std::chrono::duration<Rep,Period>::zero
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std::chrono::duration
Member functions
duration::zero
Non-member functions
(until C++20)(C++20)
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Helper classes
static constexpr duration zero();
(until C++20)
static constexpr duration zero() noexcept;
(since C++20)
Returns a zero-length duration.
If the representation rep of the duration requires some other implementation to return a zero-length duration, std::chrono::duration_values can be specialized to return the desired value.
Contents
[edit] Parameters
(none)
[edit] Return value
Returns duration(std::chrono::duration_values <rep>::zero()).
[edit] Example
Run this code
#include <chrono> #include <ratio> template<typename X, typename Y> using dura = std::chrono::duration <X, Y>; static_assert ( (std::chrono::hours::zero() == std::chrono::nanoseconds::zero()) && (dura<short, std::nano >::zero() == dura<int, std::deci >::zero()) && (dura<short, std::deca >::zero() == dura<long, std::exa >::zero()) && (dura<long, std::atto >::zero().count() == dura<float, std::exa >::zero().count()) ); int main() {}