Struct ASTNode 

pub struct ASTNode {
    pub children: Option<Vec<ASTNode>>,
    pub token_count: u32,
    pub text: u32,
}

AST node. Grammar rules have children, tokens do not.

The total structure of the AST is defined by the grammar that it was parsed with.

Fields

children: Option<Vec<ASTNode>>

If Some, this node is a parent/nonterminal. If None, this node is a token/leaf/terminal.

token_count: u32

Due to error recovery, AST nodes can be marked as “poisoned”.

When a node is poisoned, its token count is XOR’d with !0u32 (all one-bits).

text: u32

Index into grammar.string_cache_inv, giving an Rc<String>.

For parents, it’s the name of the associated grammar rule.

For tokens, it’s the token content (the actual token contents, but what it was matched with, i.e. it’s not a regex).

Implementations

impl ASTNode

pub fn is_poisoned(&self) -> bool

pub fn get_real_token_count(&self) -> u32

Trait Implementations

impl Clone for ASTNode

fn clone(&self) -> ASTNode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ASTNode

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

Formats the value using the given formatter.

impl Default for ASTNode

fn default() -> ASTNode

Returns the “default value” for a type.