Deduction guides¶
Where possible, constructors of concurrent_multiset support class template argument
deduction (since C++17):
template <typename InputIterator,
typename Compare = std::less<iterator_value_t<InputIterator>>,
typename Allocator = tbb_allocator<iterator_value_t<InputIterator>>>
concurrent_multiset( InputIterator, InputIterator, Compare = Compare(), Allocator = Allocator() )
-> concurrent_multiset<iterator_value_t<InputIterator>,
Compare,
Allocator>;
template <typename InputIterator,
typename Allocator>
concurrent_multiset( InputIterator, InputIterator, Allocator )
-> concurrent_multiset<iterator_value_t<InputIterator>,
std::less<iterator_key_t<InputIterator>>,
Allocator>;
template <typename T,
typename Compare = std::less<T>,
typename Allocator = tbb_allocator<T>>
concurrent_multiset( std::initializer_list<T>, Compare = Compare(), Allocator = Allocator() )
-> concurrent_multiset<T, Compare, Allocator>;
template <typename T,
typename Allocator>
concurrent_multiset( std::initializer_list<T>, Allocator )
-> concurrent_multiset<T, std::less<Key>, Allocator>;
Where the type alias iterator_value_t is defined as follows:
template <typename InputIterator>
using iterator_value_t = typename std::iterator_traits<InputIterator>::value_type;
Example
#include <tbb/concurrent_set.h>
#include <vector>
int main() {
std::vector<int> v;
// Deduces cs1 as concurrent_multiset<int>
tbb::concurrent_multiset cs1(v.begin(), v.end());
// Deduces cs2 as concurrent_multiset<int>
tbb::concurrent_multiset cs2({1, 2, 3});
}