A range adaptor that represents
view
consisting of the sequence obtained from flattening a view of ranges, with every element of the delimiter inserted in between elements of the view. The delimiter can be a single element or a view of elements.
join_with_view models input_range.
join_with_view models forward_range when:
V and ranges::range_reference_t<V> each model forward_range.join_with_view models bidirectional_range when:
V, ranges::range_reference_t<V>, and Pattern each models bidirectional_range, andPattern each model common_range.join_with_view models common_range when:
V and ranges::range_reference_t<V> each model forward_range and common_range.join_with_view
sized_range or forward_range
std::ranges::view_interface<D>) [edit] returns a constant iterator to the beginning of the range
std::ranges::view_interface<D>) [edit] returns a sentinel for the constant iterator of the range
std::ranges::view_interface<D>) [edit] returns whether the derived view is not empty, provided only if ranges::empty is applicable to it
std::ranges::view_interface<D>) [edit] returns the first element in the derived view, provided if it satisfies forward_range
std::ranges::view_interface<D>) [edit] returns the last element in the derived view, provided only if it satisfies bidirectional_range and common_range
std::ranges::view_interface<D>) [edit] [edit] Deduction guides [edit] Nested classes the iterator type
#include <iostream>
#include <ranges>
#include <string_view>
#include <vector>
int main()
{
using namespace std::literals;
std::vector v{"This"sv, "is"sv, "a"sv, "test."sv};
auto joined = v | std::views::join_with(' ');
for (auto c : joined)
std::cout << c;
std::cout << '\n';
}
Output:
[edit] Defect reportsThe following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR Applied to Behavior as published Correct behavior LWG 4074 C++23join_with_view was underconstrained updated the constraints [edit] See also
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