Enum MergeOrder 

pub enum MergeOrder {
    OldToNew,
    NewToOld,
}

预算合并顺序（枚举）

• 🎯用于「袋」中「相同key值预算该从哪儿合并到哪儿」的逻辑

Variants

OldToNew

从「将移出的Item」合并到「新进入的Item」

• 📌修改「新进入的Item」

NewToOld

从「新进入的Item」合并到「将移出的Item」

• 📌修改「将移出的Item」

Trait Implementations

impl Clone for MergeOrder

fn clone(&self) -> MergeOrder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MergeOrder

impl Debug for MergeOrder

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

Formats the value using the given formatter.

impl Eq for MergeOrder

impl PartialEq for MergeOrder

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MergeOrder