std::ranges::iterator_t, std::ranges::const_iterator_t, std::ranges::sentinel_t, std::ranges::const_sentinel_t, std::ranges::range_size_t, std::ranges::range_difference_t, std::ranges::range_value_t, std::ranges::range_reference_t

 

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

 

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

 

Defined in header <ranges>
template< class T > using iterator_t = decltype(ranges::begin(std::declval<T&>()));	(1)	(since C++20)
template< ranges::range R > using const_iterator_t = std::const_iterator<ranges::iterator_t<R>>;	(2)	(since C++23)
template< ranges::range R > using sentinel_t = decltype(ranges::end(std::declval<R&>()));	(3)	(since C++20)
template< ranges::range R > using const_sentinel_t = std::const_sentinel<ranges::sentinel_t<R>>;	(4)	(since C++23)
template< ranges::sized_range R > using range_size_t = decltype(ranges::size(std::declval<R&>()));	(5)	(since C++20)
template< ranges::range R > using range_difference_t = std::iter_difference_t<ranges::iterator_t<R>>;	(6)	(since C++20)
template< ranges::range R > using range_value_t = std::iter_value_t<ranges::iterator_t<R>>;	(7)	(since C++20)
template< ranges::range R > using range_reference_t = std::iter_reference_t<ranges::iterator_t<R>>;	(8)	(since C++20)
template< ranges::range R > using range_const_reference_t =     std::iter_const_reference_t<ranges::iterator_t<R>>;	(9)	(since C++23)
template< ranges::range R > using range_rvalue_reference_t =     std::iter_rvalue_reference_t<ranges::iterator_t<R>>;	(10)	(since C++20)
template< ranges::range R > using range_common_reference_t =     std::iter_common_reference_t<ranges::iterator_t<R>>;	(11)	(since C++20)

1) Used to obtain the iterator type of the type T.

2) Used to obtain the constant iterator type of the range type R.

3) Used to obtain the sentinel type of the range type R.

4) Used to obtain the constant sentinel type of the range type R.

5) Used to obtain the size type of the sized_range type R.

6) Used to obtain the difference type of the iterator type of range type R.

7) Used to obtain the value type of the iterator type of range type R.

8) Used to obtain the reference type of the iterator type of range type R.

9) Used to obtain the const_reference type of the iterator type of range type R.

10) Used to obtain the rvalue_reference type of the iterator type of range type R.

11) Used to obtain the common_reference type of the iterator type of range type R.

Template parameters

T	-	a type that can be used in std::ranges::begin
R	-	a range type or a sized_range type

Notes

iterator_t can be applied to non-range types, e.g. arrays with unknown bound.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 3860	C++20	range_common_reference_t was missing	added

See also

iter_value_titer_reference_titer_const_reference_titer_difference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++23)(C++20)(C++20)(C++20)

computes the associated types of an iterator (alias template)