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Fix missing parentheses on async inside for..of#10781

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thorn0 merged 9 commits intoprettier:mainfrom
fisker:for-of-async
May 6, 2021
Merged

Fix missing parentheses on async inside for..of#10781
thorn0 merged 9 commits intoprettier:mainfrom
fisker:for-of-async

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@fisker fisker commented Apr 29, 2021

Description

Fixes #10777

Checklist

  • I’ve added tests to confirm my change works.
  • (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
  • (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
  • I’ve read the contributing guidelines.

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@fisker fisker marked this pull request as ready for review April 29, 2021 09:58
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Strictly speaking, the parens aren't needed in for await (async of []);, but Babel can't parse it without them.

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sosukesuzuki commented Apr 29, 2021

@thorn0 Has it been reported to babel/babel or fixed already in main?

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thorn0 commented Apr 29, 2021

@sosukesuzuki I only left a comment in babel/babel#13208, but I didn't report this issue properly. There are also issues with let (#10777 (comment)). And there might be more. A good read through the spec is needed.

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@thorn0 Thank you. I'll investigate specs and report to babel/babel and fix, okay?

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thorn0 commented Apr 29, 2021

Sounds good 👍 Probably these changes in the spec are recent.

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thorn0 commented Apr 29, 2021

BTW, here is valid TypeScript that compiles to invalid JS by both the TypeScript compiler and Babel (probably fixed by babel/babel#13208): for ((async as any) of []);

@thorn0 thorn0 merged commit 877e64c into prettier:main May 6, 2021
@fisker fisker deleted the for-of-async branch May 7, 2021 01:12
@github-actions github-actions Bot locked as resolved and limited conversation to collaborators May 8, 2022
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Missing parentheses for ((async) of []);

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