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Summary:
This PR adds support for negative values in enums.
Currently when we try to use an enum with negative value:
```ts
enum MyEnum {
ZERO = 0,
POSITIVE = 1,
NEGATIVE = -1,
}
export interface Spec extends TurboModule {
useArg(arg: MyEnum): void;
}
export default TurboModuleRegistry.get<Spec>('Foo');
```
It will fail:
```
Enum values can not be mixed. They all must be either blank, number, or string values.
```
This is because negative values are parsed as `UnaryExpressions` which have `-` operator in front and value as argument.
With the new approach codegen properly generates enums with negative values.
## Changelog:
[GENERAL] [ADDED] - Codegen: Support negative values in enums
Pull Request resolved: https://github.com/facebook/react-native/pull/47452
Test Plan: I've added tests to see if everything is working properly
Reviewed By: vzaidman
Differential Revision: D65887888
Pulled By: elicwhite
fbshipit-source-id: edb25f663dc58afa68c69cb84a47cfc67fc1f7e7
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@react-native/codegen
Installation
yarn add --dev @react-native/codegen
Note: We're using yarn to install deps. Feel free to change commands to use npm 3+ and npx if you like
Testing
To run the tests in this package, run the following commands from the React Native root folder:
yarnto install the dependencies. You just need to run this onceyarn jest packages/react-native-codegen.