import type { VowelForm } from "../../parse/vowel-form.js";
export type Text = string | WithWYAlternative;
export type Joinable = Text | VowelForm | null | undefined;
/**
 * Represents strings that have alternatives when preceded by W or Y, such as
 * most of the vowel forms in column 3 of the standard vowel table.
 */
export declare class WithWYAlternative {
    readonly defaultValue: string;
    readonly valueAfterW: string;
    readonly valueAfterY: string;
    /**
     * Adds two strings or `WithWYAlternative`s.
     *
     * @param first The left side of the output.
     * @param second The right side of the output.
     * @returns A string containing the output.
     */
    static add(first: string, second: Text): string;
    /**
     * Adds two strings or `WithWYAlternative`s.
     *
     * @param first The left side of the output.
     * @param second The right side of the output.
     * @returns A `WithWYAlternative` containing the output.
     */
    static add(first: WithWYAlternative, second: Text): WithWYAlternative;
    /**
     * Adds two strings or `WithWYAlternative`s.
     *
     * @param first The left side of the output.
     * @param second The right side of the output.
     * @returns A string or `WithWYAlternative` representing the output.
     */
    static add(first: Text, second: Text): Text;
    /**
     * Coerces a string or `WithWYAlternative` as a `WithWYAlternative`.
     *
     * @param text The string or `WithWYAlternative` to create an object from.
     * @returns A `WithWYAlternative` containing the input data.
     */
    static of(text: Text): WithWYAlternative;
    /**
     * Constructs a `WithWYAlternative`.
     *
     * @param defaultValue The default value.
     * @param valueAfterW The value when preceded by W.
     * @param valueAfterY The value when preceded by Y.
     * @returns The constructed, frozen `WithWYAlternative`.
     */
    constructor(defaultValue: string, valueAfterW: string, valueAfterY: string);
    /**
     * Gets the appropriate field (defaultValue, precededByW, or precededByY)
     * based on the contents of text preceding this `WithWYAlternative`.
     *
     * @param text The text preceding this `WithWYAlternative`.
     * @returns The value of the appropriate field.
     */
    withPreviousText(text: string): string;
    /**
     * Adds this `WithWYAlternative` to a string or another `WithWYAlternative`.
     *
     * @param other A string or `WithWYAlternative` to add this to.
     * @returns A `WithWYAlternative` containing the appropriate outputs.
     */
    add(other: Text): WithWYAlternative;
    /**
     * Stringifies this WithWYAlternative.
     *
     * @returns A stringified representation of this WithWYAlternative.
     */
    toString(): string;
    /**
     * Inserts glottal stops into this `WithWYAlternative`.
     *
     * @param isAtEndOfWord Whether this `WithWYAlternative` is at the end of a
     *   word.
     * @returns A `WithWYAlternative` containing the contents of this one, but
     *   with a glottal stop in each alternative.
     */
    insertGlottalStop(isAtEndOfWord: boolean): WithWYAlternative;
}
/** A `WithWYAlternative` instance containing the empty string. */
export declare const EMPTY: WithWYAlternative;
/** A `WithWyAlternative` instance containing `ia/uä`. */
export declare const IA_UÄ: WithWYAlternative;
/** A `WithWyAlternative` instance containing `ie/uë`. */
export declare const IE_UË: WithWYAlternative;
/** A `WithWyAlternative` instance containing `io/üä`. */
export declare const IO_ÜÄ: WithWYAlternative;
/** A `WithWyAlternative` instance containing `iö/üë`. */
export declare const IÖ_ÜË: WithWYAlternative;
/** A `WithWyAlternative` instance containing `uö/öë`. */
export declare const UÖ_ÖË: WithWYAlternative;
/** A `WithWyAlternative` instance containing `uo/öä`. */
export declare const UO_ÖÄ: WithWYAlternative;
/** A `WithWyAlternative` instance containing `ue/ië`. */
export declare const UE_IË: WithWYAlternative;
/** A `WithWyAlternative` instance containing `ua/iä`. */
export declare const UA_IÄ: WithWYAlternative;
/**
 * Joins several strings and vowel forms into a `WithWYAlternative`. Passing the
 * proper `isAtEndOfWord` value to `VowelForm`s is taken care of automatically.
 *
 * This is intended to be used to create a full word, as it will not preserve
 * forms which can alternate if they are at the beginning of the word.
 *
 * @param texts The strings and `WithWYAlternative`s to create an object from.
 * @returns A `WithWYAlternative` containing all input data, joined properly.
 */
export declare function join(...texts: (Joinable | Joinable[])[]): string;