在程序选项中使用hashmark值(ini文件) [英] using hashmark in program options value (ini file)
问题描述
使用boost程序选项从ini文件读取数据有些麻烦。问题是包含散列符号(简单示例)的键:
I have some trouble reading from an ini file using boost program options. The problem is a key which contains hashmarks (simplyfied example):
[section]
key =xxx#yyy
[section]
key="xxx#yyy"
检索键,返回xxx,这是因为哈希标记似乎被解释为注释的开始,因此跳过其余行。不幸的是,我不能用'#'替换一些其他字符,因为值是一个正则表达式。我没有找到一个方法来引用哈希标记,并不喜欢这样做,因为它会改变我的正则表达式,使它更不可读。
Retrieving the key, returns "xxx", which is because the hashmark seems to be interpreted as start of a comment and therefore the rest of the line is skipped. Unfortunately I cannot substitute the '#' by some other character because the value is a regular expression. I didn't find a way to quote the hashmark and would prefer not to do it, because it would alter my regex and make it even more unreadable.
有方式来处理这个问题,而不重写ini文件解析器?
感谢任何帮助。
Is there a way to deal with this problem without rewriting the ini-file parser? Thanks for any help.
我检索密钥的代码如下:
My code to retrieve the key looks like:
std::string key;
boost::program_options::options_description opDesc("test");
opDesc.add_options()("section.key", po::value<string>(&key))
std::ifstream ifs("file.ini");
boost::program_options::parse_config_file(ifs, opDesc);
推荐答案
也许现在是开始使用 Boost属性树,因为您正在通过我正在解析程序options'点这里,真的。
Perhaps it is time to start using Boost Property Tree as you are way past the 'I'm parsing program options' point here, really.
http://www.boost.org/doc/libs/1_46_1/doc/html/property_tree.html
媒体资源树具有JSON,Xml,Ini(< - 你在这里
)和INFO格式的解析器/格式化程序。链接页面在几行中指定了什么往返(大多数事情往返,除了JSON的唯一类型信息和有时候尾随的空格)。
Property tree has parsers/formatters for JSON, Xml, Ini (<-- you are here
) and the INFO formats. The linked page specifies in a few lines exactly what round-trips (most things roundtrip, except for JSON sepcific type information and sometimes trailing whitespace).
像INI格式(因为它接近你使用的)和INFO设置(因为它有更多的字符串语法,除了分层嵌套的部分)。
I suppose you'd like the INI format (because it's close to what you're using) and the INFO setting (because it has more string syntax, in addition to hierarchically nested sections).
从示例:
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
#include <boost/foreach.hpp>
#include <string>
#include <set>
#include <exception>
#include <iostream>
struct debug_settings
{
std::string m_file; // log filename
int m_level; // debug level
std::set<std::string> m_modules; // modules where logging is enabled
void load(const std::string &filename);
void save(const std::string &filename);
};
void debug_settings::load(const std::string &filename)
{
using boost::property_tree::ptree;
ptree pt;
read_xml(filename, pt);
m_file = pt.get<std::string>("debug.filename");
m_level = pt.get("debug.level", 0);
BOOST_FOREACH(ptree::value_type &v, pt.get_child("debug.modules"))
m_modules.insert(v.second.data());
}
void debug_settings::save(const std::string &filename)
{
using boost::property_tree::ptree;
ptree pt;
pt.put("debug.filename", m_file);
pt.put("debug.level", m_level);
BOOST_FOREACH(const std::string &name, m_modules)
pt.add("debug.modules.module", name);
write_xml(filename, pt);
}
int main()
{
try
{
debug_settings ds;
ds.load("debug_settings.xml");
ds.save("debug_settings_out.xml");
std::cout << "Success\n";
}
catch (std::exception &e)
{
std::cout << "Error: " << e.what() << "\n";
}
return 0;
}
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