Terser arrow function + destructuring syntax - thoughts?

[bcherny]

This is my first time posting here, and I'm not sure this is the right place to do it, but I was wondering what you guys think of making parens around destructured arrow function parameters optional. If this gets positive feedback, I can write up a proposal:

// Today
let fn1 = _ => _ + 1
let fn2 = ({_}) => _ + 1
let fn3 = ([_]) => _ + 1

// Proposed (more uniform syntax)
let fn1 = _ => _ + 1
let fn2 = {_} => _ + 1
let fn3 = [_] => _ + 1

[ljharb]

How can a parser/engine know that those aren't an object literal, a block, or an array literal, without having to backtrack when it finds the "=>"?

[ljharb]

How can a parser/engine know that those aren't an object literal, a block, or an array literal, without having to backtrack when it finds the "=>"?

[bcherny]

How does it know with the current syntax?

[bcherny]

How does it know with the current syntax?

[michaelficarra]

and I'm not sure this is the right place to do it

It is not the right place. From CONTRIBUTING.md:

Feature Requests

Feature requests for future versions of ECMAScript should not be made in this repository. To make a feature request, post to the es-discuss mailing list. Your goal will be to convince others that your proposal is a useful addition to the language and recruit TC39 members to help turn your request into a proposal and shepherd it into the language.

[michaelficarra]

and I'm not sure this is the right place to do it

It is not the right place. From CONTRIBUTING.md:

Feature Requests

Feature requests for future versions of ECMAScript should not be made in this repository. To make a feature request, post to the es-discuss mailing list. Your goal will be to convince others that your proposal is a useful addition to the language and recruit TC39 members to help turn your request into a proposal and shepherd it into the language.

[bcherny]

@michaelficarra - Got it, will post on es-discuss instead.

[bcherny]

@michaelficarra - Got it, will post on es-discuss instead.