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UpdateExpressions as callees must be parenthesized #6922

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nicolo-ribaudo
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Q                       A
Fixed Issues?
Patch: Bug Fix? yes
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass? Yes
Documentation PR
Any Dependency Changes?
License MIT

Examples:

(a++)();
new (a++)();

I found this bug because I actually wrote something like (x++)(function() {})() because I forgot a semicolon lol

@nicolo-ribaudo nicolo-ribaudo added pkg: generator PR: Bug Fix 🐛 A type of pull request used for our changelog categories labels Nov 27, 2017
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babel-bot commented Nov 27, 2017

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/6019/

return (
(t.isMemberExpression(parent) && parent.object === node) ||
// (foo++).test(), (foo++)[0]
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out of curiosity, how to produce a code which spits out an object when postfix operator is used?

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I just tried using a combination of proxies and with, but I don't think it is possible.

Anyway, someone might do something like

var i = 1;
var x = (i++).toString();

@nicolo-ribaudo nicolo-ribaudo merged commit 18c8d97 into babel:master Nov 27, 2017
@nicolo-ribaudo nicolo-ribaudo deleted the generator-parens-update-expression branch November 27, 2017 22:31
@lock lock bot added the outdated A closed issue/PR that is archived due to age. Recommended to make a new issue label Oct 5, 2019
@lock lock bot locked as resolved and limited conversation to collaborators Oct 5, 2019
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4 participants