//
//  удаление элементов из вектора указателей на string
//
#include <algorithm>
#include <string>
#include <vector>

struct special_equal_to
{
     const std::string &a;

     explicit special_equal_to(const std::string &a) : a(a) {}

     bool operator()(const std::string *b) const
     {
            return (a == (*b));
     }     
};

...

std::vector<std::string *> v;
std::string s;
...
v.erase(std::remove_if(v.begin(), v.end(), special_equal_to(s)), v.end());

std::vector<std::string> v;
...
v.erase(std::remove(v.begin(), v.end(), s), v.end());

class tracer
{
public:
     tracer() {std::cout <<  "tracer::ctor"  << std::endl;}
     tracer(const tracer &other) { std::cout <<  "tracer::copy_ctor"  << std::endl;}
     ~tracer() {std::cout <<  "tracer::dtor"  << std::endl;}
};

...
std::vector<tracer> v;
v.push_back(tracer());