DEMO CHRONO PLUS SOFTWARE CODE

print duration (such as the difference between 2 time_points) (As Cassio Neri points out in a comment to your question, the more C++-y std::put_time function is not yet supported by GCC).įor anyone working with time_point (not time_point): #include Ĭonst std::intmax_t ticks = unt() ĭuration ago = timepoint.time_since_epoch() Having solved this compiler error, the conversion to time_t works just fine: std::time_t now_c = std::chrono::system_clock::to_time_t(time_point) Īnd you can now use standard methods for displaying time_t values, like std::ctime or std::strftime. Since this is C++11, you can also just use auto: auto time_point = system_clock::now() Time_point = system_clock::now() // no time_point_cast needed A simple way to do that is to use the system_clock::time_point typedef: system_clock::time_point time_point Of course in your case, since you are just looking to print the time point, there is no need for it to be at any specific resolution, so you can just declare time_point to be the same type as what system_clock::now() returns to begin with.

The clock types must match in a time_point_cast, so specifying the entire time_point type (which is templated on both the clock type and the duration type) would be redundant. Notice the explicit template parameter to time_point_cast is the target duration type, not the target time_point type.

Time_point = time_point_cast(system_clock::now()) You can explicitly convert time points with different durations using time_point_cast, so the following would compile on your system: time_point time_point Time_points with different durations are not implicitly convertible to one another, so you get a compiler error. It seems that your implementation uses microseconds, so the return type of system_clock::now() is time_point. system_clock::duration is implementation-defined, with microseconds and nanoseconds being commonly used. The documented return value of system_clock::now() is system_clock::time_point, which is a typedef for time_point.

DEMO CHRONO PLUS SOFTWARE CODE

The reason your code example fails to compile is that there is a mismatch between the return type of system_clock::now() and the type of variable you are trying to assign this to ( time_point). (In this post I will omit std::chrono:: qualifications for clarity. std::time_t now_c = std::chrono::system_clock::to_time_t(time_point) //does not compileĮrror: /usr/lib/gcc/x86_64-redhat-linux/4.7.2/././././include/c++/4.7.2/chrono: In instantiation of ‘constexpr std::chrono::time_point::time_point(const std::chrono::time_point&) ’:

However, I'm not even able to create a time_t based on my time_point(like the example). The only documentation I can find that prints a time_point is found here: Time_point = std::chrono::system_clock::now() I've created a time point, but I have been struggling to print it to the terminal.

Demo chrono plus software