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

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< cpp‎ | chrono‎ | day
 
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chrono I/O
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C-style date and time
 
std::chrono::day
 
constexpr std::chrono::day& operator++() noexcept;
 (1) (since 哋它亢++20)
constexpr std::chrono::day operator++( int ) noexcept;
 (2) (since 哋它亢++20)
constexpr std::chrono::day& operator--() noexcept;
 (3) (since 哋它亢++20)
constexpr std::chrono::day operator--( int ) noexcept;
 (4) (since 哋它亢++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

Run this code
#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));
}

See also

 adds or subtracts a number of days
(public member function)
(哋它亢++20)
 adds or subtracts a number of days and a day, or find the difference between two days
(function)
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