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

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++,

Synopsis

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