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.
[edit] 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>>>);
}
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