Trait Meta 

pub trait Meta:
    Debug
    + Clone
    + PartialEq
    + Default {
    // Required methods
    fn is_empty(&self) -> bool;
    fn compose(&mut self, other: &Self, type_pair: (DeltaType, DeltaType));
    fn is_mergeable(&self, other: &Self) -> bool;
    fn merge(&mut self, other: &Self);

    // Provided methods
    fn empty() -> Self { ... }
    fn take(&mut self, other: &Self) -> Self { ... }
}

The metadata of a DeltaItem If empty metadata is used to override the older one, we will remove the metadata into None

Required Methods

fn is_empty(&self) -> bool

fn compose(&mut self, other: &Self, type_pair: (DeltaType, DeltaType))

this is used when composing two DeltaItems with the same length

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

fn merge(&mut self, other: &Self)

This is used when we merge two DeltaItems. And it’s guaranteed that Meta::is_mergeable is true

Provided Methods

fn empty() -> Self

fn take(&mut self, other: &Self) -> Self

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Meta for ()

fn empty() -> Self

fn is_empty(&self) -> bool

fn compose(&mut self, _other: &Self, _type_pair: (DeltaType, DeltaType))

fn is_mergeable(&self, _other: &Self) -> bool

fn merge(&mut self, _other: &Self)

Implementors

impl Meta for ListDeltaMeta

impl Meta for TextMeta

impl Meta for StyleMeta