Struct Override 

pub struct Override {
    pub ref_id: String,
    pub spans: Option<Vec<TextSpan>>,
    pub fill: Option<PropertyValue>,
    pub visible: Option<bool>,
    pub source_span: Option<Span>,
}

An instance-local override applied to a single descendant of the referenced component when an InstanceNode is expanded at compile time.

An override is an override ref="<local-descendant-id>" { … } child of an instance. ref_id names a descendant by its component-LOCAL id (the id as declared inside the ComponentDef, before instance-id prefixing).

v0 supported override set (documented; richer overrides are a follow-up):

• spans — replaces the target text node’s spans wholesale (the override’s span children become the target’s new spans).
• fill — replaces the target node’s fill visual property.
• visible — replaces the target node’s visible flag.

Each field is None when the override does not touch that aspect; a None field leaves the corresponding property on the cloned target untouched.

Fields

ref_id: String

The component-LOCAL id of the descendant this override targets.

spans: Option<Vec<TextSpan>>

Replacement text spans (only meaningful for a text target).

fill: Option<PropertyValue>

Replacement fill (color token ref or literal — validated like any fill).

visible: Option<bool>

Replacement visibility flag.

source_span: Option<Span>

Source declaration span, when available.

Trait Implementations

impl Clone for Override

fn clone(&self) -> Override

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Override

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

Formats the value using the given formatter.

impl PartialEq for Override

fn eq(&self, other: &Override) -> 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 Override