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

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Utilities library
General utilities
Relational operators (deprecated in C++20)
Dynamic memory management
Uninitialized memory algorithms
Constrained uninitialized memory algorithms
Allocators
Garbage collection support
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)



explicit inout_ptr_t ( Smart & sp, Args... args ) ;
(1) (since C++23)
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

Return value

(none)

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