Function walkNode

packages/js-runtime/src/ast-walker.ts:6–40

(
  node: unknown,
  visitor: (
    node: Record<string, unknown>,
    parent?: Record<string, unknown>,
  ) => void,
  parent?: Record<string, unknown>,
)

 * Simple recursive AST walker that doesn't require @babel/traverse
 */
export function walkNode(
  node: unknown,
  visitor: (
    node: Record<string, unknown>,
    parent?: Record<string, unknown>,
  ) => void,
  parent?: Record<string, unknown>,
): void {
  if (!node || typeof node !== 'object') {
    return;
  }

  // Handle arrays
  if (Array.isArray(node)) {
    for (const child of node) {
      walkNode(child, visitor, parent);
    }
    return;
  }

  const nodeObj = node as Record<string, unknown>;

  // Only visit AST nodes (they have a 'type' property)
  if (typeof nodeObj.type === 'string') {
    visitor(nodeObj, parent);
  }

  // Recursively walk all properties
  for (const key of Object.keys(nodeObj)) {
    const value = nodeObj[key];
    if (value && typeof value === 'object') {
      walkNode(value, visitor, nodeObj);
    }
  }
}

/**
 * Track declared variables/parameters to know what identifiers are "local"