//————-
else
std::cout<<p.leaf()<<” is a regular file.\n”;
//————-

here is a modified snippet from a project I am currently working on:

namespace fs = boost::filesystem;
void filetype_handler::classify(fs::path mypath){
try{
if (fs::is_directory(mypath)){ //is it a directory
std::cerr << mypath << ” is a directory” << std::endl;
}
else if (fs::is_regular(mypath)){ //is it a regular file
std::cerr << mypath << ” is a regular file” << std::endl;
}
else if (fs::is_symlink(mypath)){ //is it a symbolic link?
std::cerr << mypath << ” is a symlink” << std::endl;
}
else if (fs::is_other(mypath)){ //its something else…
std::cerr << mypath << ” is an unknown filesystem entity” << std::endl;
}
else{} // should theoretically be equivalent to fs::is_other() branch above.
}catch(fs::basic_filesystem_error e){
std::cerr << “Cannot read path \”" << mypath << “\” : “<< e.what() <<”\n”;
}
}