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Have QuickInfo use import types to display type aliases that are not in scope
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**Search Terms:**
type alias, import, display, quickinfo, intellisense
**Code**
```ts
// @Filename: file1.ts
export type ComplicatedType<T, U> = { [K in Exclude<keyof T, U>]: T[K] } // could be anything here
export declare function getComplicatedType<T, U extends keyof T>(arg: T, exclude: U): ComplicatedType<T, U>
// @Filename: file2.ts
import { getComplicatedType } from "./file1"
interface SomeInterface {
a: string
b<T>(arg: T): T,
c: { c2: string } | { c3: number },
d?: boolean
}
declare const test: SomeInterface
const result = getComplicatedType(test, "a") // quickinfo on result currently displays something like:
/* const result: {
b: <T>(arg: T) => T;
c: {
c2: string;
} | {
c3: number;
};
d: boolean | undefined;
} */
```
**Current behavior:**
The quick info type shown for `result` is a fully expanded anonymous type because `ComplicatedType` is not in scope in `file2`. Importing `ComplicatedType` in `file2` makes quick info display `const result: ComplicatedType<SomeInterface, "a">`, but I don't think it's common to import a type alias purely for the quick info benefit if it isn't actually used anywhere in the file.
While the example above isn't that bad, in some cases (#18754, #23458) the fully expanded types can be so large that they actually cause a performance issue for the language service.
**Suggested behavior:**
Use `import` types from #22592 to display an accurate qualified reference to `ComplicatedType`. So in the example above quick info for `result` could instead display something like:
```ts
const result: import("./file1").ComplicatedType<SomeInterface, "a">
```
Which, although a little verbose, would be much more readable than many fully expanded types.
**Related Issues:**
#22592 added `import` types.
#18754, #23458, #6070, #13095 - Various issues related to the display of types.
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