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fix(typescript): stable parens for function type in arrow return type#5790

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ikatyang merged 3 commits intoprettier:masterfrom
ikatyang:fix/typescript/parens-for-function-type-in-arrow-return-type
Jan 22, 2019
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fix(typescript): stable parens for function type in arrow return type#5790
ikatyang merged 3 commits intoprettier:masterfrom
ikatyang:fix/typescript/parens-for-function-type-in-arrow-return-type

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Fixes #5789

  • 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 not an internal change) I’ve added my changes to the CHANGELOG.unreleased.md file following the template.
  • I’ve read the contributing guidelines.

Try the playground for this PR

@ikatyang ikatyang added this to the 1.16.1 milestone Jan 22, 2019
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@VincentLanglet VincentLanglet left a comment

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I tested
const foo = (): (() => void) => (): void => null;
const bar = (): () => void => (): void => null;
const baz = (): ((() => void)) => (): void => null;

And
class Foo {
foo: (() => void)
}

In the playground, and it works well

@ikatyang ikatyang merged commit 153d2d0 into prettier:master Jan 22, 2019
@ikatyang ikatyang deleted the fix/typescript/parens-for-function-type-in-arrow-return-type branch January 22, 2019 13:07
@lock lock bot added the locked-due-to-inactivity Please open a new issue and fill out the template instead of commenting. label Apr 22, 2019
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Bug with type annotation, keep removing and adding parentheses

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