std::ranges::lazy_split_view<V,Pattern>::begin

 

C++

Compiler support

Freestanding and hosted

Language

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)

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
to (C++23)
Range primitives
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)
Dangling iterator handling
dangling	borrowed_iterator_t	borrowed_subrange_t
Range concepts
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
Views
view_interface	subrange
Factories
empty_viewviews::empty iota_viewviews::iota	single_viewviews::single basic_istream_viewviews::istream	repeat_viewviews::repeat (C++23)(C++23)
Adaptors
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)
Range adaptor objects
Range adaptor closure objects
Helper items
copyable-box	simple-view

 

std::ranges::lazy_split_view

Member functions

lazy_split_view::lazy_split_view (C++20)

lazy_split_view::base (C++20)

lazy_split_view::begin (C++20)

lazy_split_view::end (C++20)

Nested classes

lazy_split_view::outer_iterator (C++20)

lazy_split_view::outer_iterator::value_type (C++20)

lazy_split_view::inner_iterator (C++20)

Deduction guides

 

constexpr auto begin();	(1)	(since C++20)
constexpr auto begin() const   requires ranges::forward_range<V> && ranges::forward_range<const V>;	(2)	(since C++20)

Returns an outer_iterator to the first element of the lazy_split_view.

Let base_ be the underlying view.

1) Equivalent to

constexpr auto begin() {
  if constexpr (ranges::forward_range<V>)
    return /*outer_iterator*/</*simple_view*/<V>>{*this, ranges::begin(base_)};
  else {
    current_ = ranges::begin(base_);
    return /*outer_iterator*/<false>{*this};
  }
}

2) Equivalent to return /*outer_iterator*/<true>{*this, ranges::begin(base_)};.

Parameters

(none)

Return value

outer_iterator to the first element.

See also

end (C++20)	returns an iterator or a sentinel to the end (public member function)
ranges::begin (C++20)	returns an iterator to the beginning of a range (customization point object)