在 Solaris 11 DeveloperStudio12.6 中使用重载 = 运算符进行转换失败

问题描述

一段代码在 Solaris 10 中编译良好，但在 Solaris 11 DeveloperStudio 12.6 中编译失败。

import unittest
from selenium import webdriver
from selenium.webdriver.common.keys import Keys

driver = webdriver.Firefox("C:\Program Files (x86)\chromedriver.exe")
driver.maximize_window()

如果我把代码改成（虽然很蠢）：

Error: Cannot cast from DOM_Node to const DOM_XMLDecl&.

Code : xml->root_node = (const DOM_XMLDecl&)(xml->doc.getFirstChild());

来自图书馆：

xml->root_node = (xml->doc.getFirstChild());

Error: Cannot assign DOM_Node to DOM_XMLDecl without "DOM_XMLDecl::operator=(const DOM_XMLDecl&)";.

此代码在 Solaris 10 sunstudio 中编译良好，但在 x86、Studio 12.6 Sun C++ 5.15 SunOS_i386 上的 Solaris 中编译失败

Oracle 在其 documentation 中说通过使用 -W0 选项取消 CONST 正确性，对我不起作用

我的编译标志是：

DOM_XMLDecl & operator = (const DOM_XMLDecl &other);
   /**
      * Assignment operator.  This overloaded variant is provided for
      *   the sole purpose of setting a DOM_Node reference variable to
      *   zero.  Nulling out a reference variable in this way will decrement
      *   the reference count on the underlying Node object that the variable
      *   formerly referenced.  This effect is normally obtained when reference
      *   variable goes out of scope,but zeroing them can be useful for
      *   global instances,or for local instances that will remain in scope
      *   for an extended time,when the storage belonging to the underlying
      *   node needs to be reclaimed.
      *
      * @param val.  Only a value of 0,or null,is allowed.
      */

解决方法

通过修改代码解决了这个问题：

xml->root_node =(const DOM_XMLDecl&)(xml->doc.getFirstChild());

替换为：

xml->root_node =(const DOM_XMLDecl&) ( *new DOM_Node(xml->doc.getFirstChild()));