Function hooking

[cbk1994]

I've brought this up a few times before, but this would be insanely useful and I think it deserves its own thread.

Function overriding would allow you to essentially overwrite default commands.

For example, if you wanted to create your own tileset layout without a custom movement system (syntax up for debate):

PHP Code:

// weapon -Tiles
//#CLIENTSIDE
function onCreated() {
  tileType = function(x, y) {
    temp.tile = this.level.tiles[x, y];

    if (tile in {1, 2, 3}) {
      return 0;
    } else if (tile in {4, 5, 6}) {
      return 1;
    } // etc
  };

  onWall = function(x, y) {
    return tileType(x, y) == 7; // just an example
  };
} 


Extending object prototypes would also be extremely useful. I think the best way to do it would be to have a class with the same name as the object type. This class would then be 'joined' to all of those objects.

A simple example:

PHP Code:

// class TGraalVar
function capitalize() {
  return this.value.substring(0, 1).upper() @ this.value.substring(1);
} 


Otherwise, you could go the JavaScript route and edit object prototypes

PHP Code:

TGraalVar.prototype.capitalize = function() {
  return this.value.substring(0, 1).upper() @ this.value.substring(1);
}; 


You could then do this:

PHP Code:

temp.str = "hello world!";
echo(str.capitalize()); // echoes "Hello world!" 


Ideally all of this would work both serverside and clientside.

I have no idea how hard this would be to implement, but if it's not too difficult, it would be a huge improvement to GScript.