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fix(ts): include leading operator in TSUnionType and TSIntersectionType locations#12757

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nicolo-ribaudo merged 3 commits intobabel:mainfrom
fedeci:fix-typealias-leading-operator
Feb 4, 2021
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fix(ts): include leading operator in TSUnionType and TSIntersectionType locations#12757
nicolo-ribaudo merged 3 commits intobabel:mainfrom
fedeci:fix-typealias-leading-operator

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@fedeci fedeci commented Feb 4, 2021 •
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Q                       A
Fixed Issues? Fixes #12754
Patch: Bug Fix? Yes
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass? Yes
Documentation PR Link
Any Dependency Changes?
License MIT

We save the location of the leading operator token and use that to start TSUnionType and TSIntersectionType nodes.

@existentialism existentialism added pkg: parser PR: Bug Fix 🐛 A type of pull request used for our changelog categories labels Feb 4, 2021
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codesandbox-ci Bot commented Feb 4, 2021 •
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JLHwung
JLHwung reviewed Feb 4, 2021
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Comment thread packages/babel-parser/src/plugins/typescript/index.js Outdated
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babel-bot commented Feb 4, 2021 •
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Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/39567/

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armano2 commented Feb 4, 2021

there is one more case that should be taken into account:

type M = | number
type M = & number

typescript in this case generates union type to and babel does not, unless this should be done in separate PR

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JLHwung commented Feb 4, 2021

typescript-eslint also generates TSUnionType: https://astexplorer.net/#/gist/26a69b81ec7db30e30ec05b387673f6a/f69200243fd8bdff13b85238e53688490c0adae0

I think we should align to TypeScript and typescript-eslint. @fedeci Can you work on a fix on that?

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fedeci commented Feb 4, 2021

@JLHwung yes, should I open a new PR for that?

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existentialism commented Feb 4, 2021

@fedeci yeah let's do a new pr

@nicolo-ribaudo nicolo-ribaudo merged commit d1cf66e into babel:main Feb 4, 2021
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nicolo-ribaudo commented Feb 4, 2021

Thanks!

@fedeci fedeci deleted the fix-typealias-leading-operator branch February 4, 2021 19:08
This was referenced Feb 4, 2021
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@existentialism existentialism existentialism approved these changes

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@babel/parser(ts): TSUnionType is not including leading pipe into range

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@fedeci @babel-bot @armano2 @JLHwung @existentialism @nicolo-ribaudo