std::pmr::polymorphic_allocator::allocate(3)

NAME
std::pmr::polymorphic_allocator::allocate - std::pmr::polymorphic_allocator::allocate

Synopsis
   T* allocate( std::size_t n ); (since C++17)
                        (until C++20)
   [[nodiscard]] T* allocate( std::size_t n ); (since C++20)
   Allocates storage for n objects of type T using the underlying memory resource.
   Equivalent to return static_cast<T*>(resource()->allocate(n * sizeof(T),
   alignof(T)));.

Parameters
   n - the number of objects to allocate storage for

Return value
   A pointer to the allocated storage.

Exceptions
   Throws std::bad_array_new_length if n > std::numeric_limits<std::size_t>::max() /
   sizeof(T); may also throw any exceptions thrown by the call to resource()->allocate.
   Defect reports
   The following behavior-changing defect reports were applied retroactively to
   previously published C++ standards.
      DR Applied to Behavior as published Correct behavior
   LWG 3038 C++17 allocate might allocate storage of wrong throws length_error
                       size instead
   LWG 3237 C++17 the exception thrown by allocate was made consistent
                       inconsistent with std::allocator::allocate

See also
   allocate_bytes allocate raw aligned memory from the underlying resource
   (C++20) (public member function)
   allocate_object allocates raw memory suitable for an object or an array
   (C++20) (public member function)
   new_object allocates and constructs an object
   (C++20) (public member function)
   allocate allocates uninitialized storage using the allocator
   [static] (public static member function of std::allocator_traits<Alloc>)
   allocate allocates memory
                   (public member function of std::pmr::memory_resource)