FreeBSD Manual Pages
std::is_rvalue_reference(3) C++ Standard Libary std::is_rvalue_reference(3) NAME std::is_rvalue_reference - std::is_rvalue_reference Synopsis Defined in header <type_traits> template< class T > (since C++11) struct is_rvalue_reference; Checks whether T is an rvalue reference type. Provides the member constant value which is equal to true, if T is an rvalue reference type. Otherwise, value is equal to false. The behavior of a program that adds specializations for is_rvalue_reference or is_rvalue_reference_v (since C++17) is undefined. Template parameters T - a type to check Helper variable template template< class T > inline constexpr bool is_rvalue_reference_v = (since C++17) is_rvalue_reference<T>::value; Inherited from std::integral_constant Member constants value true if T is an rvalue reference type , false otherwise [static] (public static member constant) Member functions operator bool converts the object to bool, returns value (public member function) operator() returns value (C++14) (public member function) Member types Type Definition value_type bool type std::integral_constant<bool, value> Possible implementation template <class T> struct is_rvalue_reference : std::false_type {}; template <class T> struct is_rvalue_reference<T&&> : std::true_type {}; Example // Run this code #include <type_traits> class A {}; int main() { static_assert( not std::is_rvalue_reference_v<A> ); static_assert( not std::is_rvalue_reference_v<A&> ); static_assert( std::is_rvalue_reference_v<A&&> ); static_assert( not std::is_rvalue_reference_v<int> ); static_assert( not std::is_rvalue_reference_v<int&> ); static_assert( std::is_rvalue_reference_v<int&&> ); } See also is_lvalue_reference checks if a type is a lvalue reference (C++11) (class template) is_reference checks if a type is either a lvalue reference or rvalue (C++11) reference (class template) http://cppreference.com 2022.07.31 std::is_rvalue_reference(3)
NAME | Synopsis | Template parameters | Member constants | Member functions | Member types | Possible implementation | Example | See also
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::is_rvalue_reference&sektion=3&manpath=FreeBSD+Ports+15.0>