Are inline virtual functions really a non-sense?

by

Virtual functions can be inlined sometimes. An excerpt from the excellent C++ faq:

“The only time an inline virtual call
can be inlined is when the compiler
knows the “exact class” of the object
which is the target of the virtual
function call. This can happen only
when the compiler has an actual object
rather than a pointer or reference to
an object. I.e., either with a local
object, a global/static object, or a
fully contained object inside a
composite.”

More Related Contents:

  1. Why do we need virtual functions in C++?
  2. Calling virtual functions inside constructors
  3. C++ “virtual” keyword for functions in derived classes. Is it necessary?
  4. Virtual functions and performance – C++
  5. virtual assignment operator C++
  6. Why do we not have a virtual constructor in C++?
  7. Alternative virtual function calls implementations?
  8. Is the ‘override’ keyword just a check for a overridden virtual method?
  9. Where do “pure virtual function call” crashes come from?
  10. Inline function linkage
  11. C++ inline member function in .cpp file
  12. C++ inlining class methods causes undefined reference
  13. What is the first (int (*)(…))0 vtable entry in the output of g++ -fdump-class-hierarchy?
  14. C++ object size with virtual methods
  15. Function declaration inside or outside the class
  16. What are the differences between overriding virtual functions and hiding non-virtual functions?
  17. Is there still a use for inline? [duplicate]
  18. How will i know whether inline function is actually replaced at the place where it is called or not?
  19. Calling a virtual function from the constructor
  20. Return Type Covariance with Smart Pointers
  21. Is “inline” implicit in C++ member functions defined in class definition
  22. friend AND inline method, what’s the point ?
  23. What’s the point of a final virtual function?
  24. Should one never use static inline function?
  25. Does GCC inline C++ functions without the ‘inline’ keyword?
  26. C++: Pointer to monomorphic version of virtual member function?
  27. Template definitions outside class body
  28. C++: Why does a struct\class need a virtual method in order to be polymorphic?
  29. Mechanism of Vptr and Vtable in C++
  30. Use-cases of pure virtual functions with body?

Leave a Comment