import type { Alphabet } from "../common";
/** Parameters of `MappedAlphabet` */
export interface MappedAlphabetParams {
    /**
     * Alphabet that serves as the base alphabet
     */
    base: Alphabet;
    /**
     * An object that maps characters to replacement characters
     */
    mapping: Record<string, string>;
}
/**
 * An alphabet that maps specified characters in a base alphabet to replacement characters
 */
export declare abstract class MappedAlphabetBase implements Alphabet {
    protected readonly _base: Alphabet;
    protected readonly _mapping: Record<string, string>;
    protected readonly _reverseMapping: Record<string, string>;
    constructor({ base, mapping, }: MappedAlphabetParams);
    get length(): number;
    abstract has(char: string): boolean;
    abstract getAt(index: number): string;
    abstract indexOf(char: string): number;
    abstract [Symbol.iterator](): Iterator<string>;
}