Question

提升1.49 gcc版本4.6.3

        std::transform(barcodeFiles.begin(), barcodeFiles.end(), std::ostream_iterator<std::string>(std::cerr, "\n"),
            boost::bind(&fs::path::string, _1));

如何编辑此代码？

[ 65%] Building CXX object c++/lib/demultiplex/CMakeFiles/casava_demultiplex.dir/BclDemultiplexer.cpp.o
/bak/software/Linux/CASAVA_v1.8.2/src/c++/lib/demultiplex/BclDemultiplexer.cpp: In member function ‘const casava::demultiplex::BclDemultiplexer::ClusterCorrectedBarcodeIndex casava::demultiplex::BclDemultiplexer::mapClusterBarcodes(unsigned int) const’:
/bak/software/Linux/CASAVA_v1.8.2/src/c++/lib/demultiplex/BclDemultiplexer.cpp:65:50: error: no matching function for call to ‘bind(, boost::arg&)’
/bak/software/Linux/CASAVA_v1.8.2/src/c++/lib/demultiplex/BclDemultiplexer.cpp:65:50

Answer 1

答案可以在FAQ of boost bind

中找到

std::transform(
    paths.begin(), paths.end(),
    std::ostream_iterator<std::string>(
        std::cerr, "\n"
    ),
    boost::bind(
        static_cast<
            std::string const & (boost::filesystem::path::*)() const
        >(&boost::filesystem::path::string), 
        _1
    )
);

Answer 2

如果你可以使用C ++ 11（GCC 4.6使用标志-std = c ++ 0x支持它），那么你可以使用lambda函数，它将变得更具可读性：

std::transform(barcodeFiles.begin(), barcodeFiles.end(),
               std::ostream_iterator<std::string>(std::cerr, "\n"),
               [](const fs::path& p) {
                   return p.string();
               }
);

未解决的重载函数类型为＆＃34; fs :: path :: string＆＃34;

2 个答案: