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};.

Parameters

(none)

Return value

1,3) A reference to this day after modification.

2,4) A copy of the day made before modification.

Notes

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

Example

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

operator+=operator-=	adds or subtracts a number of days (public member function)
operator+operator- (C++20)	adds or subtracts a number of days and a `day`, or find the difference between two `day`s (function)

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

Parameters

Return value

Notes

Example

See also