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std::literals::chrono_literals::operator""y(3) | C++ Standard Libary | std::literals::chrono_literals::operator""y(3) |
NAME¶
std::literals::chrono_literals::operator""y - std::literals::chrono_literals::operator""y
Synopsis¶
Defined in header <chrono>
constexpr std::chrono::year operator ""y( unsigned long long y )
(1) (since C++20)
noexcept;
Forms a std::chrono::year literal representing a year in the proleptic
Gregorian
calendar.
Parameters¶
y - the year value
Return value¶
A std::chrono::year initialized from int(y). If y is not in the
range [-32767,
32767], the stored value is unspecified.
Possible implementation¶
constexpr std::chrono::year operator ""y(unsigned long
long y) noexcept
{
return std::chrono::year(static_cast<int>(y));
}
Notes¶
This operator is declared in the namespace
std::literals::chrono_literals, where
both literals and chrono_literals are inline namespaces. Access to this
operator can
be gained with using namespace std::literals, using namespace
std::chrono_literals,
and using namespace std::literals::chrono_literals.
In addition, within the namespace std::chrono, the directive using namespace
literals::chrono_literals; is provided by the standard library, so that if a
programmer uses using namespace std::chrono; to gain access to the classes in
the
chrono library, the corresponding literal operators become visible as
well.
Example¶
// Run this code
#include <iostream>
#include <chrono>
int main()
{
using namespace std::literals;
std::cout
<< int(2020y) << ' '
<< int(-220y) << ' '
<< int(3000y) << ' '
<< int(32768y) << ' ' // unspecified
<< int(65578y) << '\n'; // unspecified
}
Possible output:¶
2020 -220 3000 -32768 42
See also¶
constructor constructs a year
(public member function of std::chrono::year)
2022.07.31 | http://cppreference.com |