Instance bound class methods

[Brendan Eich]

You're counting on the property assignment being moved into the 
constructor, where `this` is bound. In a class body in ES6 (without 
property assignment extension), especially in the top level where method 
defintiions go, `this` isn't obviously bound to the newly constructed 
instance.

Ok, that's kind of a nit, or an observation. No worries.

Bigger question is what we want: method per instance allocation cost, 
which what you did imposes? Or something that can be more efficiently 
implemented, such as what Strong/SoundScript proposes (last I looked). 
The latter is what Java and C++ do. Then the trick is enabling 
first-class function extraction from method, which is a 
pay-for-what-you-ask-for alternative to allocation per method per 
constructed instance.

/be

Matthew Robb wrote:
> Are there any proposals or any discussions around solving the problem 
> of instance bound class methods with some sugar?
>
> There are examples of people doing things like this: 
> https://github.com/reactjs/react-future/blob/master/01%20-%20Core/01%20-%20Classes.js#L31
>
> My proposal would be to extend method shorthand syntax to support the 
> arrow:
>
> ```
> class A extends React.Component {
>   handleClick(event)=> {
>      ...
>   }
> }
> ```
> Which would be sugar for:
> ```
> class A extends React.Component {
>   handleClick = (event)=> {
>      ...
>   }
> }
> ```
> - Matthew Robb
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