import { StringCase } from '../types/stringCaseTypes';
/**
 * Detects the case format of a string
 * @param str - The string to analyze
 * @returns The detected case format, 'single' for single words, or null if format cannot be determined
 *
 * @example
 * ```typescript
 * detectStringCase('hello_world') // => 'snake'
 * detectStringCase('helloWorld') // => 'camel'
 * detectStringCase('HelloWorld') // => 'pascal'
 * detectStringCase('hello-world') // => 'kebab'
 * detectStringCase('hello') // => 'single'
 * ```
 * @internal This function is for internal use by the library
 */
export default function detectStringCase(str: string): StringCase | 'single' | null;