The available binary operators are *, /, %, +, -, <<, >>, &, |, and ^ (in this man-page they are generically indicated as the `@' operator). In addition, overloaded operator<< and operator>> for stream insertion and extraction are frequently defined.
If a class Derived supports copy and/or move construction and if it offers a swap member (void Derived::swap(Derived &rhs)), and is publicly derived from FBB::BinopsBase<Derived> then once Derived defines a member
    void Class::operator@=(Rhs const &rhs) &&
        
    defining the compound @-operator for anonymous, temporary Derived
objects and a Rhs type for its right-hand side operand the following
operators are also available:
        
    Derived &operator@=(Rhs const &rhs) &
    Derived operator@(Derived &&lhs, Rhs const &rhs);
    Derived operator@(Derived const &lhs, Rhs const &rhs);
        
A similar procedure applies to the insertion and extraction operators. Insertion and extraction operators become available once BinopsBase<Derived> is declared a friend class of Derived. To make the insertion operator available a private member
    void Derived::insert(std::ostream &out) const
        
    must then also be defined, inserting the calling object into
out. Analogously, to make the extraction operator available a private
member
        
    void Derived::extract(std::istream &in)
        
    must be defined extrating the calling object from in.
--
For each defined Derived &&operator@=(Rhs const &rhs) &&, defined in the class Derived the following operators are automatically also available:
    Derived operator@(Derived &&lhs, Rhs const &rhs);
    Derived operator@(Derived const &lhs, Rhs const &rhs);
        
and
        
    Derived &operator@=(Rhs const &rhs) &;
        
The insertion operator becomew available once
    void Derived::insert(std::ostream &out) const
        
    (inserting the calling object into out) has been defined. Analogously,
the extraction operator becomes available after defining a private member
        
    void Derived::extract(std::istream &in)
        
    (extracting the calling object from in).
To make the insertion and/or extraction operators available the class Derived must also declare
    friend FBB::BinopsBase<Derived>;
        
#include <iostream>
#include <bobcat/binopsbase>
class Demo1: public FBB::BinopsBase<Demo1>
{
    friend FBB::BinopsBase<Demo1>;            // for insert/extract
    public:
        void swap(Demo1 &other)
        {}
        Demo1 &&operator+=(Demo1 const &rhs) &&
        {
            std::cout << "adding two Demo1 objects\n";
            return std::move(*this);
        }
//  Explicit definitions take precedence over functions templates
//  instantiated from definitions in bobcat/binopsbase.
//        Demo1 &operator+=(Demo1 const &rhs) &
//        {
//            std::cout << "adding (self-defined) two Demo1 objects\n";
//            return *this;
//        }
        Demo1 &&operator-=(Demo1 const &rhs) &&
        {
            std::cout << "subtracting two Demo1 objects\n";
            return std::move(*this);
        }
        Demo1 &&operator<<=(Demo1 const &rhs) &&
        {
            std::cout << "shiftleft on two Demo1 objects\n";
            return std::move(*this);
        }
        Demo1 &&operator<<=(size_t rhs) &&
        {
            std::cout << "shiftleft Demo1 object size_t bits\n";
            return std::move(*this);
        }
        void insert(std::ostream &out) const        // requires friend
        {
            out << "inerting a Demo1 object\n";
        }
        void extract(std::istream &in)              // requires friend
        {
            std::cout << "extracting a Demo1 object\n";
        }
};
class Demo2: public FBB::BinopsBase<Demo2>
{
    public:
        void swap(Demo2 &other)
        {}
        Demo2 &&operator+=(Demo2 const &rhs) &&
        {
            std::cout << "adding two Demo2 objects\n";
            return std::move(*this);
        }
        Demo2 &operator+=(Demo2 const &rhs) &
        {
            std::cout << "adding (self-defined) two Demo2 objects";
            return *this;
        }
        Demo2 &&operator^=(Demo2 const &rhs) &&
        {
            std::cout << "xor-ing two Demo2 objects\n";
            return std::move(*this);
        }
        Demo2 &&operator|=(Demo2 const &rhs) &&
        {
            std::cout << "or-ing two Demo2 objects\n";
            return std::move(*this);
        }
};
int main()
{
    Demo1 d1a, d1b;
    Demo1 d1c = d1a + d1b;
    d1a += d1b;
    d1c = Demo1{} + d1b;
    std::cout << "Here we are " << d1c << '\n';
    std::cin >> d1c;
    d1a <<= d1a;
    d1a <<= 5;
    Demo2 d2a, d2b;
    Demo2 d2c = d2a + d2b;
    d2a ^= d2b;
    d2c = Demo2{} ^ d2b;
    d2c = d2c | d2b;
}