std::experimental::filesystem::file_time_type (3) - Linux Manuals

std::experimental::filesystem::file_time_type: std::experimental::filesystem::file_time_type

Command to display std::experimental::filesystem::file_time_type manual in Linux: $ man 3 std::experimental::filesystem::file_time_type

NAME

std::experimental::filesystem::file_time_type - std::experimental::filesystem::file_time_type

Synopsis

Defined in header <experimental/filesystem>
using file_time_type = chrono::time_point</*trivial-clock*/>; (filesystem TS)

Represents file time. trivial-clock is an implementation-defined type that satisfies TrivialClock and is sufficient to represent the resolution and range of the file time values offered by the filesystem.

Example

// Run this code

  #include <iostream>
  #include <chrono>
  #include <iomanip>
  #include <fstream>
  #include <experimental/filesystem>
  namespace fs = std::experimental::filesystem;
  using namespace std::chrono_literals;
  int main()
  {
      fs::path p = fs::current_path() / "example.bin";
      std::ofstream(p.c_str()).put('a'); // create file
      auto ftime = fs::last_write_time(p);

std::time_t cftime = decltype(ftime)::clock::to_time_t(ftime); // assuming system_clock
std::cout << "File write time is " << std::asctime(std::localtime(&cftime)) << '\n';

fs::last_write_time(p, ftime + 1h); // move file write time 1 hour to the future
ftime = fs::last_write_time(p); // read back from the filesystem

      cftime = decltype(ftime)::clock::to_time_t(ftime);
      std::cout << "File write time is " << std::asctime(std::localtime(&cftime)) << '\n';
      fs::remove(p);
  }

Possible output:

File write time is Tue Mar 31 19:47:04 2015

File write time is Tue Mar 31 20:47:04 2015