std::chrono::operator+, std::chrono::operator- (std::chrono::day)
From cppreference.com
Defined in header <chrono>
|
||
|
constexpr
std::chrono::day operator+
(
const
std::chrono::day
& d,
const std::chrono::days & ds ) noexcept ; |
(1) | (since C++20) |
|
constexpr
std::chrono::day operator+
(
const
std::chrono::days
& ds,
const std::chrono::day & d ) noexcept ; |
(2) | (since C++20) |
|
constexpr
std::chrono::day operator-
(
const
std::chrono::day
& d,
const std::chrono::days & ds ) noexcept ; |
(3) | (since C++20) |
|
constexpr
std::chrono::days operator-
(
const
std::chrono::day
& x,
const std::chrono::day & y ) noexcept ; |
(4) | (since C++20) |
1,2) Adds ds.count() days to d
3) Subtracts ds.count() days from d
4) Calculate the difference, in days, between two day
x and y
Return value
1,2)
std::chrono::day
(
unsigned
(d)
+ ds.count
(
)
)
3)
std::chrono::day
(
unsigned
(d)
- ds.count
(
)
)
4)
std::chrono::days
(
int
(
unsigned
(x)
)
-
int
(
unsigned
(y)
)
)
Notes
1-3) If the result would be outside the range
[
0
,
255
]
Example
Run this code
#include <cassert> #include <chrono> int main() { std::chrono::day d{15}; d = d + std::chrono::days(2); assert(d == std::chrono::day(17)); d = d - std::chrono::days(3); assert(d == std::chrono::day(14)); constexpr std::chrono::days ds = std::chrono::day(16) - std::chrono::day(14); static_assert(ds == std::chrono::days(2)); }
See also
| increments or decrements the day (public member function) |
|
| adds or subtracts a number of days (public member function) |