Function scalaBaseTypeName

src/extraction/tree-sitter.ts:176–199

* Resolve a Scala type node to its base type NAME for name-matching — unwrapping * `generic_type` (`Monoid[Int]` → `Monoid`), taking the last segment of a * qualified `stable_type_identifier` (`cats.Functor` → `Functor`), and falling * back to a descendant `type_identifier`. Returns null for non-

(node: SyntaxNode | null, source: string)

 * Shared by Scala inheritance and type-reference extraction.
 */
function scalaBaseTypeName(node: SyntaxNode | null, source: string): string | null {
  if (!node) return null;
  switch (node.type) {
    case 'type_identifier':
    case 'identifier':
      return getNodeText(node, source);
    case 'generic_type':
      // `<base> type_arguments` — the base type is the first named child.
      return scalaBaseTypeName(node.namedChild(0), source);
    case 'stable_type_identifier':
    case 'stable_identifier': {
      // Qualified `a.b.C` — match on the simple (last) segment.
      const ids = node.namedChildren.filter(
        (c: SyntaxNode) => c.type === 'type_identifier' || c.type === 'identifier'
      );
      const last = ids[ids.length - 1];
      return last ? getNodeText(last, source) : null;
    }
    default: {
      const id = node.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
      return id ? getNodeText(id, source) : null;
    }
  }
}

/**
 * Resolve the declared identifier inside a C declarator. A `declaration`'s