Borrow,
    Adopt,
    Decode,
    Copy,
    Materialize,
}

The data-movement cost attached to an input or operation.

Variants

Borrow

Reuses storage owned elsewhere for the duration of execution.

Adopt

Retains compatible owner-backed storage without copying it.

Decode

Converts an encoded representation into native storage.

Copy

Duplicates an existing native representation.

Materialize

Gathers or computes a new representation on explicit request.

Trait Implementations

impl Clone for Cost

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Cost

impl Debug for Cost

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

Formats the value using the given formatter.

impl Display for Cost

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

Formats the value using the given formatter.

impl Eq for Cost

impl Hash for Cost

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Cost

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Cost