std::chrono::duration<Rep,Period>::operator++,std::chrono::duration<Rep,Period>::operator-- (3) - Linux Manuals

std::chrono::duration<Rep,Period>::operator++,std::chrono::duration<Rep,Period>::operator--: - std::chrono::duration<Rep,Period>::operator++,std::chrono::duration<Rep,Period>::operator--

NAME

std::chrono::duration<Rep,Period>::operator++,std::chrono::duration<Rep,Period>::operator-- - std::chrono::duration<Rep,Period>::operator++,std::chrono::duration<Rep,Period>::operator--

Synopsis

duration& operator++(); (until C++17)
constexpr duration& operator++(); (since C++17)
duration operator++(int); (until C++17)
constexpr duration operator++(int); (1) (since C++17)
duration& operator--(); (2) (until C++17)
constexpr duration& operator--(); (3) (since C++17)
duration operator--(int); (4) (until C++17)
constexpr duration operator--(int); (since C++17)

Increments or decrements the number of ticks for this duration.
If rep_ is a member variable holding the number of ticks in a duration object,
1) Equivalent to ++rep_; return *this;
2) Equivalent to return duration(rep_++)
3) Equivalent to --rep_; return *this;
4) Equivalent to return duration(rep_--);

Parameters

(none)

Return value

1,3) a reference to this duration after modification
2,4) a copy of the duration made before modification

Example

// Run this code

  #include <chrono>
  #include <iostream>

  int main()
  {
      std::chrono::hours h(1);
      std::chrono::minutes m = ++h;
      m--;
      std::cout << m.count() << " minutes\n";
  }

Output:

  119 minutes