/**
 * Runtime string utility functions that mirror the TypeScript utility types
 */
import type { CamelCaseIdentifier, PrettyCamelCase, ValidIdentifier } from './types/camelCase.types';
/**
 * Remove leading separators from a string
 */
export declare function removeLeadingSeparators(str: string): string;
/**
 * Split a string by separators (space, dash, underscore, dot, slash, colon)
 */
export declare function splitBySeparators(str: string): string[];
/**
 * Remove all non-alphanumeric characters from a string
 */
export declare function removeNonAlphanumeric(str: string): string;
/**
 * Remove leading numbers from a string to make it a valid identifier
 */
export declare function removeLeadingNumbers(str: string): string;
/**
 * Capitalize the first letter of a string
 */
export declare function capitalize(str: string): string;
/**
 * Convert the first letter to lowercase
 */
export declare function uncapitalize(str: string): string;
/**
 * Convert a string to a valid TypeScript identifier in camelCase
 * Always returns a string, defaulting to the input if transformation fails
 *
 * @param str - The input string to transform
 * @returns The camelCase identifier or the original string if transformation fails
 *
 * @example
 * ```typescript
 * toCamelCaseIdentifier("hello-world"); // "helloWorld"
 * toCamelCaseIdentifier("my_var_name"); // "myVarName"
 * toCamelCaseIdentifier("some.property.name"); // "somePropertyName"
 * toCamelCaseIdentifier("123invalid"); // "invalid"
 * toCamelCaseIdentifier("hello world"); // "helloWorld"
 * toCamelCaseIdentifier("API-Key"); // "aPIKey"
 * toCamelCaseIdentifier("/organization/base"); // "organizationBase"
 * ```
 */
export declare function toCamelCaseIdentifier<T extends string>(str: T): CamelCaseIdentifier<T>;
/**
 * Pretty camelCase conversion that handles abbreviations more intuitively
 * Always returns a string, defaulting to the input if transformation fails
 *
 * @param str - The input string to transform
 * @returns The pretty camelCase identifier or the original string if transformation fails
 *
 * @example
 * ```typescript
 * toPrettyCamelCase("API-Key"); // "apiKey"
 * toPrettyCamelCase("HTTP-Response"); // "httpResponse"
 * toPrettyCamelCase("user-ID"); // "userId"
 * toPrettyCamelCase("get-user-by-id"); // "getUserById"
 * toPrettyCamelCase("/organization/base"); // "organizationBase"
 * ```
 */
export declare function toPrettyCamelCase<T extends string>(str: T): PrettyCamelCase<T>;
/**
 * Alternative implementation using a more comprehensive approach
 * for complex cases with better handling of edge cases
 */
export declare function toValidIdentifier<T extends string>(str: T): ValidIdentifier<T>;
/**
 * Check if a string is a valid JavaScript/TypeScript identifier
 */
export declare function isValidIdentifier(str: string): boolean;
/**
 * Get detailed information about the transformation process
 * Useful for debugging and understanding how the transformation works
 */
export declare function getTransformationInfo(str: string): {
    original: string;
    withoutLeadingSeparators: string;
    parts: string[];
    camelCase: string;
    prettyCamelCase: string;
    withoutLeadingNumbers: string;
    prettyCamelCaseWithoutLeadingNumbers: string;
    isValid: boolean;
};
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