Rewrite code from c ++ 11 to c ++ 03.

Question

Hello, help rewrite code from c ++ 11 standard under c ++ 03 standard.

#include <iostream> #include <iterator> #include <string> #include <cerrno> #include <cstdlib> #include <iostream> #include <boost/foreach.hpp> using namespace std; class directory_range { directory_range(bfs_dir_iter itr): _itr(itr) bfs_dir_iter _itr; public: directory_range(bfs_dir_iter&& itr): _itr(itr) { } bfs_dir_iter begin() { return _itr; } bfs_dir_iter end() { return bfs_dir_iter(); } }; int main() { namespace bfs = boost::filesystem3; bfs::path p("/home/root/test/"); if(!bfs::is_directory(p)) { std::cerr << "[ ERROR ] "; std::cerr << p << " isn't directory. Stopping...." << std::endl; return ENOENT; } const char** dirs_begin = dirs; const char* dirs[] = {"part1", "part2", "part3", "part4", "part5"}; BOOST_FOREACH(const char* dir, dirs) try { bfs::create_directory(p / dir); } catch(const bfs::filesystem_error& e) { std::cerr << "[ ERROR ] "; std::cerr << (p / dir).filename() << " is already exists and not directory. " << "Stopping..." << std::endl; return ENOENT; } const char** dirs_iter = dirs; BOOST_FOREACH (const bfs::directory_entry& file, std::make_pair(bfs::directory_iterator(p), bfs::directory_iterator())) { if(!bfs::is_regular_file(file)) { std::cerr << "[WARNING] "; std::cerr << file.path().filename() << " isn't regular file. " << "Go to the hell, I will not copy it." << std::endl; } else { if(bfs::exists(p / *dirs_iter / file.path().filename())) { std::cerr << "[WARNING] "; std::cerr << file.path().filename() << " is already exists in " << *dirs_iter << ". Skipping..." << std::endl; continue; } bfs::copy(file, p / *dirs_iter++ / file.path().filename()); if(dirs_iter == dirs_end) dirs_iter = dirs_begin; } } return 0; }

Remove all the rvalue references, auto and range-based for - and everything works.
Do not just remove, but rewrite within the framework of the standard C ++ 2003
@karr, According to the rules of the forum, questions should not be reduced to offers to do the work.
And sorry, well, it is not clear exactly what needs to be removed, added, changed, so that the code meets the C ++ 2003 standard, I never bother with these standards ...

dzhioev dzhioev 10.8k 16 silver marks 35 bronze marks · Accepted Answer · 2012-08-13T07:07:06

Something like this. for (:) change to BOOST_FOREACH and explicitly indicate the types everywhere, instead of auto:

 6a7 > #include <boost/foreach.hpp> 14c15 < directory_range(bfs_dir_iter&& itr): _itr(itr) --- > directory_range(bfs_dir_iter itr): _itr(itr) 41a43,44 > const char** dirs_begin = dirs; > const char** dirs_end = dirs + sizeof(dirs) / sizeof(const char*); 43c46 < for(const auto& dir: dirs) --- > BOOST_FOREACH(const char* dir, dirs) 57,58c60,63 < auto dirs_iter = std::begin(dirs); < for(const auto& file: directory_range(bfs::directory_iterator(p))) --- > const char** dirs_iter = dirs; > BOOST_FOREACH (const bfs::directory_entry& file, > std::make_pair(bfs::directory_iterator(p), > bfs::directory_iterator())) 78,79c83,84 < if(dirs_iter == std::end(dirs)) < dirs_iter = std::begin(dirs); --- > if(dirs_iter == dirs_end) > dirs_iter = dirs_begin;

Began to replace, it turned out some kind of porridge ... In the end, it did not compile, as I expected ...
@karr You were given a patch, how can you not remove / add something?
@karr, a comment to the fact that these changes should not have been made by hand, but applied using the patch utility.

Rewrite code from c ++ 11 to c ++ 03.

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