std::experimental::filesystem::path::parent_path
Min standard notice:
Returns the path to the parent directory. Returns empty path if empty() or there’s only a single element in the path (begin() == –end()).
# Declarations
path parent_path() const;
(filesystem TS)
# Return value
The path to the parent directory.
# Example
#include <experimental/filesystem>
#include <iostream>
namespace fs = std::experimental::filesystem;
int main()
{
for (fs::path p : {"/var/tmp/example.txt", "/", "/var/tmp/."})
std::cout << "The parent path of " << p
<< " is " << p.parent_path() << '\n';
}