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Misc fixes to @babel/types AST definitions #14730

merged 7 commits into from Jul 7, 2022


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@JLHwung JLHwung commented Jul 6, 2022

Q                       A
Fixed Issues? See below
Patch: Bug Fix?
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass? Yes
Documentation PR Link
Any Dependency Changes?
License MIT
  • Allow BigIntLiteral as property/method key
  • Refine error message when parsing decorator codes without the corresponding plugin: Now Babel will throw "Support for the experimental syntax 'decorators' isn't currently enabled" instead of referring to the legacy decorators plugin.
  • Validate ClassPrivateProperty.static (boolean defaults to false)
    Technically this one may be a breaking change, because now Babel types will throw when the provided static is non-boolean, though I doubt anyone has ever spotted it.
  • Disallow "constructor" as ClassPrivateMethod.kind

@JLHwung JLHwung added PR: Spec Compliance 👓 A type of pull request used for our changelog categories pkg: types labels Jul 6, 2022
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babel-bot commented Jul 6, 2022

Build successful! You can test your changes in the REPL here:

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JLHwung commented Jul 6, 2022

BTW TIL we have "decorators"

decorators: {
validate: chain(

for the PatternLike nodes such as Identifier/ArrayPattern/ObjectPattern. Does @f x has ever been supported in legacy decorators proposal? Currently Babel throws "leading decorators must be attached to a class declaration" anyway. If this property is redundant we can consider remove it from Babel 8.

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nicolo-ribaudo commented Jul 7, 2022

@JLHwung That's probably for TS parameter decorators:

class A {
  f(@d a, @d { x, y }) {}

Changing it goes in the same direction as #9545.

@nicolo-ribaudo nicolo-ribaudo changed the title AST types misc fix Misc fixes to @babel/types AST definitions Jul 7, 2022
@nicolo-ribaudo nicolo-ribaudo merged commit 1c79224 into babel:main Jul 7, 2022
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@nicolo-ribaudo nicolo-ribaudo deleted the ast-types-misc-fix branch Jul 7, 2022
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4 participants