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There are seven constructors for unique_ptr.
unique_ptr();
unique_ptr(nullptr_t);
explicit unique_ptr(
pointer _Ptr
);
unique_ptr(
Type *_Ptr,
typename conditional<
is_reference<Del>::value,
Del,
typename add_reference<const Del>::type>::type _Deleter
);
unique_ptr(
pointer ptr,
typename remove_reference<Del>::type&& _Deleter
);
unique_ptr(
unique_ptr&& _Right
);
template<class Ty2, Class Del2>
unique_ptr(
unique_ptr<Ty2, Del2>&& _Right
);
Parameters
Parameter |
Description |
|---|---|
_Ptr |
A pointer to the resource to be assigned to a unique_ptr. |
_Deleter |
A deleter to be assigned to a unique_ptr. |
_Right |
An rvalue reference to a unique_ptr from which unique_ptr fields are move assigned to the newly constructed unique_ptr. |
Remarks
The first two constructors construct an object that manages no resource. The third constructor stores ptr in stored_ptr. The fourth constructor stores ptr in stored_ptr and deleter in stored_deleter.
The fifth constructor stores ptr in stored_ptr and moves deleter into stored_deleter. The sixth and seventh constructors store right.reset() in stored_ptr and moves right.get_deleter() into stored_deleter.
Requirements
Header: <memory>
Namespace: std
See Also
Reference
Thread Safety in the Standard C++ Library