Anonymous classes

Question

In Java, the following is commonly used (for example, to handle events) to use a template template template:

abstract class SomeAbstractClass { public abstract void SomeFunction (); } //... SomeAbstractClass obj = new SomeAbstractClass () { public void SomeFunction () { /* implementation */ } }; 

In C ++, the following compilations:

 class SomeAbstractClass { virtual void SomeFunction () = 0; }; // ... SomeAbstractClass * obj = new ( class : public SomeAbstractClass { virtual void SomeFunction () { /* implementation */ } }); 

Why don't people usually do this?

Answer 1

Three problems that I think are encountered with an anonymous class

• You cannot write a constructor because the class does not have a name.
• Inheritance of the initializer list is not allowed.
• capture value is also complicated, the final variable is only available.