Enum ParseTree 

pub enum ParseTree {
    Rule(RuleNode),
    Terminal(TerminalNode),
    Error(ErrorNode),
}

Variants

Rule(RuleNode)

Terminal(TerminalNode)

Error(ErrorNode)

Implementations

impl ParseTree

pub fn text(&self) -> String

pub fn to_string_tree<S: AsRef<str>>(&self, rule_names: &[S]) -> String

pub fn first_rule(&self, rule_index: usize) -> Option<&Self>

Finds the first rule node with rule_index in a depth-first walk.

pub fn first_rule_stop(&self, rule_index: usize) -> Option<&CommonToken>

Finds the stop token for the first rule node with rule_index.

pub fn first_rule_int_return( &self, rule_index: usize, name: &str, ) -> Option<i64>

Reads an integer return value from the first rule node with rule_index, matching ANTLR’s $label.value resolution for labeled rule references in the runtime testsuite.

pub fn first_error_token(&self) -> Option<&CommonToken>

Finds the first recovery error token in a depth-first walk.

pub fn rule_invocation_stack<S: AsRef<str>>( &self, rule_index: usize, rule_names: &[S], ) -> Option<Vec<String>>

Returns the first rule invocation stack for rule_index, ordered from the selected rule outward to the root rule.

Trait Implementations

impl Clone for ParseTree

fn clone(&self) -> ParseTree

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseTree

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

Formats the value using the given formatter.

impl Eq for ParseTree

impl PartialEq for ParseTree

fn eq(&self, other: &ParseTree) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ParseTree