tmp/tmp7ibhirfu/{from.md → to.md}
RENAMED
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| 1 |
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## The default allocator <a id="depr.default.allocator">[[depr.default.allocator]]</a>
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The following members and explicit class template specialization are
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defined in addition to those specified in [[default.allocator]]:
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``` cpp
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namespace std {
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// specialize for void:
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template <> class allocator<void> {
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public:
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using value_type = void;
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using pointer = void*;
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using const_pointer = const void*;
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// reference-to-void members are impossible.
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template <class U> struct rebind { using other = allocator<U>; };
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};
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template <class T> class allocator {
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public:
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using size_type = size_t;
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using difference_type = ptrdiff_t;
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using pointer = T*;
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using const_pointer = const T*;
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using reference = T&;
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using const_reference = const T&;
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template <class U> struct rebind { using other = allocator<U>; };
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T* address(T& x) const noexcept;
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const T* address(const T& x) const noexcept;
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T* allocate(size_t n, const void* hint);
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template<class U, class... Args>
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void construct(U* p, Args&&... args);
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template <class U>
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void destroy(U* p);
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size_t max_size() const noexcept;
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};
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}
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```
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``` cpp
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T* address(T& x) const noexcept;
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const T* address(const T& x) const noexcept;
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```
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*Returns:* `addressof(x)`.
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``` cpp
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T* allocate(size_t n, const void* hint);
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```
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*Returns:* A pointer to the initial element of an array of storage of
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size `n` `* sizeof(T)`, aligned appropriately for objects of type `T`.
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It is *implementation-defined* whether over-aligned types are
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supported ([[basic.align]]).
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*Remarks:* The storage is obtained by calling
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`::operator new(std::size_t)` ([[new.delete]]), but it is unspecified
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when or how often this function is called.
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*Throws:* `bad_alloc` if the storage cannot be obtained.
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``` cpp
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template <class U, class... Args>
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void construct(U* p, Args&&... args);
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```
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*Effects:* As if by: `::new((void *)p) U(std::forward<Args>(args)...);`
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``` cpp
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template <class U>
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void destroy(U* p);
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```
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*Effects:* As if by `p->~U()`.
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``` cpp
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size_t max_size() const noexcept;
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```
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*Returns:* The largest value *N* for which the call `allocate(N, 0)`
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might succeed.
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