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

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< cpp ‎ | chrono ‎ | day
C++
Utilities library
General utilities
Relational operators (deprecated in C++20)
Date and time utilities
Time point
(C++11)
(C++20)
Duration
(C++11)
Clocks
(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)
Time zone
(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 ] , 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)
(C++20)
adds or subtracts a number of days and a day , or find the difference between two day s
(function)
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