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

Ranges library

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)

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)
views::counted

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
common_viewviews::common
cache_latest_viewviews::cache_latest (C++26)(C++26)

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

constexpr bool empty() const;		(since C++20)

Checks whether the subrange is empty.

Return value

begin_ == end_

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)
Diagnostics library
Memory management library
Metaprogramming library (C++11)
General utilities library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library (C++17)
Concurrency support library (C++11)
Execution support library (C++26)
Technical specifications
Symbols index
External libraries

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>

size	obtains the size of the `subrange` (public member function)
empty (C++17)	checks whether the container is empty (function template)
ranges::empty (C++20)	checks whether a range is empty (customization point object)

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

Return value

Example

See also

Navigation