C++ In a Nutshell

Name

binder1st class template — Binds a value to the first argument of a binary function

Synopsis

template <typename Operation>
class binder1st : public unary_function<
  typename Operation::second_argument_type,
  typename Operation::result_type>
{
protected:
  Operation op;
  typename Operation::first_argument_type value;
public:
  binder1st(const Operation& x,
            const typename Operation::first_argument_type& y);
  typename Operation::result_type operator(  )
    (const typename Operation::second_argument_type& x)const;
};

The binder1st class template is a unary functional that binds a fixed value as the first argument to a binary function object. The constructor initializes the op and value data members with the x and y arguments. The operator( ) member function returns op(value, x).

See the bind1st function template for an easier way to construct and use the binder1st class template.

See Also

bind1st function template, binder2nd class template