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 object if it is not called by the constructor.

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 ** has been called,
• SP be
  • Smart :: pointer , if it is valid and denotes a type, otherwise,
  • Smart :: element_type * , if Smart :: element_type is valid and denotes a type, otherwise,
  • std:: pointer_traits < Smart > :: element_type * , if std:: pointer_traits < Smart > :: element_type is valid and denotes a type, otherwise,
  • Pointer ,
• /*do-release*/ denotes s. release ( ) if the constructor does not call release ( ) , empty otherwise.

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 ) ... ) is well-formed, the destructor performs

/*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 , the destructor performs

/*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