Struct ClosureData 

pub struct ClosureData {
    pub params: Vec<String>,
    pub body: Arc<Node>,
    pub captured_env: Arc<Scope>,
}

Inline payload for Value::Closure, boxed out of the enum so the Value discriminant width is governed by the cheap variants. The closure body (Node) plus captured scope dwarf the other variants by tens of bytes — keeping them inline widens every Value on the stack, every HashMap bucket holding Value, and every list slot.

Fields

params: Vec<String>

body: Arc<Node>

P2-2: closure body shared via Arc<Node> so xs.map(f) and Value::Closure::clone() only bump the body’s refcount instead of deep-cloning the AST per element. The reference shape (&closure.body) keeps existing consumers source-compatible — Arc<Node> auto-derefs to &Node for eval_node calls.

captured_env: Arc<Scope>

Trait Implementations

impl Clone for ClosureData

fn clone(&self) -> ClosureData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ClosureData

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

Formats the value using the given formatter.