NAME

std::chrono::duration::operator++, - std::chrono::duration::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

See also

operator+=
operator-= implements compound assignment between two durations
operator*= (public member function)
operator/=
operator%=
operator+
operator-
operator* implements arithmetic operations with durations as arguments
operator/ (function template)
operator%
(C++11)