time_point Class
The latest version of this topic can be found at time_point Class.
A time_point describes a type that represents a point in time. It holds an object of type duration that stores the elapsed time since the epoch that is represented by the template argument Clock.
Syntax
template <class Clock,
class Duration = typename Clock::duration>
class time_point;
Members
Public Typedefs
| Name | Description |
|---|---|
time_point::clock |
Synonym for the template parameter Clock. |
time_point::duration |
Synonym for the template parameter Duration. |
time_point::period |
Synonym for the nested type name duration::period. |
time_point::rep |
Synonym for the nested type name duration::rep. |
Public Constructors
| Name | Description |
|---|---|
| time_point::time_point Constructor | Constructs a time_point object. |
Public Methods
| Name | Description |
|---|---|
| time_point::max Method | Specifies the upper limit for time_point::ref. |
| time_point::min Method | Specifies the lower limit for time_point::ref. |
| time_point::time_since_epoch Method | Returns the stored duration value. |
Public Operators
| Name | Description |
|---|---|
| time_point::operator+= | Adds a specified value to the stored duration. |
| time_point::operator-= | Subtracts a specified value from the stored duration. |
Requirements
Header: chrono
Namespace: std::chrono
time_point::max Method
Static method that returns the upper bound for values of type time_point::ref.
static constexpr time_point max();
Return Value
In effect, returns time_point(duration::max()).
time_point::min Method
Static method that returns the lower bound for values of type time_point::ref.
static constexpr time_point min();
Return Value
In effect, returns time_point(duration::min()).
time_point::operator+=
Adds a specified value to the stored duration value.
time_point& operator+=(const duration& Dur);
Parameters
Dur
A duration object.
Return Value
The time_point object after the addition is performed.
time_point::operator-=
Subtracts a specified value from the stored duration value.
time_point& operator-=(const duration& Dur);
Parameters
Dur
A duration object.
Return Value
The time_point object after the subtraction is performed.
time_point::time_point Constructor
Constructs a time_point object.
constexpr time_point();
constexpr explicit time_point(const duration& Dur);
template <class Duration2>
constexpr time_point(const time_point<clock, Duration2>& Tp);
Parameters
Dur
A duration object.
Tp
A time_point object.
Remarks
The first constructor constructs an object whose stored duration value is equal to duration::zero.
The second constructor constructs an object whose stored duration value is equal to Dur. Unless is_convertible<Duration2, duration>holds true, the second constructor does not participate in overload resolution. For more information, see <type_traits>.
The third constructor initializes its duration value by using Tp.time_since_epoch().
time_point::time_since_epoch Method
Retrieves the stored duration value.
constexpr duration time_since_epoch() const;