[Reference] feat: switched Node to a discriminated union #56274
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typescript-bot
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If you're interested, we have discussed this in the engine262 repo. engine262/engine262#215 (comment) I really hope this can land, but I think there might be performance pushback. |
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Yes; the previous iteration caused check time to triple: #54148 |
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Closing to keep the review queue small. |
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Posting as reference for now. Still has build failures. Not ready for review.
Naming is not at all well-thought-out. Names like
NodeBaseare just what came to mind first.The most breaking portion of this PR's change is that
Nodeno longer has aparent: Node, becauseSourceFilehasparent: undefined. In retrospect this probably could be split into >= two steps:parent: NodeinsideSourceFileparent: Nodetoparent: undefinedinsideSourceFile