Possible for C++ template to check for a function's existence?
- by andy
Is it possible to write a C++ template that changes behavior depending on if a certain member function is defined on a class?
Here's a simple example of what I would want to write:
template<class T>
std::string optionalToString(T* obj)
{
if (FUNCTION_EXISTS(T->toString))
return obj->toString();
else
return "toString not defined";
}
So if class T has "toString" defined then it uses it, otherwise it doesn't. The magical part that I don't know how to do is the "FUNCTION_EXISTS" part.
