Partial<Type> or $Partial<Type> are not supported in react-native-codegen

[vzaidman]

Description

I'm trying to use the codegen to generate a TurboModule with the following type:

export type WindowBounds = {
  x: number;
  y: number;
  width: number;
  height: number;
};

export type WindowBoundsPartial = Partial<WindowBounds>;

But it fails with the error:

UnsupportedGenericParserError: Module NativeWindowModule: Unrecognized generic type 'Partial' in NativeModule spec.

This is a great feature that's supported both in TS (https://www.typescriptlang.org/docs/handbook/utility-types.html#partialtype) and flow (https://flow.org/en/docs/types/utilities/#toc-partial).
Without this feature, I'll have to rewrite the type as

export type WindowBoundsPartial = {
  x?: number;
  y?: number;
  width?: number;
  height?: number;
};

I also tried defining Partial by myself:

type Partial2<T> = {
  [P in keyof T]?: T[P];
};

export type WindowBoundsPartial = Partial2<WindowBounds>;

But this fails too with the error:

UnsupportedTypeAnnotationParserError: Module NativeWindowModule: TypeScript type annotation 'TSMappedType' is unsupported in NativeModule specs.

Version

latest

Output of npx react-native info

n.a

Steps to reproduce

• add

export type WindowBounds = {
  x: number;
  y: number;
  width: number;
  height: number;
};

export type WindowBoundsPartial = Partial<WindowBounds>;

to any Turbo Module spec file

• try to run the codegen

Snack, code example, screenshot, or link to a repository

export type WindowBounds = {
  x: number;
  y: number;
  width: number;
  height: number;
};

export type WindowBoundsPartial = Partial<WindowBounds>;