std::experimental::erase_if(std::set)(3)

NAME
std::experimental::erase_if(std::set) - std::experimental::erase_if(std::set)

Synopsis
   Defined in header <experimental/set>
   template< class Key, class Compare, class Alloc, class
   Pred > (library fundamentals TS v2)
   void erase_if( std::set<Key, Compare, Alloc>& c, Pred
   pred );
   Erases all elements that satisfy the predicate pred from the container. Equivalent
   to
 for (auto i = c.begin(), last = c.end(); i != last;)
 {
     if (pred(*i))
         i = c.erase(i);
     else
         ++i;
 }

Parameters
   c - container from which to erase
   pred - predicate that determines which elements should be erased

Complexity
   Linear.

Example
// Run this code
 #include <experimental/set>
 #include <iostream>
 template<typename Os, typename Container>
 inline Os& operator<<(Os& os, Container const& container)
 {
     os << "{ ";
     for (const auto& item : container)
         os << item << ' ';
     return os << '}';
 }
 int main()
 {
     std::set<int> data{3, 3, 4, 5, 5, 6, 6, 7, 2, 1, 0};
     std::cout << "Original:\n" << data << '\n';
     auto divisible_by_3 = [](auto const& x) { return (x % 3) == 0; };
     std::experimental::erase_if(data, divisible_by_3);
     std::cout << "Erase all items divisible by 3:\n" << data << '\n';
 }

Output:
 Original:
 { 0 1 2 3 4 5 6 7 }
 Erase all items divisible by 3:
 { 1 2 4 5 7 }

See also
   remove removes elements satisfying specific criteria
   remove_if (function template)

Category:
     * Noindexed pages