411 REFERENCE · Wikibooks
The Science of Programming/SwayPresentations/Objects/ClassesViaConcatenation
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Inheritance via Concatenation
The idea is from Antero Taivalsaari.
Concatenate the environment of the subclass and
the superclass.
Now, looking up a component of a superclass is exactly
the same process as looking up a component of the
subclass.
class g
{
var x = 2;
function me("I'm g");
}
class f extends g
{
var y = 4;
function me("I'm f");
}
Make some objects:
var gobj = new g;
var fobj = new f;
gobj'''s environment:
variable value x 2 me lambda() { "I'm g"; }fobj'''s environment:
variable value y 4 me lambda() { "I'm f"; } x 3 me lambda() { "I'm g"; }
Next
Previous
Top