std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t (3) - Linux Man Pages

std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t: std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t

NAME

std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t - std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t

Synopsis


Defined in header <experimental/ranges/iterator>
template <CopyConstructible T>
class dangling {
public:
dangling() requires DefaultConstructible<T>(); (ranges TS)
dangling(T t);
T get_unsafe() const;
};
template<Range R>
using safe_iterator_t = std::conditional_t<std::is_lvalue_reference<R>::value, (ranges TS)
ranges::iterator_t<R>,
ranges::dangling<ranges::iterator_t<R>>;


The class template dangling is a simple wrapper around an object to indicate that the wrapped object may be dangling, that is, it refers to another object whose lifetime may have ended.
The alias template safe_iterator_t returns the iterator type of R, wrapped in dangling if the range was an rvalue range (as indicated by R not being an lvalue reference type).
They are used by range algorithms that accept rvalue ranges and return iterators into them.

Member functions


 std::experimental::ranges::dangling::dangling


dangling() requires DefaultConstructible<T>(); (1)
dangling(T t); (2)


1) Default constructor. Value-initializes the wrapped object.
2) Initializes the wrapped object with t. Note that this constructor defines an implicit conversion from T to dangling<T>.


 std::experimental::ranges::dangling::get_unsafe


T get_unsafe() const;


Returns a copy of the wrapped object.