std::chrono::day::operator+=,std::chrono::day::operator-= (3) - Linux Manuals

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

NAME

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

Synopsis

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

 This section is incomplete
 Reason: no example