/**
 * Split a variable reference into parts. This forms a path that
 * will be used to resolve against a context. Digit components of
 * the path are converted to numbers.
 */
export declare const splitVariable: (name: string) => (string | number)[];
/**
 * Return true if the string starts with a value JSON character or value.
 */
export declare const isJsonStart: (s: string | number) => boolean;
/**
 * Deep compare of two objects for equality.
 *
 * Note: this is not general-purpose. It is intended to deeply-compare
 * valid JSON types. For example it cannot determine equality of Date objects.
 */
export declare const deepEquals: (o1: any, o2: any) => boolean;
/**
 * Returns an integer indicating:
 *
 *  -N   left < right
 *   0   left == right
 *  +N   left > right
 */
export declare const stringCompare: (s1: string, s2: string) => number;
/**
 * Repeat a string N times.
 */
export declare const repeat: (n: number, str: string) => string;
/**
 * Merge object deeply nested properties.
 */
export declare const deepMerge: (dst: any, ...sources: any[]) => any;
/**
 * Create a deep copy of value, object or array.
 */
export declare const deepCopy: (obj: any) => any;
/**
 * For each character in the mapping, replace it in the output.
 */
export declare const replaceMappedChars: (str: string, mapping: {
    [c: string]: string;
}) => string;