import type { AffixForm } from "../lookup/forms.js";
import type { Flag } from "./index.js";
/**
 * A pattern for checking if a pair of {@link AffixForm}s are a valid
 * compounding arrangement. Uses the following syntax:
 *
 * ```text
 * endchars[/flag] beginchars[/flag] [replacement]
 * ```
 *
 * Basically, a pair of forms has to have its first word end with
 * `endchars`, and its second word to begin with `beginchars`. The flags
 * given follow a similar logic.
 *
 * `replacement` is a strange optional string, meaning "if `replacement`
 * can be found at the word boundary of the pair of forms, make that
 * compound allowed regardless if this pattern otherwise matches". No
 * dictionary uses this feature and it isn't implemented in either Spylls
 * or Espells.
 */
export declare class CompoundPattern {
    /** The pattern's left-side rules. */
    left: {
        stem: string;
        flag: Flag;
        noAffix: boolean;
    };
    /** The pattern's right-side rules. */
    right: {
        stem: string;
        flag: Flag;
        noAffix: boolean;
    };
    /**
     * @param left - The `endchars[/flag]` syntax.
     * @param right - The `beginchars[/flag]` syntax.
     * @param _replacement - An unused optional syntax. See the documentation
     *   for the class itself for more info. Unused in both Spylls and Espells.
     */
    constructor(left: string, right: string, _replacement?: string);
    /**
     * Determines if a pair of {@link AffixForm}s isn't an allowed compound
     * pair, as in this returns `true` if the pair is invalid.
     *
     * @param left - The left-side {@link AffixForm}.
     * @param right - The right-side {@link AffixForm}.
     */
    match(left: AffixForm, right: AffixForm): boolean;
}