import { ExtCssDocument } from '../selector';
import { ExtCssRuleData } from '../css-rule';
/**
 * Parses stylesheet of rules into rules data objects (non-recursively):
 * 1. Iterates through stylesheet string.
 * 2. Finds first `{` which can be style declaration start or part of selector.
 * 3. Validates found string part via selector parser; and if:
 *  - it throws error — saves string part to buffer as part of selector,
 *    slice next stylesheet part to `{` [2] and validates again [3];
 *  - no error — saves found string part as selector and starts to parse styles (recursively).
 *
 * @param rawStylesheet Raw stylesheet as string.
 * @param extCssDoc ExtCssDocument which uses cache while selectors parsing.
 * @throws An error on unsupported CSS features, e.g. comments or invalid stylesheet syntax.
 * @returns Array of rules data which contains:
 * - selector as string;
 * - ast to query elements by;
 * - map of styles to apply.
 */
export declare const parseStylesheet: (rawStylesheet: string, extCssDoc: ExtCssDocument) => ExtCssRuleData[];