recursive_directory_iterator dir(cwd, directory_options::skip_permission_denied);
    recursive_directory_iterator end_dir;

    parallel_for(begin(dir), end(dir), begin(dir), [&](recursive_directory_iterator dir) {

    });

Error   C2678   binary '<': no operator found which takes a left-hand operand of type 'std::filesystem::recursive_directory_iterator' (or there is no acceptable conversion)    app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2501
Error   C2678   binary '>=': no operator found which takes a left-hand operand of type 'std::filesystem::recursive_directory_iterator' (or there is no acceptable conversion)   app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2507
Error   C2784   'unknown-type std::operator -(const std::move_iterator<_RanIt> &,const std::move_iterator<_RanIt2> &)': could not deduce template argument for 'const std::move_iterator<_RanIt> &' from 'std::filesystem::recursive_directory_iterator'    app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2514
Error   C2784   'unknown-type std::operator -(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt2> &)': could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'std::filesystem::recursive_directory_iterator'   app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2514
Error   C2676   binary '-': 'std::filesystem::recursive_directory_iterator' does not define this operator or a conversion to a type acceptable to the predefined operator   app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2514
Error   C2672   '_Parallel_for_partitioned_impl': no matching overloaded function found app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2525
Error   C2893   Failed to specialize function template 'void Concurrency::_Parallel_for_partitioned_impl(_Index_type,_Diff_type,_Diff_type,const _Function &,const Concurrency::auto_partitioner &)'    app c:program files (x86)microsoft visual studio2017enterprisevctoolsmsvc14.14.26428includeppl.h  2525