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Moving a directory with boost :: without exception

I have a directory path, and I want to go through all its subdirectories, collecting files. By the way

namespace fs = boost::filesystem;

std::vector<fs::path> traverse_if_directory(fs::path& f) {
    std::vector<fs::path> result;
    if (fs::is_directory(f)) {      
        for (fs::recursive_directory_iterator it(f), eit; it != eit; ++it) {
            if (!fs::is_directory(it->path())) {
                result.push_back(it->path());
            }       
        }
    }
    else {
        result.push_back(f);
    }

    return result;
}

Unfortunately, in the middle of the passage, I stumble upon a directory that I do not have the right to look at, and the code above throws. But, obviously, in this case this is not an exception, I just have to continue by skipping this locked directory.

But how do I do this?

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2 answers

Ha, it turned out there is a way:

std::vector<fs::path> traverse_if_directory(fs::path& f) {
    std::vector<fs::path> result;
    boost::system::error_code ec;

    if (fs::is_directory(f)) {      
        for (
             fs::recursive_directory_iterator it(f, ec), eit;
             it != eit;
             it.increment(ec)
            ) {
            if (ec) {
                it.pop();
                continue;
            }
            if (!fs::is_directory(it->path())) {
                result.push_back(it->path());
            }
        }
    }
    else {
        result.push_back(f);
    }

    return result;
}

There is a non-flashing overload that accepts an output parameter of type boost::system::error_code, so I can just check after each increment if there is any error.

+7
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Joker_vD . , . "it.pop()", , -, . , "" , . .

:

std::vector<fs::path> traverse_if_directory(const fs::path& f) {
    std::vector<fs::path> result;
    boost::system::error_code ec;

    if (fs::is_directory(f)) {
        for (fs::recursive_directory_iterator it{f, ec}, end; it != end; it.increment(ec)) {
            if (!fs::is_directory(it->path())) {
                result.push_back(it->path());
            }
        }
    }
    else {
        result.push_back(f);
    }

    return result;
}
+1

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