return sb.String()
}

// Destructor is a destructor.
type Destructor struct {
	Name AST
}

func (d *Destructor) print(ps *printState) {
	ps.writeByte('~')
	ps.print(d.Name)
}

func (d *Destructor) Traverse(fn func(AST) bool) {
	if fn(d) {
		d.Name.Traverse(fn)
	}
}

func (d *Destructor) Copy(fn func(AST) AST, skip func(AST) bool) AST {
	if skip(d) {

// to register a thread-exit-time destructor.
// We are here setting the thread-specific value of the pthread key, to enable the destructor.
// So that the pthread_key_destructor would dropm while the C thread is exiting.
//
// And the saved g will be used in pthread_key_destructor,
// since the g stored in the TLS by Go might be cleared in some platforms,
// before the destructor invoked, so, we restore g by the stored g, before dropm.

  tensorflow::Status error_status;
  {
    // Start a threadpool to convert signatures, since signature conversion can
    // be time consuming especially for large models. Threadpool destructor
    // blocks until all work is done.
    thread::ThreadPool thread_pool(Env::Default(), "ConvertSignatures",
                                   kNumThreadToConvertSignatures);