iskm/learnxinyminutes-docs
1
0
Fork 0
mirror of https://github.com/adambard/learnxinyminutes-docs.git synced 2024-12-23 17:41:41 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Began interface section

Browse Source
This commit is contained in:
Milo Gilad 2017-08-26 10:34:16 -04:00
parent ce745f43ed
commit 41e5f956e1
1 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
vala.html.markdown
View File

@ -380,10 +380,25 @@ public class MyHD : HardDrive {
// Interfaces: classes can implement any number of these. // 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_on();
public abstract void turn_off(); 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 {}
``` ```