microsoft / microsoft/TypeScript
Destructuring all but one key dynamically via rest creates an unusable type by omitting all of its keys
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Description
### 🔎 Search Terms
"Destructuring", "Omit, "keyof type> not assignable to Partial",
### 🕗 Version & Regression Information
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about destructuring and Omit and found a somewhat related thing under 'Add a Key Constraint to Omit' but that isn't the change necessitated here
### ⏯ Playground Link
https://www.typescriptlang.org/play/?#code/JYOwLgpgTgZghgYwgAgJLmvJyDeAoZZABgC5kQBXAWwCNoBuA5AexAjIGcwpQBzRwmADuzMjWbMANhDghGAXzx4YFEAjDBWyACoQuAHgAmcMHG0BPAA4QAfAApjpso7NWIAGmSQuAaQjmyAGt-ZhhkFwtrAEpcJmkwZEs4KA04SQAREzgyAAVk1MkjLMjbZABecKyBZARWLhrJVggAdWAwAAtmCjA-c3LkO2CA5CHQytMSmLKbWMJCWpB6nGQAbSGAXTIAfU8AOn3mDuhM02R5fqSU4DSTuGrCS4Lb-sP246qAegAqL5LkAHIAPJUNr6PJXNJFCZuGyeUZhCIw-7IYAcciHZBwDgcYC8EBwGjSLzMLxuAHggpQ1zWGz-XZMP7-eHjakQZGo9EJLE4vEEolgElgMn-ACiAA8EJIKIYIPpmYjrHCQgjikj6XMdMKuDwQLxkAAfcjUOhQA3IDjmWhSdlokAY7m4-GElAC0nWAFsABu0DpTA1jO1fBtnMx2MdfJdguFXp9ux+HyY8mqkqarQ6XR6-js3kz5ii1SgEDAFCgIES+WuGSqeEUeF0BnQkFgiFsdmWpGQABYAEyeJpkABEHULEAHnmEomQ8EkHBQ8k8A6aA-zQA
### 💻 Code
```ts
interface Interface {
0: number;
one: string;
two: boolean;
}
function Test(data: dataType, testKey: keyof dataType) {
let partialData: Partial = data;
const cloneWithoutKey = (key: keyof dataType) => {
const { [key]: _, ...otherData } = partialData;
partialData = otherData;/**Type 'Omit, keyof dataType>' is not assignable to type 'Partial'.
Type 'keyof dataType' is not assignable to type 'Exclude'.
Type 'string | number | symbol' is not assignable to type 'never'.
Type 'string' is not assignable to type 'never'.**/
};
cloneWithoutKey(testKey);
return partialData;
}
Test({ 0: 42, one: "three", two: false }, "one");
```
### 🙁 Actual behavior
otherData resolves to never and is not assignable to partial data
### 🙂 Expected behavior
the rest parameter should be resolved to a partial of the datatype
### Additional information about the issue
_No response_
Guide de contribution
Ouvrir le guide de contribution
Piste de recherche
Commencez par la reproduction liée dans TypeScript Playground et suivez la manière dont la déstructuration d’objet avec clé calculée et les types object-rest sont vérifiés. Confirmez la correction en vérifiant que `otherData` est assignable à `Partial` dans l’exemple générique, tout en conservant le comportement d’omission attendu.
Rédigé par le modèle d'indexation à partir du texte de l'issue.
Évaluation
- Stack technique
- typescript
- Domaine
- compilers
- Type d'issue
- Bug
- Difficulté
- 4/5
- Temps estimé
- 3-5 jours
- Activité
- À l'abandon
- Clarté
- Plutôt claire
- Accessibilité débutants
- 35/100