Struct ParserAction 

pub struct ParserAction { /* private fields */ }

Parser semantic action reached while recognizing one ATN path.

Generated parsers use source_state to dispatch back to the grammar action rendered for that ATN action transition. The token interval is the current rule’s input span at the action site, which covers common target templates such as $text. Rule-init actions do not have an ATN action source state, so they are marked separately and may carry an ATN state for expected-token rendering.

Implementations

impl ParserAction

pub const fn new( source_state: usize, rule_index: usize, start_index: usize, stop_index: Option<usize>, ) -> Self

Creates an action event for a recognized parser path.

pub const fn new_rule_init( rule_index: usize, start_index: usize, expected_state: Option<usize>, ) -> Self

Creates an action event for a rule-level @init action.

pub const fn source_state(&self) -> usize

ATN state that owns the semantic-action transition.

pub const fn rule_index(&self) -> usize

Grammar rule index recorded by the serialized ATN action transition.

pub const fn start_index(&self) -> usize

Token-stream index where the active rule began.

pub const fn stop_index(&self) -> Option<usize>

Last token-stream index consumed before the action was reached.

pub const fn is_rule_init(&self) -> bool

Reports whether this event represents a rule-level @init action.

pub const fn expected_state(&self) -> Option<usize>

ATN state used to compute expected-token display for this action.

Trait Implementations

impl Clone for ParserAction

fn clone(&self) -> ParserAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParserAction

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

Formats the value using the given formatter.

impl Ord for ParserAction

fn cmp(&self, other: &ParserAction) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ParserAction

fn eq(&self, other: &ParserAction) -> 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 PartialOrd for ParserAction

fn partial_cmp(&self, other: &ParserAction) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for ParserAction

impl Eq for ParserAction

impl StructuralPartialEq for ParserAction