How to create a new capability by adding a prototype inheritance like javascripts for CLASSES language

[Tung Thanh Le]

Hi all, 

   I am a newbie in scheme language, I am dealing with a problem that how to create a new capability for Classes language. I came up with my design as follows.

Expression::= extendx Identifier 

                                         {field Identifier}* 

                                         {method Identifier ({Identifier}*(,)) expression}

This "extendx" will inherit all properties from an object. For example,

class c1 extends object

   field x

   method m1 () 1

let o1 = new c1()

let o2 = extendx o1

    field f1= 10

    method m1 () 2

in list(send o2 f1, send o2 m1())

This is like a prototypal inheritance in js.

how can I modify to make it work? since I still not figure out how to do. Thanks.