std::ranges::subrange<I,S,K>::subrange

 

C++

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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)

Execution support library (C++26)

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 std::from_range_t std::from_range (C++23)(C++23)     to (C++23)

Dangling iterator handling dangling borrowed_iterator_t borrowed_subrange_t

Range primitives
range_size_trange_difference_trange_value_t elements_of (C++23)	iterator_tconst_iterator_tsentinel_tconst_sentinel_t (C++23)(C++23)	range_reference_trange_const_reference_trange_rvalue_reference_trange_common_reference_t (C++23)

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	constant_range (C++23)

Views
view_interface	subrange

Range factories
empty_viewviews::empty	single_viewviews::single	basic_istream_viewviews::istream	iota_viewviews::iota	repeat_viewviews::repeat (C++23)(C++23)

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 concat_viewviews::concat (C++26)(C++26)	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 closure objects range_adaptor_closure (C++23)

Range adaptor objects

Helper items
copyable-box movable-box (until C++23)  (C++23)	simple-view non-propagating-cache

 

std::ranges::subrange

Member functions

subrange::subrange

subrange::operator PairLike

Observers

subrange::begin

subrange::end

subrange::empty

subrange::size

Iterator operations

subrange::advance

subrange::next

subrange::prev

Deduction guides

Non-member functions

get(std::ranges::subrange)

Helper types

subrange_kind

tuple_size<std::ranges::subrange>

tuple_element<std::ranges::subrange>

 

subrange() requires std::default_initializable<I> = default;	(1)	(since C++20)
constexpr subrange( /*convertible-to-non-slicing*/<I> auto i, S s )     requires (!/*StoreSize*/);	(2)	(since C++20)
constexpr subrange( /*convertible-to-non-slicing*/<I> auto i, S s,                     /*make-unsigned-like-t*/<std::iter_difference_t<I>> n )     requires (K == ranges::subrange_kind::sized);	(3)	(since C++20)
template< /*different-from*/<subrange> R >     requires ranges::borrowed_range<R> &&              /*convertible-to-non-slicing*/<ranges::iterator_t<R>, I> &&              std::convertible_to<ranges::sentinel_t<R>, S> constexpr subrange( R&& r )     requires (!/*StoreSize*/ || ranges::sized_range<R>);	(4)	(since C++20)
template< ranges::borrowed_range R>     requires /*convertible-to-non-slicing*/<ranges::iterator_t<R>, I> &&            std::convertible_to<ranges::sentinel_t<R>, S> constexpr subrange( R&& r,                     /*make-unsigned-like-t*/<std::iter_difference_t<I>> n )     requires (K == ranges::subrange_kind::sized)     : subrange{ranges::begin(r), ranges::end(r), n} {}	(5)	(since C++20)

Constructs a subrange.

For the definitions of /*make-unsigned-like-t*/ and /*different-from*/, see make-unsigned-like-t and different-from respectively.

Overload	Data members
	begin_	end_	size_ (only if StoreSize is true)
(1)	value-initialized	value-initialized	initialized with ​0​
(2)	initialized with std::move(i)	initialized with s	N/A
(3)			initialized with n
(4)	initialized with std::move(ranges::begin(r))	initialized with ranges::end(r)	initialized with static_cast<decltype(size_ )>     (ranges::size(r))
(5)			initialized with n

2) If [i, s) is not a valid range, the behavior is undefined.

3) If any of the following conditions is satisfied, the behavior is undefined:

• [i, s) is not a valid range.
• n == to-unsigned-like (ranges::distance(i, s)) is false.

Parameters

i	-	iterator that denotes the beginning of the range
s	-	sentinel that denotes the end of the range
r	-	range
n	-	size hint, must be equal to the size of the range

Defect reports

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

DR	Applied to	Behavior as published	Correct behavior
P2393R1	C++20	for overload (4), size_ might be initialized with ranges::size(r), but it is not always implicitly convertible to the corresponding unsigned-integer-like type	made the conversion explicit