implement vs override

[Peter C]

NOTE: It's just an idea, not a proposal.

I'm a big fan of clarity in design.

Clarity is what makes your design understandable and maintainable.

'implement' - implements an abstract/interface method - 
First-time definition

'override' - overrrides a concrete base method - Replaces or 
extends existing logic


interface Clickable
{
   void onClick();
}

class Component
{
   void render()
   {
       writeln("Rendering generic component");
   }
}

class Button : Component, Clickable
{
   implement void onClick()
   {
       // First-time implementation of Clickable.onClick
       writeln("Button clicked!");
   }

   override void render()
   {
       // Overrides Component.render
       writeln("Rendering a button");
   }
}

---- currently you can do it this way in D, and it provide very 
little clarity at all.

interface Clickable
{
   void onClick();
}

class Component
{
   void render()
   {
       writeln("Rendering generic component");
   }
}

class Button : Component, Clickable
{
   void onClick()
   {
       writeln("Button clicked!");
   }

   override void render()
   {
       writeln("Rendering a button");
   }
}