std::allocator_arg_t (3) - Linux Manuals

std::allocator_arg_t: std::allocator_arg_t


std::allocator_arg_t - std::allocator_arg_t


Defined in header <memory>
struct allocator_arg_t {}; (since C++11)
                                                                   (until C++17)
struct allocator_arg_t { explicit allocator_arg_t() = default; }; (since C++17)

std::allocator_arg_t is an empty class type used to disambiguate the overloads of constructors and member functions of allocator-aware objects, including std::tuple,
std::function, std::packaged_task,
(until C++17)and std::promise.

See also

allocator_arg an object of type std::allocator_arg_t used to select allocator-aware constructors

uses_allocator checks if the specified type supports uses-allocator construction
               (class template)