std::chrono::day::operator++, std::chrono::day::operator--

constexpr std::chrono::day& operator++() noexcept;
(1) (since C++20)
constexpr std::chrono::day operator++( int ) noexcept;
(2) (since C++20)
constexpr std::chrono::day& operator--() noexcept;
(3) (since C++20)
constexpr std::chrono::day operator--( int ) noexcept;
(4) (since C++20)

Adds or subtracts 1 from the day value.

1-2) Performs *this += std::chrono::days{1};
3-4) Performs *this -= std::chrono::days{1};



Return value

1,3) a reference to this day after modification
2,4) a copy of the day made before modification


If the result would be outside the range [0, 255], the actual stored value is unspecified.


#include <cassert>
#include <chrono>
int main()
    std::chrono::day d {15};
    assert(d == std::chrono::day(16));
    assert(d == std::chrono::day(15));

See also

adds or subtracts a number of days
(public member function)
adds or subtracts a number of days and a day, or find the difference between two days

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