René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[ts-5.5] Private aliases expanded in index and keyof types - 5.5 regression ","articleBody":"### 🔎 Search Terms\n\ntype alias inlined regression 5.5\n\n### 🕗 Version \u0026 Regression Information\n\n- This changed between versions 5.5.0-dev.20240514 and 5.5.0-dev.20240515\n\n### ⏯ Playground Link\n\n[Workbench](https://www.typescriptlang.org/dev/bug-workbench/?ts=5.5.0-dev.20240515#code/PTAEAEBMFMGMBsCGAnRAXAlgewHYC5Q1kBXaAKDJAgDMN5odEBbaAxAOjQGcy0BPAA7RQAeVABeUAG8yoOaAHIsAglyIYcAc1nzFygEyr1WsgF8K-IaACSE6Trl6VoNcg3bzZaAA8BWZGigsLhqoNQ4dgAUAG4EIgDaAOROiQC6ADSgWHFMGGgAPCKZANbQfFjUNgB8AJQSVdKmANwUVOC09IwsBABGnDxkGEx+AdLhpmFKTKCJ7MCIiV6+-oHBOKGVkuFNQA)\n\n### 💻 Code\n\n```ts\r\n// @declaration: true\r\n\r\n// @filename: a.ts\r\ntype O = {\r\n    prop: string\r\n    prop2: string\r\n}\r\n\r\ntype I = {\r\n    prop: string\r\n}\r\n\r\nexport const fn = (v: O['prop'], o: Omit\u003cO, keyof I\u003e) =\u003e {};\r\n\r\n// @filename: b.ts\r\n\r\nimport {fn} from './a'\r\nexport const f = fn;\r\n```\r\n\n\n### 🙁 Actual behavior\n\n`O['prop']` is written in declaration file as `{ prop: string; prop2: string; }[prop\"]`. And `Omit\u003cO, keyof I\u003e` is printed as `Omit\u003c{\r\n    prop: string;\r\n    prop2: string;\r\n}, keyof {\r\n    prop: string;\r\n}\u003e` \r\n\r\nThis is problematic especially if the type is a bigger as it balloon the size of the printed type and it may pull in references that were not previously used (causing new errors)\n\n### 🙂 Expected behavior\n\n`O['prop']` is written in declaration file as `string` as `O` and `Omit\u003cO, keyof I\u003e` is printed as `Omit\u003cO, 'prop'\u003e` as in 5.4  since `O` and `I` can't be named\n\n### Additional information about the issue\n\n_No response_","author":{"url":"https://github.com/dragomirtitian","@type":"Person","name":"dragomirtitian"},"datePublished":"2024-05-30T15:36:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/58713/TypeScript/issues/58713"}