我正在尝试使用C ++应用程序中的RapidXML库在控制台中打印XML文档数据。
这是我的C ++代码:
#include <iostream>
#include "rapidxml.hpp"
#include "rapidxml_utils.hpp"
#include "rapidxml_print.hpp"
int main() {
rapidxml::file<> xmlFile("beerJournal.xml");
rapidxml::xml_document<> doc;
doc.parse<0>(xmlFile.data());
std::cout << doc;
return 0;
}
这是错误:
rapidxml_print.hpp:115: error: ‘print_children’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
out = print_children(out, node, flags, indent);
~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
rapidxml_print.hpp:169: ‘template<class OutIt, class Ch> OutIt rapidxml::internal::print_children(OutIt, const rapidxml::xml_node<Ch>*, int, int)’ declared here, later in the translation unit
inline OutIt print_children(OutIt out, const xml_node<Ch> *node, int flags, int indent)
^~~~~~~~~~~~~~
观察:我已经尝试了手册(上面的链接)中介绍的其他两种RapidXML打印方法。
我的设置:
过去我遇到过同样的问题。从那以后,此SO答案中提出的解决方法一直非常适合我的所有GCC构建。
总结另一个答案的信息:归结为在GCC 4.7中进行的名称查找更改。解决方法包括创建一个文件rapidxml_ext.hpp
,其内容如下。然后包括rapidxml_ext.hpp
在您的客户端应用程序/库中。
rapidxml_ext.hpp
#pragma once
#include "rapidxml.hpp"
// Adding declarations to make it compatible with gcc 4.7 and greater
// See https://stackoverflow.com/a/55408678
namespace rapidxml {
namespace internal {
template <class OutIt, class Ch>
inline OutIt print_children(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_attributes(OutIt out, const xml_node<Ch>* node, int flags);
template <class OutIt, class Ch>
inline OutIt print_data_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_cdata_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_element_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_declaration_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_comment_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_doctype_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
template <class OutIt, class Ch>
inline OutIt print_pi_node(OutIt out, const xml_node<Ch>* node, int flags, int indent);
}
}
#include "rapidxml_print.hpp"
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