docs: def p_static_scalar_namespace_name(p):
      '''static_scalar : namespace_name
                       | NS_SEPARATOR namespace_name
                       | NAMESPACE NS_SEPARATOR namespace_name'''
      if len(p) == 2:
          p[0] = ast.Constant(p[1], lineno=p.lineno(1))
      elif len(p) == 3:
          p[0] = ast.Constant(p[1] + p[2], lineno=p.lineno(1))
      else:
          p[0] = ast.Constant(p[1] + p[2] + p[3], lineno=p.lineno(1))