import { InterpolatorConfig } from '@react-spring/types';
/**
 * Supports string shapes by extracting numbers so new values can be computed,
 * and recombines those values into new strings of the same shape.  Supports
 * things like:
 *
 *     "rgba(123, 42, 99, 0.36)"           // colors
 *     "-45deg"                            // values with units
 *     "0 2px 2px 0px rgba(0, 0, 0, 0.12)" // CSS box-shadows
 *     "rotate(0deg) translate(2px, 3px)"  // CSS transforms
 */
export declare const createStringInterpolator: (config: InterpolatorConfig<string>) => (input: number) => string;