Is TypeScript not using revealing module pattern for classes?

Question

Is TypeScript not using revealing module pattern for classes? I expected different result from this code.

class Test {

    private privateProperty: any;

    public publicProperty: any;     
}

generates this:

var Test = (function () {
    function Test() { }
    return Test;
})();

I expected something like this:

var test = (function(){
    var privateProperty;
    var publicProperty;

    return {
        publicProperty: publicProperty;
    };

})();

No, it’s not. `private`/`public` checking is just done by the compiler and doesn’t influence generated code. (But that’s just a guess. `:)`) Your second example wouldn’t be right, though; it doesn’t even return a function. — Ry-, Apr 01 '13 at 16:36
The codegen for `module` is most similar to what you've posted — Ryan Cavanaugh, Apr 01 '13 at 16:43
@minitech: No, it does not return function, it returns object literal. It is called revealing module pattern. See here: http://stackoverflow.com/questions/5647258/how-to-use-revealing-module-pattern-in-javascript — epitka, Apr 01 '13 at 17:19
@epitka: Oh. Well that’s a module, not remotely a constructor. — Ry-, Apr 01 '13 at 17:57
@minitech: What do you mean by "not remotely a constructor"? — epitka, Apr 02 '13 at 15:08
@epitka: It’s not a function! There’s no constructor involved, so it couldn’t represent a class. — Ry-, Apr 02 '13 at 23:01

score 9 · Accepted Answer · answered Apr 01 '13 at 17:33

9

RMP is not appropriate for class-based design. module does what you want:

module myMod {
    var x = 31;
    export var y = x + 15;
}

Generates:

var myMod;
(function (myMod) {
    var x = 31;
    myMod.y = x + 15;
})(myMod || (myMod = {}));

Salient features here:

answered Apr 01 '13 at 17:33

Ryan Cavanaugh

I thought that "class" in typescript correlates to what I consider a class in c#, meaning private and public members etc., and module more like a namespace – epitka Apr 02 '13 at 15:11

1 Answers1