std::input_...put_iterator(3) C++ Standard Libary std::input_...put_iterator(3) NAME std::input_or_output_iterator - std::input_or_output_iterator Synopsis Defined in header <iterator> template< class I > concept input_or_output_iterator = requires(I i) { (since C++20) { *i } -> /*can-reference*/; } && std::weakly_incrementable<I>; The input_or_output_iterator concept forms the basis of the iterator concept taxonomy; every iterator type satisfies the input_or_output_iterator re- quirements. The exposition-only concept /*can-reference*/ is satisfied if and only if the type is referenceable (in particular, not void). This section is incomplete Reason: Is *i required to be equality-preserving? Notes input_or_output_iterator itself only specifies operations for derefer- encing and incrementing an iterator. Most algorithms will require additional opera- tions, for example: * comparing iterators with sentinels (see sentinel_for); * reading values from an iterator (see indirectly_readable and in- put_iterator); * writing values to an iterator (see indirectly_writable and out- put_iterator); * a richer set of iterator movements (see forward_iterator, bidirectional_iterator, random_access_iterator). Unlike the LegacyIterator requirements, the input_or_output_iterator concept does not require copyability. Example A minimum iterator. #include <cstddef> #include <iterator> struct SimpleIterator { using difference_type = std::ptrdiff_t; int operator*(); SimpleIterator& operator++(); void operator++(int) { ++*this; } }; static_assert(std::input_or_output_iterator<SimpleIterator>); Category: * Todo with reason http://cppreference.com 2024.06.10 std::input_...put_iterator(3)
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