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

From cppreference.com
< cpp‎ | chrono‎ | day
C++
Date and time library
Time point
(C++11)
(C++20)
Duration
(C++11)
Clocks
(C++11)
(C++11)
(C++20)
(C++20)
(C++20)
(C++11)
(C++20)
(C++20)
(C++20)
Time of day
(C++20)(C++20)
(C++20)(C++20)
(C++20)

Calendar
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)(C++20)
Time zone
(C++20)
(C++20)
(C++20) (C++20) (C++20) (C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
chrono I/O
(C++20)
C-style date and time
std::chrono::day
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 ]

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)
(C++20)
 adds or subtracts a number of days and a day, or find the difference between two days
(function)
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/chrono/day/operator_inc_dec&oldid=157495