std::ranges::basic_istream_view::iterator
struct /*iterator*/; |
(since C++20) |
The return type of basic_istream_view::begin. The name /*iterator*/ shown here is exposition only.
/*iterator*/ is an input_iterator, but does not satisfy LegacyInputIterator, and thus does not work with pre-C++20 algorithms.
Member types
| Member type | Definition |
|---|---|
iterator_concept(C++20) |
std::input_iterator_tag |
difference_type(C++20) |
std::ptrdiff_t |
value_type(C++20) |
Val |
Member functions
|
(constructor)
(C++20)
|
constructs an iterator (public member function) |
|
operator=
(C++20)
|
the copy assignment operator is deleted; /*iterator*/ is move-only (public member function) |
|
operator++
(C++20)
|
advances the iterator (public member function) |
|
operator*
(C++20)
|
returns the current element (public member function) |
std::ranges::basic_istream_view::iterator::iterator
constexpr explicit /*iterator*/( basic_istream_view& parent ); |
(1) | (since C++20) |
/*iterator*/( const /*iterator*/& ) = delete; |
(2) | (since C++20) |
/*iterator*/( /*iterator*/&& ) = default; |
(3) | (since C++20) |
basic_istream_view.
std::ranges::basic_istream_view::iterator::operator=
/*iterator*/& operator=( const /*iterator*/& ) = delete; |
(1) | (since C++20) |
/*iterator*/& operator=( /*iterator*/&& ) = default; |
(2) | (since C++20) |
std::ranges::basic_istream_view::iterator::operator++
/*iterator*/& operator++(); |
(1) | (since C++20) |
void operator++(int); |
(2) | (since C++20) |
Reads a value from the underlying stream and stores it into the parent basic_istream_view.
Return value
*this
std::ranges::basic_istream_view::iterator::operator*
Val& operator*() const; |
(since C++20) |
Returns a reference to the stored value.
Non-member functions
|
operator==
(C++20)
|
compares with a std::default_sentinel_t (public member function) |
operator==(std::ranges::basic_istream_view::iterator, std::default_sentinel)
friend bool operator==( const /*iterator*/& x, std::default_sentinel_t ); |
(since C++20) |
Compares an iterator with std::default_sentinel_t.
Returns true if *this does not have a parent basic_istream_view, or if an error has occurred on the underlying stream.
This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::ranges::basic_istream_view::iterator is an associated class of the arguments.
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| P2325R3 | C++20 | default constructor was provided as C++20 iterators must be default_initializable |
removed along with the requirement |
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