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std::uses_allocator(3) C++ Standard Libary std::uses_allocator(3) NAME std::uses_allocator - std::uses_allocator Synopsis Defined in header <functional> template< class R, class... ArgTypes, class Alloc > (since C++11) struct uses_allocator<std::function<R(ArgTypes...)>, Alloc> : (until C++17) std::true_type { }; This specialization of std::uses_allocator informs other library components that all objects of type std::function support uses-allocator construction, even though they do not have a nested allocator_type. Notes std::function's allocator support was poorly specified and inconsis- tently implemented. Some implementations do not support uses-allocator con- struction at all, some provide the needed constructor overloads but ignore the sup- plied allocator argument, and some provide the overloads and use the supplied allo- cator for construction but not when the std::function is reassigned. As a re- sult, allocator support was removed in C++17. Inherited from std::integral_constant Member constants value true [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> See also uses_allocator checks if the specified type supports uses-allocator construction (C++11) (class template) http://cppreference.com 2022.07.31 std::uses_allocator(3)
NAME | Synopsis | Notes | Member constants | Member functions | Member types | See also
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