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

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< cpp‎ | chrono‎ | day
 
 
Utilities library
General utilities
Date and time
Function objects
Formatting library (C++20)
(C++11)
Relational operators (deprecated in C++20)
Integer comparison functions
(C++20)(C++20)(C++20)   
(C++20)
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(C++14)
(C++11)
(C++11)
(C++11)
(C++17)
Common vocabulary types
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(C++17)
(C++17)
(C++17)
(C++11)
(C++17)
(C++23)
Elementary string conversions
(C++17)
(C++17)
 
 
 
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};

Parameters

(none)

Return value

1,3) a reference to this day after modification
2,4) a copy of the day made before 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;
    assert(d == std::chrono::day(16));
 
    --d;
    assert(d == std::chrono::day(15));
}

See also

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