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std::experimental::filesystem::file_time_type(3) C++ Standard Libary std::experimental::filesystem::file_time_type(3)


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


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.


// Run this code

#include <chrono>
#include <experimental/filesystem>
#include <fstream>
#include <iomanip>
#include <iostream>
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';

Possible output:

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

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

See also

last_write_time gets or sets the time of the last data modification


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