NAME¶

std::chrono::duration::zero - std::chrono::duration::zero

Synopsis¶

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.

Parameters¶

(none)

Return value¶

Returns duration(std::chrono::duration_values<rep>::zero()).

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() {}

See also¶

min returns the special duration value min
[static] (public static member function)
max returns the special duration value max
[static] (public static member function)