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

~inout_ptr_t();		(since C++23)

Resets the adapted Smart object by the value of modified Pointer object (or the void* object if operator void**() has been called) and the captured arguments. release() may be called on the adapted Smart

Let

• s denotes the adapted Smart object,
• args... denotes the captured arguments,
• p denotes the value of stored Pointer, or static_cast <Pointer> ( *operator void ** ( ) ) if operator void**
• SP be
  • Smart::pointer, if it is valid and denotes a type, otherwise,
  • Smart::element_type*, if Smart::element_type
  • std::pointer_traits <Smart> :: element_type * , if std::pointer_traits <Smart> :: element_type
  • Pointer,
• /*do-release*/ denotes s.release() if the constructor does not call release()

If Smart is a pointer type, the destructor performs

s = static_cast <Smart> (p) ; , and the program is ill-formed if sizeof...(Args) > 0

otherwise, if s.reset ( static_cast <SP> (p), std::forward <Args> (args)...)

/*do-release*/ ; if (p) { s.reset ( static_cast <SP> (p), std::forward <Args> (args)...) ; }

otherwise, if std::is_constructible_v<Smart, SP, Args...> is true

/*do-release*/ ; if (p) { s = Smart( static_cast <SP> (p), std::forward <Args> (args)...) ; }

otherwise, the program is ill-formed.

Notes

The implementation may allocate the storage for the data structure needed for Smart (e.g. a control block) on construction, in order to leave non-throwing works to the destructor.

Arguments captured by value are destroyed after resetting.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 3897	C++23	the destructor did not update a raw pointer to the null value	it does