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

From cppreference.com
< cpp‎ | chrono‎ | day
 
 
Date and time library
(C++11)
(C++20)
(C++11)
(C++11)
(C++11)
(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)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)(C++20)
(C++20)

 
 
constexpr std::chrono::day & operator+=( const std::chrono::days & d ) noexcept;
(1) (since C++20)
constexpr std::chrono::day & operator-=( const std::chrono::days & d ) noexcept;
(2) (since C++20)

Adds or subtracts d.count() days from the day value.

1) Equivalent to *this = *this + d;.
2) Equivalent to *this = *this - d;.

[edit] Return value

A reference to this day after modification.

[edit] Notes

If the result would be outside the range [0255], the actual stored value is unspecified.

[edit] Example

Run this code
#include <cassert>
#include <chrono>
 
int main()
{
 std::chrono::day d{15};
 
 d += std::chrono::days (2);
 assert (d == std::chrono::day (17));
 
 d -= std::chrono::days {3};
 assert (d == std::chrono::day (14));
}

[edit] See also

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