Method empty

include/win/boost/function/function_base.hpp:626–626

Determine if the function is empty (i.e., has no target). */

  /** Determine if the function is empty (i.e., has no target). */
  bool empty() const { return !vtable; }

  /** Retrieve the type of the stored function object, or BOOST_SP_TYPEID(void)
      if this is empty. */