boost directory_iterator example - how to list directory files not recursive

问题

How should I use directory_iterator to list directory files (not recursive)?

Also what header files / libs should I add/link or other settings I should make? I'm using boost in my project but by some reason directory_iterator is "underclared identifier" while I can use other boost features.

Update

Another solution:

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

using namespace boost::filesystem;

for (directory_iterator itr(path_ss); itr!=directory_iterator(); ++itr)
{
    cout << itr->path().filename() << ' '; // display filename only
    if (is_regular_file(itr->status())) cout << " [" << file_size(itr->path()) << ']';
    cout << '\n';
}

回答1:

The tut3 example is what you're looking for:

See it Live on Coliru

Here's a simplified version based on c++11:

Live On Coliru

#include <boost/filesystem.hpp>
#include <boost/range/iterator_range.hpp>
#include <iostream>

using namespace boost::filesystem;

int main(int argc, char *argv[]) {
    path p(argc>1? argv[1] : ".");

    if(is_directory(p)) {
        std::cout << p << " is a directory containing:\n";

        for(auto& entry : boost::make_iterator_range(directory_iterator(p), {}))
            std::cout << entry << "\n";
    }
}

You can see I linked boost_system (for the errorcode facilities) and boost_filesystem:

g++ -std=c++11 -Os -Wall -pedantic main.cpp -lboost_system -lboost_filesystem && ./a.out .
"." is a directory containing:
"./main.cpp"
"./a.out"

回答2:

A tested solution:

#include <boost/filesystem.hpp>
#include <iterator>
#include <iostream>
#include <vector>

using namespace boost::filesystem;

int main(int argc, char *argv[])
{
    path p(argc>1? argv[1] : ".");
    std::vector<directory_entry> v; // To save the file names in a vector.

    if(is_directory(p))
    {
        copy(directory_iterator(p), directory_iterator(), back_inserter(v));
        std::cout << p << " is a directory containing:\n";

        for ( std::vector<directory_entry>::const_iterator it = v.begin(); it != v.end();  ++ it )
        {
            std::cout<< (*it).path().string()<<endl;
        }    
    }
}

来源：https://stackoverflow.com/questions/20923456/boost-directory-iterator-example-how-to-list-directory-files-not-recursive

标签

boost

boost-filesystem