[Lexical]Refactor: Change UnionToIntersection flow type#7643
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potatowagon
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Jun 24, 2025
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fantactuka
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Aug 11, 2025
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Description
The
anytype inUnionToIntersectioncaused a flow error at meta internally.In Flow,
mixedis the preferred top type (similar to TypeScript'sunknown), whileanyis less type-safe.The
anyin(x: infer R) => anyis kept unchanged because it's only used for the return type of the function type pattern, and we're only interested in extracting the parameter typeR.Test plan
existing tests