std::forward_list::erase_after
std::forward_list::erase_after
iterator erase_after( const_iterator pos ); | (1) | (since C++11) |
iterator erase_after( const_iterator first, const_iterator last ); | (2) | (since C++11) |
Removes specified elements from the container.
1) Removes the element following
pos.
2) Removes the elements in the range
(first; last).Parameters
| pos | - | iterator to the element preceding the element to remove |
| first, last | - | range of elements to remove |
Return value
1) Iterator to the element following the erased one, or
end() if no such element exists.
2)
last
Complexity
1) Constant.
2) Linear in distance between
first and last.Example
#include <forward_list>
#include <iterator>
#include <iostream>
int main()
{
std::forward_list<int> l = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
// l.erase( l.begin() ); // ERROR: No function erase
l.erase_after( l.before_begin() ); // Removes first element
for( auto n : l ) std::cout << n << " ";
std::cout << '\n';
auto fi= std::next( l.begin() );
auto la= std::next( fi, 3 );
l.erase_after( fi, la );
for( auto n : l ) std::cout << n << " ";
std::cout << '\n';
}Output:
2 3 4 5 6 7 8 9 2 3 6 7 8 9
See also
| clears the contents (public member function) |
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