Why doesn't C++11 implicitly convert lambdas to std::function objects?

Question

I implemented a generic event emitter class which allows code to register callbacks, and emit events with arguments. I used Boost.Any type erasure to store the callbacks so

Answer 1

The compiler doesn't infer anything because the compiler implements the C++ language, and the language's template argument deduction rules do not allow the deduction in the way you want.

Here's a simple example that represents your situation:

template  struct Foo
{
    Foo(int) {}
};

template  void magic(Foo const &);

int main()
{
    magic(10);   // what is T?
}