ens.cpp

#include <iostream>

class Ensurer
{
public:
    void bind(int ptr, bool texturing)
    {
        std::printf("bind(%d, %s)\n", ptr, texturing ? "true" : "false");

        if(ptr != m_ptr)
        {
            m_ptr = ptr;
            m_texturing = false;
            std::printf("Ptr changed, binding color and vertices for %d\n", m_ptr);
        }

        if(!m_texturing && texturing)
        {
            std::printf("Texturing got enabled, binding texture for  %d\n", m_ptr);
            m_texturing = true;
        }
    }

private:
    int m_ptr = 0;
    bool m_texturing = false;

};

int main(int argc, char ** argv)
{
    Ensurer ens;
    ens.bind(1, false);
    ens.bind(1, true);
    ens.bind(1, false);
    ens.bind(2, false);
    ens.bind(3, true);
    return 0;
}