[C++] Calling erase in reverse iterator

There are some difficulties in using the loop, especially the need to filter out the message.
Share some examples for everyone.

Use multimap associative containers here.
std::multimap<int,std::wstring> List;

List.insert(std::make_pair(1, L"A"));
List.insert(std::make_pair(1, L"B"));
List.insert(std::make_pair(2, L"B"));
List.insert(std::make_pair(3, L"D"));
List.insert(std::make_pair(4, L"E"));
for (std::multimap<int,std::wstring>::reverse_iterator it = List.rbegin(); it != List.rend(); ++it)
{
 if (it->second.find(L"B") != std::wstring::npos) 
 {
  List.erase(std::next(it).base()); 
  it = List.rbegin();
  if (OuthMonitor.empty())
  {
   break;
  }
 }
}

The relationship between it.base() and List is:

List.erase(std::next(it).base());

Then because the iterator has removed one, so specify the original begin.

it = List.rbegin();

Output:

List { size=0x00000003 }
[0x00000001] L"A"
[0x00000003] L"D"
[0x00000004] L"E"