Missing const_iterator overload of std::vector::erase() with g++ 4.8

Question

The following example will not compile using g++ 4.8.2:

#include 
#include 
using namespace std;

int main() {
    vector

        

Answer 1

This is a known bug in gcc: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57158

erase requires an iterator instead of a const_iterator with current gcc's.

Answer 2

You can get a non-const iterator via pointer arithmetic, here's a helper function to do that:

template<typename T>
  typename std::vector<T>::iterator
  const_iterator_cast(std::vector<T>& v, typename std::vector<T>::const_iterator iter)
  {
    return v.begin() + (iter - v.cbegin());
  }

used like so:

std::vector<T> v(1);
auto citer = v.cbegin();
v.erase( const_iterator_cast(v, citer) );