C++ std::filesystem 提取目录下全部的pcd文件名(C++17以上)

#include    <filesystem>

static  void    Get_All_PCD_File(const std::string  &pcd_dir, std::vector<std::string> &file_paths)
{
    file_paths.clear();
    if(std::filesystem::exists(pcd_dir) && std::filesystem::is_directory(pcd_dir)){
        try{
            for(const auto& entry : std::filesystem::directory_iterator(pcd_dir)){
                if(std::filesystem::is_regular_file(entry.path())){
                    if(entry.path().extension() !=".pcd" && entry.path().extension() !=".PCD"){
                        continue;
                    }
                    file_paths.push_back(entry.path().string());
                }
            }
        }catch(const std::filesystem::filesystem_error& e) {
            std::cerr << "Filesystem error: " << e.what() << std::endl;
            return;
        }
    }else{
        printf("Err: path is not exist!\n");
        return;
    }
    return;
}