}
		if t.NumFields() != 1 {
			return nil
		}
		return t.Field(0).Type.SoleComponent()
	case TARRAY:
		if t.NumElem() != 1 {
			return nil
		}
		return t.Elem().SoleComponent()
	}
	return t
}

// ChanDir returns the direction of a channel type t.
// The direction will be one of Crecv, Csend, or Cboth.
func (t *Type) ChanDir() ChanDir {