Struct cfg::symbol::set::SymbolBitSet

pub struct SymbolBitSet { /* private fields */ }

A set of symbols in the form of a bit vector.

Implementations

impl SymbolBitSet

pub fn new<'a, G>(grammar: &'a G, elem: bool) -> Selfwhere G: RuleContainer + Default, &'a G: RuleContainerRef<'a, Target = G>,

Constructs a SymbolBitSet.

pub fn terminal_set<'a, G>(grammar: &'a G) -> Selfwhere G: RuleContainer + Default, &'a G: RuleContainerRef<'a, Target = G>,

Gathers information about whether symbols are terminal or nonterminal. Constructs a set of terminal symbols.

Constructs a data structure in O(n) time.

pub fn terminal_or_nulling_set<'a, G>(grammar: &'a G) -> Selfwhere G: RuleContainer + Default, &'a G: RuleContainerRef<'a, Target = G>,

Gathers information about whether symbols are terminal or nonterminal. Constructs a set of terminal symbols.

Constructs a data structure in O(n) time.

pub fn set(&mut self, sym: Symbol, value: bool)

Set the entry for a symbol.

pub fn has_sym(&self, sym: Symbol) -> bool

Checks whether a given symbol is in this set.

pub fn into_bit_vec(self) -> BitVec

Converts into a bit vector.

pub fn iter(&self) -> Iter<'_>

Iterates over symbols in the set.