Enum LinkSource 

pub enum LinkSource {
    Literal(Value),
    Variable(Uuid),
    Port(Port),
    Select {
        source: Box<LinkSource>,
        path: Key,
    },
}

Where the value feeding a Link’s target comes from.

Generalizes the behavior tree’s Expression link kinds (a literal value, a shared blackboard variable, or another node’s slot). Full expression links (arithmetic over sources) are deferred — proposal Q-D.

Variants

Literal(Value)

A constant value.

Variable(Uuid)

A shared blackboard variable, by id — the interpreter resolves it to a store slot (or a tree-local cell) at build time.

Port(Port)

Another node’s slot: the output/port the link reads from. Generalizes Expression::NodeArgument.

Select

Read a Key sub-path of another source’s value on read — a structured output’s field (by id) or an array element (by index). Selection is an operation over any source, not a property of one: Select { source: Variable(id), .. } selects into a variable, and nested Selects chain. The path segments are resolved ids, not names (the type registry maps authored field names to ids when a graph is built), so the runtime resolves nothing. See Key::select. Heavier “compute a value” operations (calls, arithmetic) are nodes, not link sources.

Fields

source: Box<LinkSource>

The source whose value is projected.

path: Key

The sub-path (Key attributes = ids) read out of that value.

Trait Implementations

impl Clone for LinkSource

fn clone(&self) -> LinkSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LinkSource

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LinkSource

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for LinkSource

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for LinkSource

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LinkSource