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

 

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Ranges library

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range_size_trange_difference_t range_value_t	range_reference_trange_const_reference_trange_rvalue_reference_t   (C++23)	iterator_tconst_iterator_tsentinel_t (C++23)
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dangling	borrowed_iterator_t	borrowed_subrange_t
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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
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empty_viewviews::empty iota_viewviews::iota	single_viewviews::single basic_istream_viewviews::istream	repeat_viewviews::repeat (C++23)(C++23)
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ref_view views::all_tviews::all common_viewviews::common owning_view views::counted reverse_viewviews::reverse zip_viewviews::zip (C++23)(C++23) as_const_viewviews::as_const (C++23)(C++23) as_rvalue_viewviews::as_rvalue (C++23)(C++23)	take_viewviews::take take_while_viewviews::take_while drop_viewviews::drop drop_while_viewviews::drop_while zip_transform_viewviews::zip_transform (C++23)(C++23) adjacent_transform_viewviews::adjacent_transform (C++23)(C++23)   cartesian_product_viewviews::cartesian_product (C++23)(C++23)	elements_viewviews::elements keys_viewviews::keys values_viewviews::values transform_viewviews::transform adjacent_viewviews::adjacent (C++23)(C++23) slide_viewviews::slide (C++23)(C++23) stride_viewviews::stride (C++23)(C++23)	filter_viewviews::filter join_viewviews::join split_viewviews::split lazy_split_viewviews::lazy_split join_with_viewviews::join_with (C++23)(C++23) chunk_viewviews::chunk (C++23)(C++23) chunk_by_viewviews::chunk_by (C++23)(C++23)
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copyable-box	simple-view

 

std::ranges::subrange

Member functions

subrange::subrange (C++20)

subrange::operator PairLike (C++20)

Observers

subrange::begin (C++20)

subrange::end (C++20)

subrange::empty (C++20)

subrange::size (C++20)

Iterator operations

subrange::advance (C++20)

subrange::next (C++20)

subrange::prev (C++20)

Deduction guides

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get (C++20)

Helper types

subrange_kind (C++20)

tuple_size (C++20)

tuple_element (C++20)

 

[[nodiscard]] constexpr subrange prev( std::iter_difference_t<I> n = 1 ) const     requires std::bidirectional_iterator<I>;		(since C++20)

Obtains a subrange whose iterator is decremented by n times or incremented by min(-n, size()) times respect to that of *this, when n >= 0 or n < 0 respectively.

Equivalent to auto tmp = *this; tmp.advance(-n); return tmp;. The behavior is undefined if the iterator is decremented after being a non-decrementable value.

Parameters

n

-

number of minimal decrements of the iterator

Return value

A subrange whose iterator is decremented by n times or incremented by min(-n, size()) times respect to that of *this, when n >= 0 or n < 0 respectively.

Complexity

Generally n decrements or min(-n, size()) increments on the iterator, when n >= 0 or n < 0 respectively.

Constant if I models random_access_iterator, and either n >= 0 or std::sized_sentinel_for<S, I> is modeled.

See also

next (C++20)	obtains a copy of the subrange with its iterator advanced by a given distance (public member function)
advance (C++20)	advances the iterator by given distance (public member function)
prev (C++11)	decrement an iterator (function template)
ranges::prev (C++20)	decrement an iterator by a given distance or to a bound (niebloid)