I know this is probably bad timing (considering [this PR][1] and the fallout that followed), but I was thinking that it'd be nice if we could insert a `[no LineTerminator here]` clause in a few places, to remove some of the ASI hazards for those going semicolon-free, along with some extras for consistency:
- Before the `[` in the second rule of [`MemberExpression`][2] and the fourth rule of [`CallExpression`][3] - Before `Arguments` in the last rule of [`MemberExpression`][2], the third and sixth rule of [`CallExpression`][3], and [`CoverCallExpressionAndAsyncArrowHead`][4] - Before the `(` in [`FunctionDeclaration`][5], [`FunctionExpression`][6], the first, fourth, and fifth rule of [`MethodDefinition`][7], [`GeneratorMethod`][8], both rules in [`GeneratorDeclaration`][9], and [`GeneratorFunction`][10] One of the practical effects would be this: this source (taken from the spec): ```js a = b + c (d + e).print() ``` is currently interpreted as: ```js a = b + c(d + e).print(); ``` but would, with this proposal, be interpreted as this, which is a *lot* more intuitive with what people would expect: ```js a = b + c; (d + e).print(); ``` I know there's risk of web compat concerns, but I doubt they'd be significant for anything that's not minified via the Closure Compiler (which limits line length by default for reasons of old IE). Also, for most non-ASI people, they probably just forgot a semicolon anyways, and [here][11] is a concrete example of this, where ESLint was fixing a linter violation incorrectly because it wasn't reading it as you'd expect. [1]: https://github.com/tc39/ecma262/pull/1062 [2]: https://tc39.github.io/ecma262/#prod-MemberExpression [3]: https://tc39.github.io/ecma262/#prod-CallExpression [4]: https://tc39.github.io/ecma262/#prod-CoverCallExpressionAndAsyncArrowHead [5]: https://tc39.github.io/ecma262/#prod-FunctionDeclaration [6]: https://tc39.github.io/ecma262/#prod-FunctionExpression [7]: https://tc39.github.io/ecma262/#prod-MethodDefinition [8]: https://tc39.github.io/ecma262/#prod-GeneratorMethod [9]: https://tc39.github.io/ecma262/#prod-GeneratorDeclaration [10]: https://tc39.github.io/ecma262/#prod-GeneratorExpression [11]: https://github.com/eslint/eslint/issues/7787 ----- Isiah Meadows [email protected] Looking for web consulting? Or a new website? Send me an email and we can get started. www.isiahmeadows.com _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
