/**
 * Check quotes and apostrophes.
 *
 * ###### Notes
 *
 * This plugin knows about apostrophes as well and prefers `'` when
 * `preferred: 'straight'`, and `’` otherwise.
 *
 * The values in `straight` and `smart` can be one or two characters.
 * When two, the first character determines the opening quote and the second
 * the closing quote at that level.
 * When one, both the opening and closing quote are that character.
 *
 * The order in which the preferred quotes appear in their respective list
 * determines which quotes to use at which level of nesting.
 * So, to prefer `‘’` at the first level of nesting, and `“”` at the second,
 * pass: `smart: ['‘’', '“”']`.
 *
 * If quotes are nested deeper than the given amount of quotes, the markers
 * wrap around: a third level of nesting when using `smart: ['«»', '‹›']`
 * should have double guillemets, a fourth single, a fifth double again, etc.
 *
 * @param {Readonly<Options> | null | undefined} [options]
 *   Configuration (optional).
 * @returns
 *   Transform.
 */
export default function retextQuotes(options?: Readonly<Options> | null | undefined): (tree: Root, file: VFile) => undefined;
/**
 * Marker.
 */
export type Marker = {
    /**
     *   Whether the marker is `straight` or `smart`.
     */
    style: Style;
    /**
     *   The actual marker.
     */
    marker: string;
    /**
     *   What the marker seems to be for.
     */
    type: "apostrophe" | "close" | "open" | undefined;
};
/**
 * Configuration.
 */
export type Options = {
    /**
     * Style of quotes to use (default: `'smart'`).
     */
    preferred?: Style | null | undefined;
    /**
     * List of quotes to see as “smart” (default: `['“”', '‘’']`).
     */
    smart?: ReadonlyArray<string> | null | undefined;
    /**
     * List of quotes to see as “straight” (default: `['"', "'"]`).
     */
    straight?: ReadonlyArray<string> | null | undefined;
};
/**
 * Style.
 */
export type Style = "smart" | "straight";
import type { Root } from 'nlcst';
import type { VFile } from 'vfile';
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