std::ranges::iterator_t, std::ranges::sentinel_t, std::ranges::range_size_t, std::ranges::range_difference_t, std::ranges::range_value_t, std::ranges::range_reference_t, std::ranges::range_rvalue_reference_t

 

C++

Language

Standard Library Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

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)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Ranges library

Range access
begin cbegin end cend	rbegin crbegin rend crend	size ssize data cdata	empty
Range primitives
iterator_tsentinel_t	range_size_trange_difference_t	range_value_t	range_reference_trange_rvalue_reference_t
Dangling iterator handling
dangling	borrowed_iterator_t	borrowed_subrange_t
Range concepts
range borrowed_range sized_range	common_range view viewable_range	input_range output_range forward_range	bidirectional_range random_access_range contiguous_range
Views
view_interface	subrange
Semiregular wrapper
semiregular_box
Factories
empty_viewviews::empty	single_viewviews::single	iota_viewviews::iota	basic_istream_viewistream_view
Adaptors
views::all_tviews::all common_viewviews::common join_viewviews::join split_viewviews::split	take_viewviews::take drop_viewviews::drop take_while_viewviews::take_while drop_while_viewviews::drop_while	transform_viewviews::transform reverse_viewviews::reverse filter_viewviews::filter ref_view	views::counted elements_viewviews::elements keys_viewviews::keys values_viewviews::values

 

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 sentinel_t = decltype(ranges::end(std::declval<R&>()));	(2)	(since C++20)
template <ranges::sized_range R> using range_size_t = decltype(ranges::size(std::declval<R&>()));	(3)	(since C++20)
template <ranges::range R> using range_difference_t = std::iter_difference_t<ranges::iterator_t<R>>;	(4)	(since C++20)
template <ranges::range R> using range_value_t = std::iter_value_t<ranges::iterator_t<R>>;	(5)	(since C++20)
template <ranges::range R> using range_reference_t = std::iter_reference_t<ranges::iterator_t<R>>;	(6)	(since C++20)
template <ranges::range R> using range_rvalue_reference_t =     std::iter_rvalue_reference_t<ranges::iterator_t<R>>;	(7)	(since C++20)

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

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

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

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

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

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

7) Used to obtain the rvalue_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.

See also

iter_value_titer_reference_titer_difference_titer_rvalue_reference_titer_common_reference_t (C++20)(C++20)(C++20)(C++20)(C++20)

computes the associate types of an iterator (alias template)