Ugh, well, I guess I typed a lot of stuff for nothing! And by the look
of their experiment, what I wanted was actually one of the major blockers.
It seems classes will really need a more standard type of syntax (non
static) before you could actually achieve this, and might be a bridge
too far for javascript:
class test
{
let x=1;
let y=2;
constructor() {}
func() { this.z=2; } // syntax error
}
Though it could be kind of faked by some kind of reverse hoisting, i.e.,
rebuilding the code inside the engine:
class test
{
constructor()
{
this.x=1;
this.y=2;
// stuff that was in the constructor
Object.seal(this);
}
...
}
[>] Brian
On 3/18/2016 10:04 AM, Sébastien Doeraene wrote:
Hi,
The Strong Mode experiment was canceled:
https://groups.google.com/forum/#!topic/strengthen-js/ojj3TDxbHpQ
Cheers,
Sébastien
On Fri, Mar 18, 2016 at 3:59 PM, kdex <[email protected]
<mailto:[email protected]>> wrote:
Already considered and to be implemented via strong mode IIRC.
On 18.03.2016 14:36, Brian Barnes wrote:
I know properties on classes are getting a look over for the
next iteration (last I checked) and I understand javascript is
obviously a different language then other oo languages with a
different foundation, but I bring this up for it's usage in
producing stricter code that reduces errors and is easier to
analyze. A vote for this if anybody considered it!
class Test
{
constructor()
{
this.x=1;
}
func1()
{
this.y=2;
}
func2()
{
console.log(this.x+','+this.y);
}
}
var test1=new Test();
test1.func1();
test2.func2(); // outputs 1,2
var test2=new Test();
test2.func(); // outputs 1,undefined
I know classes contents are meant to be in strict mode, and I
thinking that only allowing properties to be created in the
constructor (or eventually static properties on the class
itself) would make a system less prone to the conditions like
you see above. Basically, func1() would produce a error when run.
I can see why this type of initialization of properties could be
desired, though, especially as it reflect the way it would have
worked if you used a function instead of a class.
[>] Brian
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