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| -rwxr-xr-x | vala.html.markdown | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/vala.html.markdown b/vala.html.markdown index 923b152e..c329447d 100755 --- a/vala.html.markdown +++ b/vala.html.markdown @@ -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/). |