From cppreference.com
template<classPointer=void,classSmart,class...Args>autoinout_ptr(Smart&s,Args&&...args);(since C++23)
(constexpr since C++26)Returns an inout_ptr_t with deduced template arguments that captures arguments for resetting by reference.
If construction of the return value (see below) is ill-formed, the program is ill-formed.
Parameters
s - the object (typically a smart pointer) to adapt args - the arguments for resetting to capture Return value
std::inout_ptr_t<Smart,P,Args&&>(s,std::forward<Args>(args)...), where P is
Pointer, if Pointer is not same as void, otherwise,
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*.
Notes
Users may specify the template argument for the template parameter Pointer, in order to interoperate with foreign functions that take a Pointer*.
As all arguments for resetting are captured by reference, the returned inout_ptr_t should be a temporary object destroyed at the end of the full-expression containing the call to the foreign function, in order to avoid dangling references.
macro ValueStdFeature
(C++23)std::out_ptr, std::inout_ptr
(C++26)Freestanding std::out_ptr and std::inout_ptr
(C++26)Constexpr std::inout_ptrExample
See also