Struct Change 

pub struct Change {
    pub before: Option<GffValue>,
    pub current: Option<GffValue>,
}

What happened at one address, from open until now.

before is what was there when the document was opened, not what was there last time. An editor’s review pane shows a user what saving would do to the file they opened, and a chain of intermediate values is not that.

None on either side means the address held nothing: absent before an insert, absent after a remove.

Fields

before: Option<GffValue>

What the opened file held there.

current: Option<GffValue>

What it holds there now.

Trait Implementations

impl Clone for Change

fn clone(&self) -> Change

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Change

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

Formats the value using the given formatter.

impl PartialEq for Change

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Change