W3cubDocs

/C++

std::ranges::split_view<V,Pattern>::base

constexpr V base() const& requires std::copy_constructible<V>;
(1) (since C++20)
constexpr V base() &&;
(2) (since C++20)

Returns a copy of the underlying view base_.

1) Copy constructs the result from the underlying view.
2) Move constructs the result from the underlying view.

Parameters

(none).

Return value

1) A copy of the underlying view.
2) A view move-constructed from the underlying view.

Example

#include <iostream>
#include <iomanip>
#include <ranges>
#include <string_view>
 
int main()
{
    constexpr std::string_view keywords{ "this throw true try typedef typeid" };
    std::ranges::split_view split_view{ keywords, ' ' };
    std::cout << "base() = " << std::quoted( split_view.base() ) << "\n"
                 "substrings: ";
    for (auto split: split_view)
        std::cout << std::quoted( std::string_view{ split } ) << ' ';
}

Output:

base() = "this throw true try typedef typeid"
substrings: "this" "throw" "true" "try" "typedef" "typeid"

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3590 C++20 the const& overload additionally required validity of copy-assignment constraints relaxed

See also

(C++20)
returns a copy of the underlying (adapted) view
(public member function of std::ranges::lazy_split_view<V,Pattern>)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/ranges/split_view/base