Adding To A Class

[Zaei]

#include <string>

template<typename E, typename T = std::char_traits<E>, typename A = std::allocator<E> >
class my_basic_string : public std::basic_string<E, T, A>
{
public:
  /**/ trim(/**/);
  // your new functions here
};

typedef my_string my_basic_string<char>;

Should work, methinks.

Z.