/** Literal default values we can carry into the spec's `default`. */
export type DefaultValue = string | number | boolean | null;
/**
 * Source-level default prop values for a React component. TypeScript TYPES don't carry
 * defaults — they live in the implementation (destructuring defaults or `defaultProps`),
 * which `analyzeExport` (type-based) and `react-docgen`'s default handler (param-only)
 * miss. This does a lightweight, SYNTACTIC AST walk (no type-check, no program) of the
 * source file to recover them for the three real-world shapes:
 *
 *   1. param destructuring     `(props: P) => ({ size = 'md' }) ...`  ← also `function`
 *   2. body destructuring      `(props: P) => { const { size = 'md' } = props; ... }`
 *   3. static defaultProps      `Comp.defaultProps = { size: 'md' }`
 *
 * Only string / number / boolean / null literal defaults are returned (a default of a
 * function, identifier, or object isn't a meaningful form value, so it's skipped).
 * Best-effort: any failure yields `{}` rather than throwing — defaults are an
 * enhancement, never a reason to fail inference.
 */
export declare function extractDefaultProps({ fileName, exportName, resolveFromDir, pkgPathAliases, }: {
    fileName: string;
    exportName?: string;
    resolveFromDir: string;
    pkgPathAliases?: Record<string, string>;
}): Promise<Record<string, DefaultValue>>;
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