std::chrono::year::operator+=, std::chrono::year::operator-=
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std::chrono::year
Member functions
year::operator+=year::operator-=
Nonmember functions
Helper classes
(C++26)
constexpr std::chrono::year & operator+=( const std::chrono::years & y ) noexcept;
(1)
(since C++20)
constexpr std::chrono::year & operator-=( const std::chrono::years & y ) noexcept;
(2)
(since C++20)
Adds or subtracts y.count() years from the year value.
1) Equivalent to *this = *this + y;.
2) Equivalent to *this = *this - y;.
Contents
[edit] Return value
A reference to this year after modification.
[edit] Notes
If the result would be outside the range [-32767, 32767], the actual stored value is unspecified.
[edit] Example
Run this code
#include <chrono> #include <iostream> int main() { using namespace std::literals::chrono_literals; std::cout << std::boolalpha ; std::chrono::year y{2020}; y += std::chrono::years (12); std::cout << (y == 2032y) << ' '; y -= std::chrono::years (33); std::cout << (y == 1999y) << '\n'; }
Output:
true true