tmp/tmp6o269e6r/{from.md → to.md}
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| 1 |
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## Temporary buffers <a id="depr.temporary.buffer">[[depr.temporary.buffer]]</a>
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The header `<memory>` has the following additions:
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``` cpp
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namespace std {
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template <class T>
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pair<T*, ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept;
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template <class T>
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void return_temporary_buffer(T* p);
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}
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```
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``` cpp
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template <class T>
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pair<T*, ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept;
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```
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*Effects:* Obtains a pointer to uninitialized, contiguous storage for N
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adjacent objects of type `T`, for some non-negative number N. It is
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*implementation-defined* whether over-aligned types are
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supported ([[basic.align]]).
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*Remarks:* Calling `get_temporary_buffer` with a positive number `n` is
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a non-binding request to return storage for `n` objects of type `T`. In
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this case, an implementation is permitted to return instead storage for
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a non-negative number N of such objects, where N` != n` (including
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N` == 0`).
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[*Note 1*: The request is non-binding to allow latitude for
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implementation-specific optimizations of its memory
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management. — *end note*]
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*Returns:* If `n <= 0` or if no storage could be obtained, returns a
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pair `P` such that `P.first` is a null pointer value and
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`P.second == 0`; otherwise returns a pair `P` such that `P.first` refers
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to the address of the uninitialized storage and `P.second` refers to its
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capacity N (in the units of `sizeof(T)`).
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``` cpp
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template <class T> void return_temporary_buffer(T* p);
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```
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*Effects:* Deallocates the storage referenced by `p`.
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*Requires:* `p` shall be a pointer value returned by an earlier call to
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`get_temporary_buffer` that has not been invalidated by an intervening
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call to `return_temporary_buffer(T*)`.
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*Throws:* Nothing.
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