Extract the parent folder of a directory using boost::filesystem

Question

Suppose I have the following folder

std::string m("C:\MyFolderA\MyFolderB\MyFolderC");
boost::filesystem::path p(m);

Is there anyway for me to extract the parent of this folder. I want to get the string MyFolderB. from the above path.

Answer 1

There is method parent_path, check the docs.

Answer 2

Or, if you prefer a string manipulation method.

#include <algorithm>

const std::string m("C:\\MyFolderA\\MyFolderB\\MyFolderC");
const std::string slash("\\");
auto last_slash(std::find_end(std::cbegin(m), 
                              std::cend(m), 
                              std::cbegin(slash),
                              std::cend(slash)));
auto second_to_last_slash(std::find_end(std::cbegin(m), 
                                        last_slash,
                                        std::cbegin(slash), 
                                        std::cend(slash)));

const std::string parent(++second_to_last_slash, last_slash);

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