Microsoft/TypeScript
Union tuple type in rest argument can't accpect less argument.
Ouverte
#48 663 ouverte le 13 avr. 2022
BugDomain: check: Variance RelationshipsHelp Wanted
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Description
Bug Report
🔎 Search Terms
source has but target allows only
🕗 Version & Regression Information
- This is a crash
⏯ Playground Link
Playground link with relevant code
💻 Code
const func: (...args: [number, string] | [string, number]) => void = (item) => { }
🙁 Actual behavior
throw error
Type '(item: string | number) => void' is not assignable to type '(...args: [number, string] | [string, number]) => void'.
Types of parameters 'item' and 'args' are incompatible.
Type '[number, string] | [string, number]' is not assignable to type '[item: string | number]'.
Type '[number, string]' is not assignable to type '[item: string | number]'.
Source has 2 element(s) but target allows only 1.
🙂 Expected behavior
no error