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copied!<p>Firstly, typedefs are your friend:</p> <pre><code>typedef std::function<void(void)> RequestFunc; typedef std::function<void(const std::string&, const std::string&)> DispatchFunc; </code></pre> <p>We can now present your declarations as follows. I have changed the parameter to <code>deliver</code> to take a dispatchFunc (as the original one was a void taking no parameters). I also added <code>;</code> after the class declarations and made the functions you are attempting to bind with <code>public</code>, because of accessibility issues:</p> <pre><code>class A { std::string name; std::string location; public: void deliver( const DispatchFunc& request ) { request( name, location ); } }; class B { public: void dispatch( const DispatchFunc& request ) { }; }; </code></pre> <p>Secondly, I suspect that your <code>deliver()</code> function actually requires a <code>DispatchFunc</code> typedef. Without knowing the purpose of your snippet, it is difficult to tell what you want types you want to bind to.</p> <p>Now that's sorted, on to the declarations. There are issues with using <code>bind</code> (in Windows, at least) due to naming conflicts with the windows socket library. This may or may not be an issue on your compiler, but it's always a good idea to prefix the <code>boost</code> namespace:</p> <pre><code> B b; auto func1 = boost::bind( &B::dispatch, b ); A a; auto func2 = boost::bind( &A::deliver, a, func1); </code></pre> <p>These modifications got a successful compile for me. As for the rest and what you <em>intend</em> to do, good luck.</p>

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