How to call a templated function if it exists, and something else otherwise?

Question

I want to do something like

template 
void foo(const T& t) {
   IF bar(t) would compile
      bar(t);
   ELSE
      baz(t);
}

Answer 1

If you're willing to limit yourself to Visual C++, you can use the __if_exists and __if_not_exists statements.

Handy in a pinch, but platform specific.