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

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Utilities library

Type support (basic types, RTTI, type traits)

Dynamic memory management

Error handling

Program utilities

Variadic functions

Date and time

Function objects

initializer_list (C++11)

bitset

hash (C++11)

Relational operators

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Pairs and tuples

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, forward and move

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Date and time utilities

time_point (C++11)

duration (C++11)

system_clock (C++11)

steady_clock (C++11)

high_resolution_clock (C++11)

C-style date and time

 

std::chrono::duration

Member functions

duration::duration

duration::operator=

duration::count

duration::zero

duration::min

duration::max

duration::operator+ duration::operator-

duration::operator++ duration::operator--

duration::operator+= duration::operator-= duration::operator*= duration::operator/= duration::operator%=

Non-member functions

common_type

operator+ operator- operator* operator/ operator%

operator== operator!= operator< operator<= operator> operator>=

duration_cast

Helper classes

treat_as_floating_point

duration_values

 

duration& operator++();	(1)
duration operator++(int);	(2)
duration& operator--();	(3)
duration operator--(int);	(4)

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