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std::inout_ptr_t<Smart,Pointer,Args...>::inout_ptr_t

From cppreference.com
 
 
Memory management library
Allocators
Memory resources
Uninitialized storage (until C++20*)
Garbage collector support (until C++23)
 
 
explicit inout_ptr_t( Smart& sp, Args... args );
(1) (since C++23)
(constexpr since C++26)
inout_ptr_t( const inout_ptr_t& ) = delete;
(2) (since C++23)
1) Creates an inout_ptr_t.
  • Adapts sp as if binds it to the Smart& member, captures every argument t in args as if initializes the corresponding member of type T in Args with std::forward<T>(t).
  • Then initializes the stored Pointer with sp if Smart is a pointer type, otherwise, initializes it with sp.get().
sp.release() may be called if Smart is not a pointer type, in which case it will not be called again within the destructor.
2) Copy constructor is explicitly deleted. inout_ptr_t is neither copyable nor movable.

Parameters

sp - the object (typically a smart pointer) to adapt
args - the arguments used for resetting to capture

Exceptions

May throw implementation-defined exceptions.

Notes

If Smart is not a pointer type and sp.release() is not called by the constructor, it may be called by the destructor before resetting sp.

Every argument in args is moved into the created inout_ptr_t if it is of an object type, or transferred into the created inout_ptr_t as-is if it is of a reference type.

The constructor of inout_ptr_t is allowed to throw exceptions. For example, when sp is an intrusive pointer with a control block, the allocation for the new control block may be performed within the constructor rather than the destructor.

Example

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