问题描述
限时送ChatGPT账号..我正在尝试使用 boost 属性树 write_json 进行序列化,它将所有内容保存为字符串,并不是数据错误,但我每次都需要显式转换它们,并且我想在其他地方使用它们.(如在 python 或其他 C++ json(非 boost)库中)
I'm trying to serialize using boost property tree write_json, it saves everything as strings, it's not that data are wrong, but I need to cast them explicitly every time and I want to use them somewhere else. (like in python or other C++ json (non boost) library)
这里是一些示例代码以及我根据语言环境得到的内容:
here is some sample code and what I get depending on locale:
boost::property_tree::ptree root, arr, elem1, elem2;
elem1.put<int>("key0", 0);
elem1.put<bool>("key1", true);
elem2.put<float>("key2", 2.2f);
elem2.put<double>("key3", 3.3);
arr.push_back( std::make_pair("", elem1) );
arr.push_back( std::make_pair("", elem2) );
root.put_child("path1.path2", arr);
std::stringstream ss;
write_json(ss, root);
std::string my_string_to_send_somewhare_else = ss.str();
和 my_string_to_send_somewhere_else
是……像这样:
and my_string_to_send_somewhere_else
is sth. like this:
{
"path1" :
{
"path2" :
[
{
"key0" : "0",
"key1" : "true"
},
{
"key2" : "2.2",
"key3" : "3.3"
}
]
}
}
无论如何将它们保存为值,例如:"key1" : true
还是 "key2" : 2.2
?
Is there anyway to save them as the values, like:
"key1" : true
or "key2" : 2.2
?
推荐答案
我最终在我的工具中添加了另一个函数来解决这个问题:
I ended up adding another function to my utils to solve this:
#include <string>
#include <regex>
#include <boost/property_tree/json_parser.hpp>
namespace bpt = boost::property_tree;
typedef bpt::ptree JSON;
namespace boost { namespace property_tree {
inline void write_jsonEx(const std::string & path, const JSON & ptree)
{
std::ostringstream oss;
bpt::write_json(oss, ptree);
std::regex reg("\"([0-9]+\.{0,1}[0-9]*)\"");
std::string result = std::regex_replace(oss.str(), reg, "$1");
std::ofstream file;
file.open(path);
file << result;
file.close();
}
} }
希望有所帮助.
这篇关于为什么 Boost 属性树 write_json 将所有内容保存为字符串?有可能改变吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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