Struct cfg::symbol::set::SymbolBitSet

pub struct SymbolBitSet { /* fields omitted */ }

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

Methods

impl SymbolBitSet

pub fn new<'a, G>(grammar: &'a G, elem: bool) -> Self where
    G: ContextFree,
    &'a G: ContextFreeRef<'a, Target = G>, 

Constructs a SymbolBitSet.

pub fn terminal_set<'a, G>(grammar: &'a G) -> Self where
    G: ContextFree,
    &'a G: ContextFreeRef<'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) -> Self where
    G: ContextFree,
    &'a G: ContextFreeRef<'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.

Important traits for Iter<'a>

impl<'a> Iterator for Iter<'a> type Item = Symbol;

pub fn iter(&self) -> Iter

Iterates over symbols in the set.