using resource_adaptor = /*resource-adaptor-imp*/<
typename std::allocator_traits<Alloc>::
template< class Alloc >
class /*resource-adaptor-imp*/ : public memory_resource; // for exposition only
The alias template resource_adaptor adapts the allocator type Alloc with a memory_resource interface. The allocator is rebound to a char value type before it is actually adapted (using the resource-adaptor-imp class template), so that adapting specializations of the same allocator template always yields the same type, regardless of the value type the allocator template is originally instantiated with.
resource_adaptor is defined in namespace std::experimental::pmr, and the base type memory_resorce in this page is std::experimental::pmr::memory_resource.
resource_adaptor is defined in namespace std::pmr::experimental, and the base type memory_resorce in this page is std::pmr::memory_resource.
resource-adaptor-imp is a class template whose members are described below. The name resource-adaptor-imp is for exposition purposes only and not normative.
In addition to meeting the Allocator requirements, Alloc must additionally satisfy the following requirements:
allocator_type Alloc [edit] Member functions of resource-adaptor-imp resource-adaptor-imp::resource-adaptor-imp
/*resource-adaptor-imp*/() = default;
(1) (library fundamentals TS)/*resource-adaptor-imp*/(const /*resource-adaptor-imp*/& other)
= default;
/*resource-adaptor-imp*/(/*resource-adaptor-imp*/&& other)
= default;
explicit /*resource-adaptor-imp*/(const Alloc& a2);
(4) (library fundamentals TS)explicit /*resource-adaptor-imp*/(Alloc&& a2);
(5) (library fundamentals TS)1) Default constructor. Default constructs the wrapped allocator.
2) Copy constructor. Copy constructs the wrapped allocator from the allocator wrapped by other.
3) Move constructor. Move constructs the wrapped allocator from the allocator wrapped by other.
4) Initializes the wrapped allocator with a2.
5) Initializes the wrapped allocator with std::move(a2).
Parameters other - anotherresource-adaptor-imp object to copy or move from a2 - another Alloc object to copy or move from resource-adaptor-imp::get_allocator
allocator_type get_allocator() const;
(library fundamentals TS)Returns a copy of the wrapped allocator.
resource-adaptor-imp::operator=/*resource-adaptor-imp*/& operator=(const /*resource-adaptor-imp*/& other)
= default;
Defaulted copy assignment operator. Copy assigns the wrapped allocator from that of other.
Allocates memory using the allocate member function of the wrapped allocator.
Deallocates the storage pointed to by p using the deallocate member function of the wrapped allocator.
p must have been allocated using the allocate member function of an allocator that compares equal to the wrapped allocator, and must not have been subsequently deallocated.
protected:
virtual bool do_is_equal(const memory_resource& other) const noexcept;
Let p be dynamic_cast<const /*resource-adaptor-imp*/*>(&other). If p is a null pointer value, returns false. Otherwise, return the result of comparing the allocators wrapped by *p and *this using operator==.
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