import { type SetReturnType } from "https://deno.land/x/scaffold@0.3.0/src/deps/types.ts";
Create a function type with a return type of your choice and the same parameters as the given function type.
Use-case: You want to define a wrapped function that returns something different while receiving the same parameters. For example, you might want to wrap a function that can throw an error into one that will return undefined instead.
Examples
Example 1
Example 1
import type {SetReturnType} from 'type-fest';
type MyFunctionThatCanThrow = (foo: SomeType, bar: unknown) => SomeOtherType;
type MyWrappedFunction = SetReturnType<MyFunctionThatCanThrow, SomeOtherType | undefined>;
//=> type MyWrappedFunction = (foo: SomeType, bar: unknown) => SomeOtherType | undefined;
definition: Fn extends (this: infer ThisArg, ...args: infer Arguments) => any ? (IsUnknown<ThisArg> extends true ? (...args: Arguments) => TypeToReturn : (this: ThisArg, ...args: Arguments) => TypeToReturn) : ((...args: Parameters<Fn>) => TypeToReturn)