import type { ContextFreeGrammar, NonTerminalSymbol, TerminalSymbol } from './typings';
export declare class Parser {
    #private;
    constructor(grammar: ContextFreeGrammar);
    get grammar(): ContextFreeGrammar;
    get nonTerminals(): Set<string>;
    get terminals(): Set<string | null>;
    /**
     * Finds the `FIRST` set of a given grammar symbol.
     * @param symbol The grammar symbol whose `FIRST` set is to be calculated
     */
    first(symbol: TerminalSymbol | NonTerminalSymbol): Set<TerminalSymbol | null>;
    follow(symbol: TerminalSymbol | NonTerminalSymbol): void;
}
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