std::experi...ardIterator(3) C++ Standard Libary std::experi...ardIterator(3) NAME std::experimental::ranges::ForwardIterator - std::experimen- tal::ranges::ForwardIterator Synopsis Defined in header <experimental/ranges/iterator> template< class I > concept bool ForwardIterator = InputIterator<I> && DerivedFrom<ranges::iterator_category_t<I>, (ranges TS) ranges::forward_iterator_tag> && Incrementable<I> && Sentinel<I, I>; The concept ForwardIterator<I> refines InputIterator by adding equality comparison and the multi-pass guarantee. The domain of == for forward iterators is that of iterators over the same underlying sequence, except that value-initialized iterators of the same type may be compared with each other and shall compare equal. Pointers and references obtained from a forward iterator into a range [i, s) must remain valid while [i, s) continues to denote a range. Let a and b be two dereferenceable iterators of type I. ForwardItera- tor<I> is satisfied only if: * a == b implies ++a == ++b; and * The expression ([](X x){ ++x; }(a), *a) is equivalent to *a, i.e., incrementing a copy of a has no effect on the result of dereferencing a. This is known as the multi-pass guarantee. Notes A forward iterator cannot be "stashing": it cannot return a reference to an object within itself, because such references would be invalidated by the de- struction of the forward iterator. http://cppreference.com 2024.06.10 std::experi...ardIterator(3)
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