Struct Tree 

pub struct Tree {
    pub data_id: DisplayId,
    pub children_start: ArenaIdx,
    pub children_len: u32,
    pub meta: MetaIdx,
}

A tree node: children live in the shared arena (slice descriptor), meta — when propagate_positions is on — in the parallel meta arena.

Fields

data_id: DisplayId

Index into ParseTable::display_names — or an Earley ambiguity sentinel (AMBIG_DATA_ID/IAMBIG_DATA_ID/INTER_DATA_ID); resolve via ParseTable::data_name, never by indexing directly.

children_start: ArenaIdx

children_len: u32

meta: MetaIdx

Index into ParsedTree::meta_arena, MetaIdx::NONE = no meta computed (off-mode). Off-mode trees carry no per-node cost beyond this field.

Trait Implementations

impl Clone for Tree

fn clone(&self) -> Tree

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Tree

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

Formats the value using the given formatter.