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deduction guides for std::ranges::lazy_split_view - cppreference.com

From cppreference.com

template< class R, class P > lazy_split_view( R&&, P&& ) -> lazy_split_view<views::all_t<R>, views::all_t<P>>;

 (1) (since C++20)

template< ranges::input_range R > lazy_split_view( R&&, ranges::range_value_t<R> ) -> lazy_split_view<views::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

#include <ranges>
#include <string_view>
#include <type_traits>
using std::operator""sv;

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>>>);
}