std::chrono::day::operator+=, std::chrono::day::operator-=
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;
Return value
A reference to this day
after modification.
Notes
If the result would be outside the range [0, 255], the actual stored value is unspecified.
Example
#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)); }
See also
increments or decrements the day (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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