Subj : How do you make an object's property const?
To   : netscape.public.mozilla.jseng
From : celsoaguiar
Date : Mon May 10 2004 06:26 pm

I've been trying to figure out how to make an object's 
property constant from JavaScript, and have not found a 
way, at least within SpiderMonkey latest 1.5.

const O = function () {
  this.p = 1; // can't do "const this.p = 1", syntax error.
}
const o = new O();
o.p = 2; // I still can replace o.p

A browse through Ecma standards was not conclusive.
Is this a SpiderMonkey bug (or missing implementation)? 
Or is this a case where my only option to const an 
object's property is from C/C++ via JSPROP_READONLY?
Thanks for the attention,

Celso

.