Struct nff::NonTerminals

pub struct NonTerminals { /* private fields */ }

Put all nonterminals in a single struct, one hashmap for rules and one each for nullable, first, and follow.

Implementations

impl NonTerminals

pub fn init(grammar: String) -> Self

Init takes the grammar in the form of a string and initializes all the hashmaps.

pub fn calculate_null_set(&mut self)

Determines which nonterminals are nullable

pub fn calculate_first_set(&mut self)

Determines the first set of each nonterminal

pub fn calculate_follow_set(&mut self)

Determines the follow set of each nonterminal

pub fn print_rules(&self)

You can use this function to verify that nff understood your rules correctly

pub fn print_results(&self)

Print results