gistfile1.cpp

#include <map>
#include <boost/filesystem.hpp>

int main() {

    std::map<float, std::vector<boost::filesystem::path>> labeledImages;
    labeledImages[3] = { boost::filesystem::path("/"), };
    labeledImages[7] = { boost::filesystem::path("/"), boost::filesystem::path("/tmp"), };

    for (auto& labeledPathsPair : labeledImages) {
        std::vector< boost::filesystem::path > tmpVec = labeledPathsPair.second; // here
    }
}