C++ How to Reference Templated Functions using std::bind / std::function

Question

If you have a templated class or a templated function, (or combination of the two), how do you bind that function, (preserving the template type parameter)?

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Answer 1

The key issues is that in C++11 you cannot do something like:

// Doesn't compile
template 
static std::function)> Function;

Classes and Functions can be templated, but not member properties.

The "Magic" is:

/*******************************************************************/
// Define a Function Pointer in a Container
class Storage
{
   template 
   struct FunctionContainer {
       static std::function)> Function;
   };
};
/*******************************************************************/
// Initialize FunctionContainer's Static Function Pointer if using static pointer.
template 
std::function)> Storage
    ::FunctionContainer::Function;

You can then Bind a templated function to this function like:

// Bind Function Pointer in Container to a Local Function
class MyClass
{
   template 
   void MyFunction(std::shared_ptr parameter)
   {
     // Do something.
     // You can make this templated or non-templated.
   }
   MyClass()
   {
     // If you really want, you can templatize std::string in the following:
     Storage::FunctionContainer::Function 
       = std::bind(&MyFunction, this, std::placeholders::_1);
   }
}

And you can invoke all of this and provide a templated type parameter like so:

//Invocation
std::shared_ptr parameter;
parameter->get() = "Hello World".
Storage::FunctionContainer::Function(parameter);