Struct Action 

pub struct Action(/* private fields */);

A LALR action cell, packed into a u32 (POC-proven encoding): Action::NONE = u32::MAX; high bit set = reduce (low 31 bits = rule index); high bit clear = shift/goto target state. A repr(transparent) newtype so a cell can’t be used as a bare integer (indexed with, arithmetic’d) — the packed word is reachable only through the constructors/queries below.

Implementations

impl Action

pub const NONE: Action

The absent-action sentinel (all ones — the top of the reduce half, so it steals no shift-target id and no reachable rule id).

pub fn is_none(self) -> bool

pub fn is_reduce(self) -> bool

pub fn shift_target(self) -> usize

pub fn rule_id(self) -> RuleId

Trait Implementations

impl Clone for Action

fn clone(&self) -> Action

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Action

impl Debug for Action

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

Formats the value using the given formatter.

impl Eq for Action

impl Hash for Action

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Action

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Action