import { RandomStringBuilderCallback } from './contracts';
import { Str } from './str';
export interface StrContract {
    /**
     * Creates a new  providing chainable string operations. This new
     * instance clones the original string and works with the clone.
     * It won’t modify the original string value.
     *
     * @param value - `value` is the value being wrapped into an `Str` instance
     */
    (value?: any): Str;
    /**
     * Create a UUID (version 4).
     */
    uuid(): string;
    /**
     * Create a random, URL-friendly string. The default length will have 21 symbols.
     *
     * @param size - `[size=21]` defines the number of symbols in the random string
     */
    random(size?: number | RandomStringBuilderCallback): string;
    /**
     * Determine whether the given `input` is a string.
     *
     * @param input - the `input` value to check whether it’s a string
     */
    isString(input?: any): input is string;
    /**
     * Determine whether the given `input` is an alpha-numeric string.
     *
     * @param input
     */
    isAlphaNumeric(input?: any): boolean;
    /**
     * Determine whether the given `input` is a symbol.
     *
     * @param input - the `input` value to check whether it’s a symbol
     */
    isSymbol(input?: any): input is symbol;
}