std::pmr::polymorphic_allocator< _Tp > - Class template polymorphic_allocator.

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                                                    libstdc++       std::pmr::polymorphic_allocator<_Tp>(3cxx)

template<typename_Tp>
       class std::pmr::polymorphic_allocator< _Tp >"Class template polymorphic_allocator.

       Since
           C++17

       std::pmr::polymorphic_allocator< _Tp > - Class template polymorphic_allocator.

       #include <memory_resource>

   PublicTypesusingvalue_type = _Tp

   PublicMemberFunctionspolymorphic_allocator (const polymorphic_allocator &__other)=default
       template<typename _Up > polymorphic_allocator (const polymorphic_allocator< _Up > &__x) noexcept
       polymorphic_allocator (memory_resource *__r) noexcept
       _Tp * allocate (size_t __n)
       void * allocate_bytes (size_t __nbytes, size_t __alignment=alignof(max_align_t))
       template<typename _Up > _Up * allocate_object (size_t __n=1)
       template<typename_Tp1 , typename... _Args> voidconstruct (_Tp1 *__p, _Args &&... __args)
       voiddeallocate (_Tp *__p, size_t __n) noexcept
       voiddeallocate_bytes (void *__p, size_t __nbytes, size_t __alignment=alignof(max_align_t))
       template<typename _Up > voiddeallocate_object (_Up *__p, size_t __n=1)
       template<typename _Up > voiddelete_object (_Up *__p)
       template<typename _Up > voiddestroy (_Up *__p)
       template<typename _Up , typename... _CtorArgs> _Up * new_object (_CtorArgs &&... __ctor_args)
       polymorphic_allocator & operator= (const polymorphic_allocator &)=deletememory_resource * resource () const noexcept
       polymorphic_allocatorselect_on_container_copy_construction () const noexcept

   Friends
       bool operator== (const polymorphic_allocator &__a, const polymorphic_allocator &__b) noexcept