Bare bones change detection

[mhevery]

We would like to implement bare bones change detection so that we can unblock ourselves for other parts of the system and work on them in parallel.

https://github.com/mhevery/angular/blob/master/modules/change_detection/src/watch_group.js
https://github.com/mhevery/angular/blob/master/modules/change_detection/src/record.js

I would love to get a very simple change detection going which can only watch simple properties such as foo or bar ie no (foo.bar or foo().bar or anything of that sort)

We should be able to implement this without the need for parser.

class Person {
  var age;
}

var person = new Person();
var pwg = new ProtoWatchGroup();
pwg.watch('age');
var wg = pwg.instantiate();
wg.setContext(person);
var cd = new ChangeDetection(wg);
cd.detectChanges();

Make this test pass:

angular/modules/change_detection/test/change_detection_spec.js

Line 9 in 69210e4

it('should do simple watching', function() {

[vicb]

@mhevery could we discuss that ? how does this relates to #31 ?

[mhevery]

Closed #31 as duplicate. Yes let's chat, tomorrow after Mock interview?

[mhevery]

Make this test pass: https://github.com/angular/angular/blob/master/modules/change_detection/test/change_detection_spec.js#L9

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