Function looksLikeObjc

src/extraction/grammars.ts:520–523

* Heuristic: does a .h file contain Objective-C constructs?

(source: string)

 * Heuristic: does a .h file contain Objective-C constructs?
 */
function looksLikeObjc(source: string): boolean {
  const sample = source.substring(0, 8192);
  return /@(?:interface|implementation|protocol|synthesize)\b/.test(sample);
}

/**
 * Check if a language is supported (has a grammar defined).