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.