std::filesystem::file_time_type
Defined in header <filesystem> |
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using file_time_type = std::chrono::time_point</*trivial-clock*/>; |
(since C++17) (until C++20) |
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using file_time_type = std::chrono::time_point<std::chrono::file_clock>; |
(since C++20) |
Represents file time.
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(until C++20) |
Example
#include <iostream>
#include <chrono>
#include <iomanip>
#include <fstream>
#include <filesystem>
using namespace std::chrono_literals;
int main()
{
auto p = std::filesystem::temp_directory_path() / "example.bin";
std::ofstream(p.c_str()).put('a'); // create file
auto print_last_write_time = [](std::filesystem::file_time_type const& ftime) {
std::time_t cftime = std::chrono::system_clock::to_time_t(
std::chrono::file_clock::to_sys(ftime));
std::cout << "File write time is " << std::asctime(std::localtime(&cftime));
};
auto ftime = std::filesystem::last_write_time(p);
print_last_write_time(ftime);
std::filesystem::last_write_time(p, ftime + 1h); // move file write time 1 hour to the future
ftime = std::filesystem::last_write_time(p); // read back from the filesystem
print_last_write_time(ftime);
std::filesystem::remove(p);
}
Possible output:
File write time is Sun May 9 23:29:58 2021 File write time is Mon May 10 00:29:58 2021
See also
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(C++17)
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gets or sets the time of the last data modification (function) |
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