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

< cpp‎ | chrono‎ | day
Utilities library
Language support
Type support (basic types, RTTI)
Library feature-test macros (C++20)
Dynamic memory management
Program utilities
Coroutine support (C++20)
Variadic functions
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General utilities
Date and time
Function objects
Formatting library (C++20)
Relational operators (deprecated in C++20)
Integer comparison functions
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constexpr std::chrono::day& operator++() noexcept;
(1) (since C++20)
constexpr std::chrono::day operator++( int ) noexcept;
(2) (since C++20)
constexpr std::chrono::day& operator--() noexcept;
(3) (since C++20)
constexpr std::chrono::day operator--( int ) noexcept;
(4) (since C++20)

Adds or subtracts 1 from the day value.

1,2) Performs *this += std::chrono::days{1};.
3,4) Performs *this -= std::chrono::days{1};.


[edit] Parameters


[edit] Return value

1,3) A reference to this day after modification.
2,4) A copy of the day made before modification.

[edit] Notes

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

[edit] Example

#include <cassert>
#include <chrono>
int main()
    std::chrono::day d{15};
    assert(d == std::chrono::day(16));
    assert(d == std::chrono::day(15));

[edit] See also

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