code: def p_const_vector_elem_list(p):
      
      if p[1] is None:
          return
  
      if not is_static(p[1]):
          if isinstance(p[1], symbols.UNARY):
              tmp = make_constexpr(p.lineno(1), p[1])
          else:
              api.errmsg.syntax_error_not_constant(p.lexer.lineno)
              p[0] = None
              return
      else:
          tmp = p[1]
  
      p[0] = [tmp]
docs: const_number_list : expr