std::chrono::duration<Rep,Period>::operator+(unary), std::chrono::duration<Rep,Period>::operator-(unary)

Since C++17

Implements unary plus and unary minus for the durations.

# Declarations

constexpr duration operator+() const;

(until C++17)

constexpr std::common_type_t<duration> operator+() const;

(since C++17)

constexpr duration operator-() const;

(until C++17)

constexpr std::common_type_t<duration> operator-() const;

(since C++17)

# Example

#include <chrono>
#include <iostream>
 
int main()
{
    constexpr std::chrono::seconds s1(-052);
    constexpr std::chrono::seconds s2 = -s1;
 
    std::cout << "Negated " << s1 << " are " << s2 << '\n';
}

# See also