Function parseObjcRNExports

src/resolution/frameworks/react-native.ts:99–143

* Parse an ObjC `.m`/`.mm` file's source for `RCT_EXPORT_MODULE` and * `RCT_EXPORT_METHOD` / `RCT_REMAP_METHOD` declarations, returning the * inferred (moduleName, jsMethodName) pairs. * * The macro forms (a single `RCT_EXPORT_MODULE` per file conventionally * matched to a single `@implementati

(
  source: string,
  className: string | null
)

 * macro-aware ObjC parse the tree-sitter grammar doesn't provide.
 */
function parseObjcRNExports(
  source: string,
  className: string | null
): Array<{ moduleName: string; jsName: string; nativeSelectorFirstKw: string; line: number }> {
  const results: Array<{ moduleName: string; jsName: string; nativeSelectorFirstKw: string; line: number }> = [];

  // RCT_EXPORT_MODULE — one per file by convention. Capture the optional arg.
  const moduleMatch = source.match(/RCT_EXPORT_MODULE\s*\(\s*([A-Za-z_][A-Za-z0-9_]*)?\s*\)/);
  // Need a module name to attribute methods. Prefer the explicit macro arg,
  // then the class name, then bail (no module = nothing useful to register).
  const moduleName =
    moduleMatch?.[1] ??
    (className ? defaultObjcModuleName(className) : null);
  if (!moduleName) return results;

  const lineOf = (idx: number): number => {
    let line = 1;
    for (let i = 0; i < idx && i < source.length; i++) if (source.charCodeAt(i) === 10) line++;
    return line;
  };

  // RCT_EXPORT_METHOD(selectorFirstKw:(args)…)
  // The first keyword (everything up to the first `:` or open paren) is the
  // JS-visible name. We don't try to parse full multi-keyword selectors —
  // RN's JS view of the method uses only the first keyword.
  const exportRegex = /RCT_EXPORT_METHOD\s*\(\s*([A-Za-z_][A-Za-z0-9_]*)/g;
  let m: RegExpExecArray | null;
  while ((m = exportRegex.exec(source)) !== null) {
    const kw = m[1];
    if (kw) results.push({ moduleName, jsName: kw, nativeSelectorFirstKw: kw, line: lineOf(m.index) });
  }

  // RCT_REMAP_METHOD(jsName, nativeSelectorFirstKw:(args)…)
  const remapRegex =
    /RCT_REMAP_METHOD\s*\(\s*([A-Za-z_][A-Za-z0-9_]*)\s*,\s*([A-Za-z_][A-Za-z0-9_]*)/g;
  while ((m = remapRegex.exec(source)) !== null) {
    const jsName = m[1];
    const nativeKw = m[2];
    if (jsName && nativeKw) {
      results.push({ moduleName, jsName, nativeSelectorFirstKw: nativeKw, line: lineOf(m.index) });
    }
  }

  return results;
}

/**
 * Find the `@implementation` class name in an ObjC file — used as the