std::forward_list::erase_after

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical Specifications

 

Containers library

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

queue

priority_queue

 

std::forward_list

Member functions

forward_list::forward_list

forward_list::~forward_list

forward_list::operator=

forward_list::assign

forward_list::get_allocator

Element access

forward_list::front

Iterators

forward_list::before_beginforward_list::cbefore_begin

forward_list::beginforward_list::cbegin

forward_list::endforward_list::cend

Capacity

forward_list::empty

forward_list::max_size

Modifiers

forward_list::clear

forward_list::insert_after

forward_list::emplace_after

forward_list::erase_after

forward_list::push_front

forward_list::emplace_front

forward_list::pop_front

forward_list::resize

forward_list::swap

Operations

forward_list::merge

forward_list::splice_after

forward_list::removeforward_list::remove_if

forward_list::reverse

forward_list::unique

forward_list::sort

 

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

Run this code

#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

clear

clears the contents (public member function)