Method visitNode

src/extraction/tree-sitter.ts:936–1303

* Visit a node and extract information

(node: SyntaxNode)

   * Visit a node and extract information
   */
  private visitNode(node: SyntaxNode): void {
    if (!this.extractor) return;

    const nodeType = node.type;
    let skipChildren = false;

    // Language-specific custom visitor hook
    if (this.extractor.visitNode) {
      const ctx = this.makeExtractorContext();
      const handled = this.extractor.visitNode(node, ctx);
      if (handled) {
        // The hook consumed this subtree, so the walkers below never descend
        // into it — scan it for function-as-value candidates (#756). Scala's
        // hook handles val/var definitions (`val table = Seq(targetCb)`), for
        // example. The scan is capture-only and halts at nested functions.
        this.scanFnRefSubtree(node, 0);
        return;
      }
    }

    // Pascal-specific AST handling
    if (this.language === 'pascal') {
      skipChildren = this.visitPascalNode(node);
      if (skipChildren) return;
    }

    // C++ namespace blocks: carry the namespace name as a qualifiedName prefix
    // while walking the body, so `namespace flash { void compute_attn(); }`
    // indexes compute_attn with qualifiedName `flash::compute_attn` and a
    // namespace-qualified call (`flash::compute_attn(...)`) resolves by exact
    // qualified match instead of never resolving — C++ namespaces previously
    // left no trace in qualifiedNames at all, so every `ns::fn()` call site
    // was a permanently dead edge (surfaced by #387 flow validation on
    // flash-attention/cutlass, whose kernel dispatch is namespace-qualified).
    // C++17 nested forms (`namespace a::b {`) prefix as written. An anonymous
    // namespace falls through to the generic walk — its contents stay bare,
    // matching how call sites spell them.
    if (this.language === 'cpp' && nodeType === 'namespace_definition') {
      const nameNode = getChildByField(node, 'name');
      const nsName = nameNode ? getNodeText(nameNode, this.source) : '';
      if (nsName) {
        this.namespacePrefix.push(nsName);
        for (let i = 0; i < node.namedChildCount; i++) {
          const child = node.namedChild(i);
          if (child) this.visitNode(child);
        }
        this.namespacePrefix.pop();
        return;
      }
    }

    // Function-as-value capture (#756) — independent of the dispatch ladder
    // below (the captured container types have no other handler there), so it
    // can never shadow or be shadowed by an extraction branch.
    this.maybeCaptureFnRefs(node, nodeType);

    // Check for function declarations
    // For Python/Ruby, function_definition inside a class should be treated as method