Enum FoldScope 

pub enum FoldScope {
    Reuse,
    Once,
}

Whether a fold is allowed to evaluate Volatile functions.

Reuse is plan-time folding whose result outlives this execution, so a volatile call is never evaluated. Once is folding for a plan that is itself marked volatile and never cached, so the call is evaluated here and re-evaluated on the next execution’s re-plan.

Variants

Reuse

The folded value can be reused by a later execution.

Once

The folded value serves this execution only.

Trait Implementations

impl Clone for FoldScope

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 FoldScope

impl Debug for FoldScope

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

Formats the value using the given formatter.

impl Eq for FoldScope

impl PartialEq for FoldScope

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FoldScope