SyntaxError: Stage 2 decorators cannot be used to decorate parameters

[bbenoist]

Hi, thanks for your work!

I have an error with one of my TypeScript project.
I've made a simple project reproducing the issue: bbenoist/prettier-plugin-import-sort-arg-decorator-bug (branch import-sort-cli)

The following valid TypeScript code:

function ArgDecorator(_target: Record<string, any>, _propertyKey: string | symbol, _parameterIndex: number): void {
    console.log(_target, _propertyKey, _parameterIndex)
}

class MyClass {
    myFunction(@ArgDecorator myArg: string){
        console.log(myArg);
    }
}

const foo = new MyClass;
foo.myFunction("hello");

Gives this error (full log - branch import-sort-cli):

$ npm run-script import-sort-cli
> import-sort-cli
...
src/index.ts:
SyntaxError: Stage 2 decorators cannot be used to decorate parameters (10:13)
...

[bbenoist]

Fixed with adding "parser": "typescript" in my package.json config:

  "importSort": {
    ".js, .jsx, .ts, .tsx": {
      "style": "module",
      "parser": "typescript"
    }
  }