std::ranges::drop_while_view<V,Pred>::begin

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Ranges library

Range access

begin
cbegin
end
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rbegin
crbegin
rend
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size
ssize
data
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empty

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to (C++23)

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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)

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range
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view

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(C++23)(C++23)

Range adaptors

views::all_tviews::all
as_rvalue_viewviews::as_rvalue (C++23)(C++23)
filter_viewviews::filter
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take_viewviews::take
take_while_viewviews::take_while
common_viewviews::common
views::counted
to_input_viewviews::to_input (C++26)(C++26)

ref_view
drop_viewviews::drop
drop_while_viewviews::drop_while
lazy_split_viewviews::lazy_split
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join_viewviews::join
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concat_viewviews::concat (C++26)(C++26)
cache_latest_viewviews::cache_latest (C++26)(C++26)

owning_view
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

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std::ranges::drop_while_view

Member functions
drop_while_view::drop_while_view
drop_while_view::base
drop_while_view::pred
drop_while_view::begin
drop_while_view::end
Deduction guides

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constexprauto begin();		(since C++20)

Returns an iterator to the first element of the view.

Effectively returnsranges::find_if_not(base_,std::cref(pred())), wherebase_ is the underlying view. The behavior is undefined if*this does not store a predicate.

In order to provide the amortized constant time complexity required by therange concept, this function caches the result within thedrop_while_view object for use on subsequent calls.

[edit]Parameters

(none)

[edit]Return value

Iterator to the first element of the view.

[edit]Example

Run this code

#include <cassert>#include <ranges> int main(){staticconstexprauto data={0,-1,-2,3,1,4,1,5};auto view= std::ranges::drop_while_view{data,[](int x){return x<=0;}};assert(view.begin()[0]==3);}