deduction guides for std::ranges::lazy_split_view

From cppreference.com
 
 
Ranges library
Range access
Range conversions
(C++23)
Range primitives



Dangling iterator handling
Range concepts
Views

Factories






Adaptors
Range adaptor objects
Range adaptor closure objects
Helper items
 
 
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

#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>>>);
}