std::inout_ptr
Defined in header <memory>.
template< class Pointer = void, class Smart, class... Args >
auto inout_ptr( Smart& s, Args&&... args );
Returns an inout_ptr_t with deduced template arguments that captures arguments for resetting by reference.
The program is ill-formed if construction of the return value (see below) 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, ifPointeris not same asvoid,- otherwise,
Smart::pointer, if it is valid and denotes a type, - otherwise,
Smart::element_type*, ifSmart::element_typeis 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.
| Feature-test macro | Value | Std |
|---|---|---|
| __cpp_lib_inout_ptr | 202106L | (C++23) |