title: C++ standard way to check if type has function with specific signature
body: <p>This question is related to: <a href="https://stackoverflow.com/questions/87372/check-if-a-class-has-a-member-function-of-a-given-signature">Check if a class has a member function of a given signature</a></p>
  
  <p>Is this functionality implemented by C++11 standard or do I need to use custom implementation?</p>