Struct RootRef 

pub struct RootRef {
    pub node: Arc<Node>,
    pub scope: Option<Arc<Scope>>,
    pub parent_fallback: Option<Arc<Scope>>,
}

Anchor for &root lookups in a Scope.

The three fields move as a unit because they all describe one root — previously they lived as three loose Option<Arc<…>> fields on Scope (reference_root / reference_root_scope / reference_root_parent) whose relationship was only documented in prose. Bundling them here makes the invariant structural: node is always present once a root is set, and the synthesized-vs-pinned distinction is encoded in scope being Some or None.

Fields

node: Arc<Node>

AST node that &root resolves against.

scope: Option<Arc<Scope>>

Pre-built scope already pinned at node — set by the dict branch of the evaluator’s main walk once the dict being evaluated is node. When None, reference resolution synthesizes a transient root scope on demand whose parent is parent_fallback.

parent_fallback: Option<Arc<Scope>>

Parent fallback used when synthesizing the transient root scope. Today this is the closure-body bindings scope so &root inside a closure body still sees the caller’s bindings.

Implementations

impl RootRef

pub fn new(node: Arc<Node>) -> Self

Build a root anchor that has only the AST identity — no pinned scope, no parent fallback. The dict branch of the evaluator’s main walk will fill scope later if/when it enters the matching dict.

Trait Implementations

impl Clone for RootRef

fn clone(&self) -> RootRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.