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

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< cpp‎ | experimental‎ | ranges

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

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.

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