import type { CaseFormat, StringCaseOptions } from './types';
/**
 * * Converts a string to a specified case format with advanced handling for word boundaries, punctuation, acronyms, and Unicode characters.
 *
 * @remarks
 * - This function is Unicode-aware, treats non-alphanumeric characters (spaces, underscores, dots, slashes, etc.) as word boundaries, and optionally preserves internal acronyms.
 * - `Title Case` formatting respects small words such as prepositions, articles, conjunctions, and auxiliary verbs (defined in `LOWERCASE`) — these are not capitalized unless they appear at the start or end of the string.
 * - Leading and trailing punctuation (non-letter/number characters) is preserved in the result.
 *
 * @param value - The input string to convert. Can contain letters, numbers, punctuation,
 *   spaces, underscores, dashes, etc.
 * @param format - The target case format:
 *   - `'camelCase'` → camelCase (e.g., `myVariableName`)
 *   - `'PascalCase'` → PascalCase (e.g., `MyVariableName`)
 *   - `'snake_case'` → snake_case (e.g., `my_variable_name`)
 *   - `'kebab-case'` → kebab-case (e.g., `my-variable-name`)
 *   - `'Title Case'` → Title Case (e.g., `My Variable Name`)
 *   - `'lowercase'` → all lowercase [ It is recommended to use built-in string method `string.toLowerCase()` ]
 *   - `'UPPERCASE'` → all uppercase [ It is recommended to use built-in string method `string.toUpperCase()` ]
 * @param options - Optional configuration options for more control.
 *
 * @returns The converted string, with leading/trailing punctuation preserved.
 *
 * @example
 * // Basic usage
 * convertStringCase('my-example_string', 'camelCase');
 * // Returns: 'myExampleString'
 *
 * convertStringCase('my-example_string', 'snake_case');
 * // Returns: 'my_example_string'
 *
 * convertStringCase('my-example_string', 'kebab-case');
 * // Returns: 'my-example-string'
 *
 * convertStringCase('my example string', 'Title Case');
 * // Returns: 'My Example String'
 *
 * convertStringCase('My example String', 'lowercase');
 * // Returns: 'my example string'
 *
 * convertStringCase('my example string', 'UPPERCASE');
 * // Returns: 'MY EXAMPLE STRING'
 *
 * @example
 * // Preserve acronyms
 * convertStringCase('get API response', 'camelCase', { preserveAcronyms: true });
 * // Returns: 'getAPIResponse'
 *
 * convertStringCase('get API response', 'PascalCase', { preserveAcronyms: true });
 * // Returns: 'GetAPIResponse'
 *
 * convertStringCase('the API of things', 'Title Case', { preserveAcronyms: true });
 * // Returns: 'The API of Things'
 *
 * @example
 * // Leading/trailing punctuation is preserved
 * convertStringCase('++hello_world++', 'PascalCase');
 * // Returns: '++HelloWorld++'
 *
 * @example
 * // Dashes are preserved in Title Case
 * convertStringCase('xml-http_request', 'Title Case');
 * // Returns: 'Xml-http Request'
 *
 * @example
 * // Empty string returns empty
 * convertStringCase('', 'camelCase');
 * // Returns: ''
 *
 * @example
 * // Single token is capitalized properly
 * convertStringCase('api', 'PascalCase');
 * // Returns: 'Api'
 */
export declare function convertStringCase(value: string, format: CaseFormat, options?: StringCaseOptions): string;
//# sourceMappingURL=case.d.ts.map