Select grandparent from a grandchild ?

[Nicolas Vereenoghe]

Hello,

I would like to know if there's a technic to call a specific grandparent member from within a grandchild.

The "super" keyword allows to call the parent, but I don't find how to call the grandparent (super.super is not allowed), ie :

class GrandParent {

function buildContent() : Void {

trace( "grand parent"); 

}

}

class Parent extends GrandParent {

override function buildContent() : Void {

super.buildContent();

trace( "parent"); 

} 

}

class Child extends Parent {

override function buildContent() : Void {

// WRONG : C++ 'ish synthax to call the grandparent's method instead of its parent 

GrandParent::buildContent();

} 

}

In ActionScript or Javascript you could do the trick thanks to "prototype" and "call" keywords. Please, could you tell me how to deal with this in Haxe ? Thanks :)

[Juraj Kirchheim]

You can keep the old implementation around:

class GrandParent {

function buildContent() : Void {

trace( "grand parent"); 

}

}

class Parent extends GrandParent {

           function GrandParent_buildContent() 

                       super.buildContent();

override function buildContent() : Void {

super.buildContent();

trace( "parent"); 

} 

}

class Child extends Parent {

override function buildContent() : Void {

// WRONG : C++ 'ish synthax to call the grandparent's method instead of its parent 

GrandParent::buildContent();

} 

}

Furthermore, you could use a build macro to auto-generate these "archive" methods for you.

That said: consider using composition over inheritance ;)

Best,

Juraj

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[Nicolas Vereenoghe]

Thanks for the answer ^^

Without the possibility to specify a grandparent, that's indeed how I manage this : the overriden method call a specific method, so that later I could override that specific method. It's just a bit more heavy to write, compared to ActionScript / Javascript / C++ ^^

I was just wondering if there was something into Haxe language to manage this concept of grandparent selection ... without macro or changing design (I don't always own the libraries).