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std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t(3) | C++ Standard Libary | std::experimental::ranges::dangling,std::experimental::ranges::safe_iterator_t(3) |
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.
2024.06.10 | http://cppreference.com |