Erasing items from an STL list

Question

I want to make a function which moves items from one STL list to another if they match a certain condition.

This code is not the way to do it. The iterator will most lik

Answer 1

template 
void splice_if(ForwardIterator begin, ForwardIterator end, OutputIterator out, Predicate pred)
{
    ForwardIterator it = begin;
    while( it != end )
    {
        if( pred(*it) )
        {
            *begin++ = *out++ = *it;
        }
        ++it;
    }
    return begin;
}

myList.erase( 
    splice_if( myList.begin(), myList.end(), back_inserter(myOutputList),
        myCondition
    ),
    myList.end()
)