std::flat_set<Key,Compare,KeyContainer>::insert_range

 

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std::flat_set

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flat_set::flat_set flat_set::operator= Iterators flat_set::beginflat_set::cbegin flat_set::endflat_set::cend flat_set::rbeginflat_set::crbegin flat_set::rendflat_set::crend Capacity flat_set::size flat_set::max_size flat_set::empty Observers flat_set::key_comp flat_set::value_comp      Modifiers flat_set::clear flat_set::insert flat_set::insert_range flat_set::emplace flat_set::emplace_hint flat_set::erase flat_set::swap flat_set::extract flat_set::replace Lookup flat_set::count flat_set::find flat_set::contains flat_set::equal_range flat_set::lower_bound flat_set::upper_bound Non-member functions operator==operator<=> swap(std::flat_set) erase_if(std::flat_set)

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uses_allocator<std::flat_set>

Tags

sorted_unique      sorted_unique_t

Deduction guides

 

template< container-compatible-range<value_type> R > void insert_range( R&& rg );		(since C++23)

Inserts a copy of each element in the range rg into underlying container c as if by:

for (const auto& e : rg)
    c.insert(c.end(), e);

Then, sorts the range of newly inserted elements with respect to compare. Merges the resulting sorted range and the sorted range of pre-existing elements into a single sorted range. Finally, erases all but the first element from each group of consecutive equivalent elements.

Each iterator in the range rg is dereferenced exactly once. The behavior is undefined if rg overlaps with the container.

Parameters

rg

-

a container compatible range, that is, an input_range whose elements are convertible to T

Return value

(none)

Complexity

N + M·log(M), where N is size() before the operation and M is ranges::distance(rg).

Notes

Since insert_range performs an in-place merge operation, that may allocate memory.

Example

Run this code

#include <iostream>
#include <flat_set>
 
void println(auto, auto const& container)
{
    for (const auto& elem : container)
        std::cout << elem << ' ';
    std::cout << '\n';
}
 
int main()
{
    auto container = std::flat_set{1, 3, 2, 4};
    const auto rg = {-1, 3, -2};
#ifdef __cpp_lib_containers_ranges
    container.insert_range(rg);
#else
    container.insert(rg.begin(), rg.end());
#endif
    println("{}", container);
}

Output:

-2 -1 1 2 3 4

See also

insert

inserts elements (public member function)