std::generator<Ref,V,Allocator>::iterator

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Technical specifications

Symbols index

External libraries

 

Utilities library

Language support Type support (basic types, RTTI) Library feature-test macros (C++20) Dynamic memory management Program utilities Coroutine support (C++20) Variadic functions is_constant_evaluated (C++20) is_within_lifetime (C++26) initializer_list (C++11) source_location (C++20) Three-way comparison (C++20) three_way_comparablethree_way_comparable_with (C++20)(C++20) strong_ordering (C++20) weak_ordering (C++20) partial_ordering (C++20) common_comparison_category (C++20) compare_three_way_result (C++20) compare_three_way (C++20) strong_order (C++20) weak_order (C++20) partial_order (C++20) compare_strong_order_fallback (C++20) compare_weak_order_fallback (C++20) compare_partial_order_fallback (C++20)    is_eqis_neqis_ltis_lteqis_gtis_gteq (C++20)(C++20)(C++20)(C++20)(C++20)(C++20)

General utilities Date and time Function objects Formatting library (C++20) bitset hash (C++11) Relational operators (deprecated in C++20) rel_ops::operator!=rel_ops::operator> rel_ops::operator<=rel_ops::operator>= Integer comparison functions cmp_equalcmp_lesscmp_less_than (C++20)(C++20)(C++20)    cmp_not_equalcmp_greatercmp_greater_than (C++20)(C++20)(C++20) in_range (C++20) Swap and type operations swap ranges::swap (C++20) exchange (C++14) declval (C++11) to_underlying (C++23) forward (C++11) forward_like (C++23) move (C++11) move_if_noexcept (C++11) as_const (C++17) Common vocabulary types pair tuple (C++11) optional (C++17) any (C++17) variant (C++17) tuple_size (C++11) tuple_element (C++11) apply (C++17) make_from_tuple (C++17) expected (C++23) Elementary string conversions to_chars (C++17) from_chars (C++17) chars_format (C++17)

 

Coroutine support

Coroutine traits

coroutine_traits (C++20)

Coroutine handle

coroutine_handle (C++20)

No-op coroutines

noop_coroutine_promise (C++20)

noop_coroutine (C++20)

Trivial awaitables

suspend_never (C++20)

suspend_always (C++20)

Range generators

generator (C++23)

 

Ranges library

Range access
begin cbegin end cend	rbegin crbegin rend crend	size ssize data cdata	empty
Range conversions
to (C++23)
Range primitives
range_size_trange_difference_trange_value_trange_reference_t	iterator_tconst_iterator_tsentinel_tconst_sentinel_t (C++23)(C++23)	range_const_reference_trange_rvalue_reference_trange_common_reference_t (C++23)	elements_of (C++23)
Dangling iterator handling
dangling	borrowed_iterator_t	borrowed_subrange_t
Range concepts
range borrowed_range sized_range constant_range (C++23)	common_range view viewable_range	input_range output_range forward_range	bidirectional_range random_access_range contiguous_range
Views
view_interface	subrange
Range factories
empty_viewviews::empty single_viewviews::single	iota_viewviews::iota repeat_viewviews::repeat (C++23)(C++23)	basic_istream_viewviews::istream
Range adaptors
views::all_tviews::all ref_view owning_view as_rvalue_viewviews::as_rvalue (C++23)(C++23) filter_viewviews::filter transform_viewviews::transform take_viewviews::take take_while_viewviews::take_while	drop_viewviews::drop drop_while_viewviews::drop_while join_viewviews::join join_with_viewviews::join_with (C++23)(C++23) lazy_split_viewviews::lazy_split split_viewviews::split views::counted common_viewviews::common	reverse_viewviews::reverse as_const_viewviews::as_const (C++23)(C++23) elements_viewviews::elements keys_viewviews::keys values_viewviews::values enumerate_viewviews::enumerate (C++23)(C++23) zip_viewviews::zip (C++23)(C++23) zip_transform_viewviews::zip_transform (C++23)(C++23)	adjacent_viewviews::adjacent (C++23)(C++23) views::pairwise (C++23) adjacent_transform_viewviews::adjacent_transform (C++23)(C++23) views::pairwise_transform (C++23) chunk_viewviews::chunk (C++23)(C++23) slide_viewviews::slide (C++23)(C++23) chunk_by_viewviews::chunk_by (C++23)(C++23) stride_viewviews::stride (C++23)(C++23) cartesian_product_viewviews::cartesian_product (C++23)(C++23)
Range generators
std::generator (C++23)
Range adaptor objects
Range adaptor closure objects
range_adaptor_closure (C++23)
Helper items
copyable-box movable-box (until C++23)(C++23)	simple-view non-propagating-cache

 

std::generator

Member functions

generator::generator (C++23)

generator::~generator (C++23)

generator::operator= (C++23)

generator::begin (C++23)

generator::end (C++23)

promise_type

generator::promise_type::promise_type (C++23)

generator::promise_type::get_return_object (C++23)

generator::promise_type::initial_suspend (C++23)

generator::promise_type::final_suspend (C++23)

generator::promise_type::yield_value (C++23)

generator::promise_type::await_transform (C++23)

generator::promise_type::return_void (C++23)

generator::promise_type::unhandled_exception (C++23)

generator::promise_type::operator new (C++23)

generator::promise_type::operator delete (C++23)

Iterator

generator::iterator::iterator (C++23)

generator::iterator::operator= (C++23)

generator::iterator::operator* (C++23)

generator::iterator::operator++ generator::iterator::operator++(int) (C++23)(C++23)

operator==(generator::iterator, std::default_sentinel_t) (C++23)

 

class /*iterator*/;		(since C++23)

The return type of generator::begin. The name iterator is for exposition purposes only.

Models indirectly_readable and input_iterator.

Member types

Member type	Definition
value_type	std::generator::value
difference_type	std::ptrdiff_t

Data members

Typical implementations of iterator hold only one non-static data members:

• a coroutine handle of type std::coroutine_handle<std::generator::promise_type> (shown here as coroutine_ for exposition only).

Member functions

(constructor) (C++23)	constructs an iterator (public member function)
operator= (C++23)	assigns another iterator (public member function)
operator* (C++23)	returns an underlying value (public member function)
operator++operator++(int) (C++23)	advances the iterator (public member function)

std::generator::iterator::iterator

/*iterator*/( /*iterator*/&& other ) noexcept;		(since C++23)

Initializes coroutine_ with std::exchange(other.coroutine_, {});.

std::generator::iterator::operator=

/*iterator*/& operator=( /*iterator*/&& other ) noexcept;		(since C++23)

Equivalent to coroutine_ = std::exchange(other.coroutine_, {});.

Returns: *this.

std::generator::iterator::operator*

reference operator*() const     noexcept( std::is_nothrow_copy_constructible_v<reference> );		(since C++23)

1. Let reference be the std::generator's underlying type.
2. Let for some generator object x its coroutine_ be in the stack *x.active_.
3. Let x.active_->top() refer to a suspended coroutine with promise object p.

Equivalent to return static_cast<reference>(*p.value_);.

std::generator::iterator::operator++

constexpr /*iterator*/& operator++();	(1)	(since C++23)
constexpr void operator++( int );	(2)	(since C++23)

1) Let for some generator object x the coroutine_ be in the stack *x.active_.

Equivalent to x.active_->top().resume().

Returns: *this.

2) Equivalent to ++*this;.

Non-member functions

operator== (C++23)

compares the underlying iterator with a sentinel (function)

operator==(std::generator::iterator)

friend bool operator==( const /*iterator*/& i, std::default_sentinel_t );		(since C++23)

Equivalent to return i.coroutine_.done();.

The != operator is synthesized from operator==.

This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::generator::iterator is an associated class of the arguments.