type PropertyOptions = {
    patterns?: Record<string, RegExp | string>;
} & ({
    allowList: string[];
    denyList?: undefined;
    required?: undefined;
} | {
    allowList?: undefined;
    denyList?: string[];
    required?: string[];
});

type GenerateOptions = PropertyOptions & {
    /**
     * Prefix for generated code. [default: `/* Auto generated by typedotenv *‍/`]
     */
    prefix?: string;
    /**
     * Object that provide environment variables [default: `process.env`]
     * @example `import.meta.env`
     */
    envObject?: string;
    /**
     * Disable type assertions like `as string`
     * @example
     * enableTypeAssertion: true
     * ```js
     * export const VAR = process.env.VAR as string;
     * ```
     * enableTypeAssertion: false
     * ```ts
     * export const VAR = process.env.VAR;
     * ```
     */
    enableTypeAssertion?: boolean;
    /**
     * End of line cheracter [default: `\n`]
     */
    eol?: string;
    /**
     * Disable runtime validation
     * @example
     * disableRuntimeTypeCheck: true
     * ```ts
     * export const VAR = process.env.VAR as string;
     * ```
     * disableRuntimeTypeCheck: false
     * ```ts
     * export const VAR = process.env.VAR as string;
     * if (typeof VAR !== 'string') throw new Error('VAR is not defined in .env');
     * ```
     */
    disableRuntimeTypeCheck?: boolean;
    /**
     * Access environment variables from index (obj["key"]) signature or dot (obj.key) signature
     * @example
     * accessFromIndexSignature: true
     * ```js
     * export const VAR = process.env["VAR"];
     * ```
     * accessFromIndexSignature: false
     * ```ts
     * export const VAR = process.env.VAR;
     * ```
     */
    accessFromIndexSignature?: boolean;
};
/**
 * Generate TypeScript from dotenv contents
 * @param dotenv dotenv contents
 * @param options generate options include validation options
 * @returns generated TypeScript code
 */
declare const generate: (dotenv: string, options?: GenerateOptions) => string;

export { GenerateOptions, generate };