import { CssTreeParsingContext, type CssTreeParsingContextToNode } from './css-tree-types';
/**
 * Possible values for the cache map.
 */
export type CssCacheValue<K extends CssTreeParsingContext> = CssTreeParsingContextToNode[K] | Error;
/**
 * Cache maps for CSS tree nodes. Key is the CSS tree parsing context and value is a map of CSS to node or error
 * (if parsing failed before).
 */
export type CssCacheMaps = {
    [K in CssTreeParsingContext]: Map<string, CssCacheValue<K>>;
};
/**
 * Cache for CSS tree nodes. We share the cache between all rules to avoid parsing the same CSS multiple times.
 * For errors, we cache the relative error position, so the error position can be calculated for any AGTree node.
 */
export declare class CssCache {
    /**
     * Internal cache maps.
     */
    private maps;
    /**
     * Creates a new cache instance for CSS tree nodes.
     */
    constructor();
    /**
     * Gets entry from the cache.
     *
     * @param context The parsing context.
     * @param css The CSS string.
     *
     * @returns The CSS tree node / error or undefined if CSS string is not cached.
     */
    get<K extends CssTreeParsingContext>(context: K, css: string): CssCacheValue<K> | undefined;
    /**
     * Adds entry to the cache.
     *
     * @param context The parsing context.
     * @param css The CSS string.
     * @param node The CSS tree node / error.
     */
    set<K extends CssTreeParsingContext>(context: K, css: string, node: CssCacheValue<K>): void;
}