FreeBSD Manual Pages
std::experi...es::identity(3) C++ Standard Libarystd::experi...es::identity(3) NAME std::experimental::ranges::identity - std::experimental::ranges::iden- tity Synopsis Defined in header <experimental/ranges/functional> struct identity; (ranges TS) ranges::identity is a function object type whose operator() returns its argument unchanged. It is used as the default projection for all Ranges TS algorithms. Member types Member type Definition is_transparent /* unspecified */ Member functions operator() returns the argument unchanged (public member function) std::experimental::ranges::identity::operator() template< class T> constexpr T&& operator()( T&& t ) const noexcept; Returns std::forward<T>(t). Parameters t - argument to return Return value std::forward<T>(t). Notes The member type is_transparent indicates to the caller that this function object is a transparent function object: it accepts arguments of arbitrary types and uses perfect forwarding, which avoids unnecessary copying and conversion when the function object is used in heterogeneous context, or with rvalue ar- guments. In particular, template functions such as std::set::find and std::set::lower_bound make use of this member type on their Compare types. Example This section is incomplete Reason: no example http://cppreference.com 2022.07.31 std::experi...es::identity(3)
NAME | Synopsis | Member types | Member functions | Parameters | Return value | Notes | Example
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=std::experimental::ranges::identity&sektion=3&manpath=FreeBSD+Ports+15.0>