OpenEuphoria

Re: [phix] if 'number' then why not 'list' ?

• Posted by irv Feb 21, 2021
• 985 views

Phix, yes. OE, no.

That's exactly where classes are useful. e.g:

export class Mammal 
  public string gender; 
end class 
 
export class Whale extends Mammal 
end class 
 
export class Cow extends Mammal 
    public integer horns; 
end class 
 

include Cow.e 
 
Cow Bossie = new() 
Cow Ferdinand = new() 
Bossie.gender = "female" 
Ferdinand.horns = 2 
Whale Nemo = new() 
Nemo.gender = "male" 
Nemo.horns = 2 -- no such field (horns) is the error message; 

You'll note that it isn't necessary for your program to specifically include a file declaring the Mammal class. The Cattle file will include that, and look for the "gender" variable in that class (or classes, as the case may be - multiple inheritance is easy to do, the planning part is difficult.)