Struct Arena 

pub struct Arena { /* private fields */ }

Arena that owns all AST nodes and tokens

Implementations

impl Arena

pub fn new() -> Self

Create a new empty arena

pub fn alloc_node(&mut self, node: AstNode) -> NodeId

Allocate a new node in the arena

pub fn get_node(&self, id: NodeId) -> &AstNode

Get a reference to a node

pub fn get_node_mut(&mut self, id: NodeId) -> &mut AstNode

Get a mutable reference to a node

pub fn alloc_token(&mut self, token: Token) -> TokenId

Allocate a new token in the arena

pub fn get_token(&self, id: TokenId) -> &Token

Get a reference to a token

pub fn pretty_print(&self, root: NodeId, indent: usize, input: &str) -> String

Pretty print the AST starting from the given node

impl Arena

pub fn visit<F>( &self, root: NodeId, f: &mut F, options: Option<&dyn Any>, ) -> VisitControl

where F: FnMut(NodeId, &AstNode, &Arena, usize, Option<&dyn Any>) -> VisitControl,

Visit all nodes depth-first starting from root.

The closure f receives (node_id, node, arena, depth, options) and returns a VisitControl to guide traversal. options is an optional caller-supplied context passed through to every invocation.

Trait Implementations

impl Default for Arena

fn default() -> Self

Returns the “default value” for a type.