下面是一个完全独立的示例。问题似乎是第 84-89 行 - 如果这些行被注释掉，则示例编译。我要解析的是文件的每一行，有五个用冒号分隔的项目，最后三个项目是可选的。单个函数接受 a boost::filesystem::file，将其吸入 usingboost.interprocess并解析它。
我想要解析的示例：
a:1
a:2:c
a:3::d
a:4:::e
a:4:c:d:e
结果应该存储在 , 中vector<file_line>，并且file_line是一个有五个成员的结构，最后三个是可选的。这是代码和错误：
代码
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma warning(disable : 4512) // assignment operator could not be generated
# pragma warning(disable : 4127) // conditional expression is constant
# pragma warning(disable : 4244) // 'initializing' : conversion from 'int' to 'char', possible loss of data
#endif
#include <boost/fusion/adapted/struct/adapt_struct.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
#include <boost/spirit/home/qi.hpp>
#include <boost/spirit/home/qi/string.hpp>
#include <boost/spirit/home/karma.hpp>
#include <boost/spirit/home/karma/binary.hpp>
#include <boost/spirit/home/phoenix.hpp>
#include <boost/spirit/home/phoenix/bind.hpp>
#include <boost/spirit/home/phoenix/core.hpp>
#include <boost/spirit/home/phoenix/operator.hpp>
#include <boost/spirit/home/phoenix/statement/sequence.hpp>
#include <boost/fusion/include/std_pair.hpp>
#include <boost/interprocess/file_mapping.hpp>
#include <boost/interprocess/mapped_region.hpp>
#include <boost/filesystem/operations.hpp>
#include <string>
// This struct and fusion adapter is for parsing file servers in colon-newline format.
struct file_line
{
std::string a;
unsigned short b;
boost::optional<std::string> c;
boost::optional<std::string> d;
boost::optional<std::string> e;
};
BOOST_FUSION_ADAPT_STRUCT(
file_line,
(std::string, a)
(unsigned short, b)
(boost::optional<std::string>, c)
(boost::optional<std::string>, d)
(boost::optional<std::string>, e)
)
void
import_proxies_colon_newline(const boost::filesystem::path& file)
{
using namespace boost::spirit;
using qi::parse;
using qi::char_;
using qi::eol;
using qi::eoi;
using qi::lit;
using qi::ushort_;
// <word>:<ushort>:[word]:[word]:[word]
if(boost::filesystem::exists(file) && 0 != boost::filesystem::file_size(file))
{
// Use Boost.Interprocess for fast sucking in of the file. It works great, and provides the bidirectional
// iterators that we need for spirit.
boost::interprocess::file_mapping mapping(file.file_string().c_str(), boost::interprocess::read_only);
boost::interprocess::mapped_region mapped_rgn(mapping, boost::interprocess::read_only);
const char* beg = reinterpret_cast<char*>(mapped_rgn.get_address());
char const* const end = beg + mapped_rgn.get_size();
// And parse the data, putting the results into a vector of pairs of strings.
std::vector<file_line> output;
parse(beg, end,
// Begin grammar
(
*(
*eol
>> +(char_ - (':' | eol)
>> ':' >> ushort_
>> -(':'
>> *(char_ - (':' | eol))
>> (eol |
-(':'
>> *(char_ - (':' | eol))
// This doesn't work. Uncomment it, won't compile. No idea why. It's the same
// as above.
>> (eol |
-(':'
>>
+(char_ - eol)
)
)
)
)
)
>> *eol
)
)
// End grammar, begin output data
,output
);
}
}
来自 MSVC 10 的错误消息
由于问题限制为 30,000 个字符，因此我将仅在此处显示前几个。该示例应该尝试在您的机器上编译和生成相同的东西。
1>C:\devel\dependencies\boost\boost-1_44\include\boost/spirit/home/support/container.hpp(101): error C2955: 'boost::Container' : use of class template requires template argument list
1> C:\devel\dependencies\boost\boost-1_44\include\boost/concept_check.hpp(602) : see declaration of 'boost::Container'
1> C:\devel\dependencies\boost\boost-1_44\include\boost/spirit/home/qi/operator/kleene.hpp(65) : see reference to class template instantiation 'boost::spirit::traits::container_value<Container>' being compiled
1> with
1> [
1> Container=char
1> ]
1> C:\devel\dependencies\boost\boost-1_44\include\boost/spirit/home/qi/detail/fail_function.hpp(38) : see reference to function template instantiation 'bool boost::spirit::qi::kleene<Subject>::parse<Iterator,Context,Skipper,Attribute>(Iterator &,const Iterator &,Context &,const Skipper &,Attribute &) const' being compiled
1> with
1> [
1> Subject=boost::spirit::qi::difference<boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::char_,boost::spirit::char_encoding::standard>>,boost::spirit::qi::alternative<boost::fusion::cons<boost::spirit::qi::literal_char<boost::spirit::char_encoding::standard,true,false>,boost::fusion::cons<boost::spirit::qi::eol_parser,boost::fusion::nil>>>>,
1> Iterator=const char *,
1> Context=const boost::fusion::unused_type,
1> Skipper=boost::fusion::unused_type,
1> Attribute=char
1> ]
……剪……
1>C:\devel\dependencies\boost\boost-1_44\include\boost/spirit/home/support/container.hpp(102): fatal error C1903: unable to recover from previous error(s); stopping compilation