deduction guides for std::ranges::lazy_split_view

 

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

 

template< class R, class P > lazy_split_view( R&&, P&& )     -> lazy_split_view<ranges::all_t<R>, ranges::all_t<P>>;	(1)	(since C++20)
template< ranges::input_range R > lazy_split_view( R&&, ranges::range_value_t<R> )     -> lazy_split_view<ranges::all_t<R>, ranges::single_view<ranges::range_value_t<R>>>;	(2)	(since C++20)

These deduction guides are provided for lazy_split_view to allow deduction from a range and a delimiter.

1) The delimiter is a range of elements.

2) The delimiter is a single element.

Example

Run this code

#include <ranges>
#include <string_view>
#include <type_traits>
using std::operator""sv;
 
// A temporary patch until P2210R2 is available in the online compiler
#define lazy_split_view split_view
 
int main() {
    std::ranges::lazy_split_view w1{"a::b::c"sv, "::"sv};
    // type of w1 is lazy_split_view<string_view, string_view>:
    static_assert(std::is_same_v<
        decltype(w1),
        std::ranges::lazy_split_view<
            std::basic_string_view<char, std::char_traits<char>>,
            std::basic_string_view<char, std::char_traits<char>>>>);
 
    std::ranges::lazy_split_view w2{"x,y,z"sv, ','};
    // type of w2 is lazy_split_view<string_view, single_view<char>>:
    static_assert(std::is_same_v<
        decltype(w2),
        std::ranges::lazy_split_view<
            std::basic_string_view<char, std::char_traits<char>>,
            std::ranges::single_view<char>>>);
}