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Get another function's parameter types for use in another function's rest parameter #58991
Description
🔎 Search Terms
Rest parameter
🕗 Version & Regression Information
TypeScript Version 5.5.2
⏯ Playground Link
No response
💻 Code
type AnyFunction = (...args: any[]) => any;
interface TestService {
[key: string]: {
[key: string]: AnyFunction;
};
}
declare function f<S extends keyof TestService , F extends keyof TestService[S], A extends Parameters<TestService[S][F]>>(k1: S, k2: F, ...args: A): void;🙁 Actual behavior
❌report at A : Rest parameter must be an array type or a generic with array constraint
🙂 Expected behavior
It can infer another function's params tuple as a rest param type
Additional information about the issue
#29919 seems similar
found in stackoverflow https://stackoverflow.com/questions/76772628/get-another-functions-parameter-types-for-use-in-another-functions-rest-par
Activity
MartinJohns commentedon Jun 24, 2024
You forgot to fill out the issue template completely.
The code does not show any error in the playground.
STofone commentedon Jun 24, 2024
same code in idea
I tried in ts playground, it works fine.
ts playground
may be is a problem of idea
STofone commentedon Jun 24, 2024
Weird difference between each way of function definition inside object
MartinJohns commentedon Jun 24, 2024
Properties and methods have different variance when
strictFunctionTypesis enabled. And functions and lambdas have differentthiscontext.STofone commentedon Jun 25, 2024
playground
I understand the different
thiscontext, but it seems has no difference of input param types.And it works fine in playground.