The problem in your initial definition of the class is that you’ve written: class name(object, name): This means that the class inherits the base class called “object”, and the base class called “name”. However, there is no base class called “name”, so it fails. Instead, all you need to do is have the variable in … Read more
It’s a “pointer to member” – the following code illustrates its use: #include <iostream> using namespace std; class Car { public: int speed; }; int main() { int Car::*pSpeed = &Car::speed; Car c1; c1.speed = 1; // direct access cout << “speed is ” << c1.speed << endl; c1.*pSpeed = 2; // access via pointer … Read more
You can use a thread in combination with move semantics: class MyClass final { private: std::thread mythread; void _ThreadMain(); public: MyClass() : mythread{} // default constructor { // move assignment mythread = std::thread{&MyClass::_ThreadMain, this}; } }; The move assignment operator is documented on the following page. In particular, it is noexcept and no new thread … Read more
A class in Java can be garbage-collected when nothing references it. In most simple setups this never happens, but there are situations where it can occur. There are many ways to make a class reachable and thus prevent it from being eligible for GC: objects of that class are still reachable. the Class object representing … Read more
While not available in C++03, C++11 introduces extended initializer lists. You can indeed do it if using a compiler compliant with the C++11 standard. struct Test { Test() : set { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 } { }; int set[10]; }; The above code compiles fine using g++ -std=c++0x … Read more
A gist by Miles Sabin may give you a hint: trait Companion[T] { type C def apply() : C } object Companion { implicit def companion[T](implicit comp : Companion[T]) = comp() } object TestCompanion { trait Foo object Foo { def bar = “wibble” // Per-companion boilerplate for access via implicit resolution implicit def companion … Read more
Not really, it’s just an odd way of making it not raise an error when called via the class: MyClass.call_me() works fine since, even though nothing is implicitly passed as with instances, the default value for that argument is provided. If no default was provided, when called, this would of course raise the TypeError for … Read more
Here is my rationalization: classOf[T] classOf is defined in Predef as a function with this signature: def classOf[T]: Class[T] Although it’s implemented by the compiler, using the function syntax is possible without having to create any special treatment in terms of syntax. So that’s one reason here to consider this option. The alternative like String.class … Read more
I’m guessing this is to avoid lots of “unnecessary typing”. Sadly there’s no way to get rid of the scope (as many other answers have told you) however what I do personally is get the class defined with all my function prototypes in nice rows, then copy/paste into the implementation file then ctrl-c your ClassName:: … Read more