(opt-in) Improve @babel/types with env.BABEL_TYPES_8_BREAKING#10917
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nicolo-ribaudo merged 1 commit intobabel:masterfrom Jan 11, 2020
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Co-authored-by: Justin Ridgewell <justin+github@ridgewell.name>
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JLHwung
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Dec 24, 2019
| export function assertClassExpression(node: Object, opts?: Object = {}): void { | ||
| assert("ClassExpression", node, opts); | ||
| } | ||
| export function assertClassDeclaration(node: Object, opts?: Object = {}): void { |
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I think they are sorted alphabetically?
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This file is automatically generated. I had to swap then in the definitions/es2015 file, so they got swapped here.
nicolo-ribaudo
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Dec 24, 2019
| fields: { | ||
| // todo | ||
| }, | ||
| fields: !process.env.BABEL_TYPES_8_BREAKING |
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I used ! everywhere so that, when deleting it for Babel 8, I only have to make one selection (from ! to :) rather than two (from ! to ? and then from : to the end).
Dev-optimization? 😄
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As discussed during the Dec 04 meeting, I'm introducing the stricter AST validation of #5971 behind a flag.
We decided to introduce those breaking changes when the
process.env.BABEL_TYPES_8_BREAKINGenv variable is enabled, to give time to some popular projects (likereact-native) to update their code before the Babel 8 release, to provide a smoother update experience to our users.I didn't include the changes related to the default value of
decorators(since they are still highly experimental, I don't think we should pollute the AST unless the parser plugin is enabled). Also, I didn't include thevalidateDeeplogic, but we can introduce it later in our test runner.Our tests are already passing when
BABEL_TYPES_8_BREAKING=true.