std::chrono::duration<Rep,Period>::zero

Since C++20

Returns a zero-length duration.

# Declarations

static constexpr duration zero();

(until C++20)

static constexpr duration zero() noexcept;

(since C++20)

# Return value

Returns duration(std::chrono::duration_values::zero()).

# Example

#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