> On Mar 23, 2015, at 10:42 AM, Jacob Parker <[email protected]
> <mailto:[email protected]>> wrote:
>
> I noticed expression closures, as defined below, have been excluded from the
> spec.
>
> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Expression_closures
>
> <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Expression_closures>
>
> Currently implemented (and deprecated) in Firefox, which hasn't broken
> anything by the looks of things.
>
> While offering little above arrow functions,
exactly
> including these, in addition to the existing shorthand syntaxes, should make
> the following examples work.
>
> var x = { value: 3, toString() 'string', valueOf() this.value };
>
> class x { constructor { this.value = 3; } valueOf() this.value }
what you show above would be an expression bodied "concise method"
http://people.mozilla.org/~jorendorff/es6-draft.html#sec-method-definitions
<http://people.mozilla.org/~jorendorff/es6-draft.html#sec-method-definitions>
That’s a different beast from a FF “expression closure”.
These were consider but not adopted for ES6. Primarily because they introduced
grammar, ASI and/or other issues that at the time didn’t see worth trying to
solve.
Allen
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