Expression | Return type | Operational semantics | |

C1::rep | An arithmetic type or a class emulating an arithmetic type | The representation type of C1::duration. | |

C1::period | a specialization of ratio | The tick period of the clock in seconds. | |

C1::duration | chrono::duration<C1::rep, C1::period> | The duration type of the clock. | |

C1::time_point | chrono::time_point<C1> or chrono::time_point<C2, C1::duration> | ||

C1::is_steady | const bool | ||

C1::now() | C1::time_point | Returns a time_point object representing the current point in time. |