Re: [Vala] inherited constructors

[Jiří Zárevúcky <zarevucky jiri gmail com>]

As in Java, except it's "base", not "super". :)

2009/7/10 pancake <pancake youterm com>:
> I was trying to write some classes in Vala using basic inheritance but
> looks like the compiler does not inherits the class constructors that
> takes at least 1 argument. If the constructor gets no parameters it is
> inherited.
>
> Is this the correct way to do it or it is a bug in Vala? It will safe
> me from lot of copypaste if I can just keep the same constructor for the
> child classes.
>
> It is possible to call upper class constructors or methods like in java?
>
> public Child(string str) {
>  super(str);
> }
>
> It is at least possible to do it :) And i think..a prefered way to work.
>
> --------------------------
>
> Here's an example:
>
> $ cat base.vala
> public class Base : Object
> {
>       public string str;
>
>       public Base(string str) {
>               stdout.printf("base constructor\n");
>               this.str = str;
>       }
>
>       public virtual void foo() { /* empty */ }
> }
>
>
> $ cat child.vala
> public class Child : Base
> {
>       public override void foo()
>       {
>               stdout.printf("Hello %s\n", this.str);
>       }
>
> }
>
> void main()
> {
>       stdout.printf("Main\n");
>       var ch = new Child("perro");
>       ch.foo();
> }
>
> $ valac *.vala
> child.vala:13.11-13.28: error: Too many arguments, method `Child.new' does
> not take 1 arguments
>       var ch = new Child("perro");
>                ^^^^^^^^^^^^^^^^^^
> Compilation failed: 1 error(s), 0 warning(s)
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