std::ranges::split_view<V,Pattern>::base
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(C++23)
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.
[edit] Return value
1) A copy of the underlying view.
2) A view move-constructed from the underlying view.
[edit] Example
Run this code
#include <iomanip> #include <iostream> #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}) << ' '; std::cout << '\n'; }
Output:
base() = "this throw true try typedef typeid" substrings: "this" "throw" "true" "try" "typedef" "typeid"
[edit] 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 |