Defined in header <filesystem> | ||
using file_time_type=std::chrono::time_point</*trivial-clock*/>; | (since C++17) (until C++20) | |
using file_time_type=std::chrono::time_point<std::chrono::file_clock>; | (since C++20) | |
Represents file time.
/*trivial-clock*/ is an implementation-defined type that satisfiesTrivialClock and is sufficient to represent the resolution and range of the file time values offered by the filesystem. | (until C++20) |
#include <chrono>#include <filesystem>#include <format>#include <fstream>#include <iostream> usingnamespace std::chrono_literals; int main(){auto p=std::filesystem::temp_directory_path()/"example.bin";std::ofstream{p.c_str()}.put('a');// create file std::filesystem::file_time_type ftime=std::filesystem::last_write_time(p);std::cout<<std::format("File write time is {}\n", ftime); // move file write time 1 hour to the futurestd::filesystem::last_write_time(p, ftime+ 1h); // read back from the filesystem ftime=std::filesystem::last_write_time(p);std::cout<<std::format("File write time is {}\n", ftime); std::filesystem::remove(p);}
Possible output:
File write time is 2023-09-04 19:33:24.702639224File write time is 2023-09-04 20:33:24.702639224
(C++17) | gets or sets the time of the last data modification (function)[edit] |
