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Began interface section

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Milo Gilad 2017-08-26 10:34:16 -04:00
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@ -380,11 +380,26 @@ public class MyHD : HardDrive {
// Interfaces: classes can implement any number of these.
interface Laptop { // May only contain abstract methods
interface Laptop { // May only contain abstracts or virtuals
public abstract void turn_on();
public abstract void turn_off();
public abstract int cores; // Won't compile; fields cannot be abstract
public abstract int cores {get; set;} // Will compile
public virtual void keyboard() { // Virtuals are allowed (unlike Java/C#)
stdout.printf("Clickity-clack\n");
}
}
// The ability to use virtuals in Vala means that multiple inheritance is
// possible (albeit somewhat confined)
// Interfaces cannot implement interfaces, but they may specify that certain
// interfaces or classes must be also implemented (pre-requisites).
public interface CellPhone : Collection, GLib.Object {}
```
* More Vala documentation can be found [here](https://valadoc.org/).