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std::literals::chrono_literals(3) Library Functions Manual std::literals::chrono_literals(3)

NAME

std::literals::chrono_literals

SYNOPSIS

Functions


template<char... _Digits> constexpr chrono::hours operator''h ()
Literal suffix for durations of type std::chrono::hours constexpr chrono::duration< long double, ratio< 3600, 1 > > operator''h (long double __hours)
Literal suffix for durations representing non-integer hours. template<char... _Digits> constexpr chrono::minutes operator''min ()
Literal suffix for durations of type std::chrono::minutes constexpr chrono::duration< long double, ratio< 60, 1 > > operator''min (long double __mins)
Literal suffix for durations representing non-integer minutes. template<char... _Digits> constexpr chrono::milliseconds operator''ms ()
Literal suffix for durations of type std::chrono::milliseconds constexpr chrono::duration< long double, milli > operator''ms (long double __msecs)
Literal suffix for durations representing non-integer milliseconds. template<char... _Digits> constexpr chrono::nanoseconds operator''ns ()
Literal suffix for durations of type std::chrono::nanoseconds constexpr chrono::duration< long double, nano > operator''ns (long double __nsecs)
Literal suffix for durations representing non-integer nanoseconds. template<char... _Digits> constexpr chrono::seconds operator''s ()
Literal suffix for durations of type std::chrono::seconds constexpr chrono::duration< long double > operator''s (long double __secs)
Literal suffix for durations representing non-integer seconds. template<char... _Digits> constexpr chrono::microseconds operator''us ()
Literal suffix for durations of type std::chrono::microseconds constexpr chrono::duration< long double, micro > operator''us (long double __usecs)
Literal suffix for durations representing non-integer microseconds.

Detailed Description

ISO C++ 2014 namespace for suffixes for duration literals.

These suffixes can be used to create chrono::duration values with tick periods of hours, minutes, seconds, milliseconds, microseconds or nanoseconds. For example, std::chrono::seconds(5) can be written as 5s after making the suffix visible in the current scope. The suffixes can be made visible by a using-directive or using-declaration such as:

  • using namespace std::chrono_literals;
  • using namespace std::literals;
  • using namespace std::chrono;
  • using namespace std;
  • using std::chrono_literals::operator''s;

The result of these suffixes on an integer literal is one of the standard typedefs such as std::chrono::hours. The result on a floating-point literal is a duration type with the specified tick period and an unspecified floating-point representation, for example 1.5e2ms might be equivalent to chrono::duration<long double, chrono::milli>(1.5e2).

Author

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Mon Dec 18 2023 libstdc++